==== Front Int J Environ Res Public Health Int J Environ Res Public Health ijerph International Journal of Environmental Research and Public Health 1661-7827 1660-4601 MDPI 33287267 10.3390/ijerph17239006 ijerph-17-09006 Article Constipation and Its Associated Factors among Patients with Dementia https://orcid.org/0000-0002-9508-8396Chen Chien-Liang 12† Liang Tzu-Ming 3 Chen Hsiu-Hui 4 Lee Yan-Yuh 5 Chuang Yao-Chung 67† https://orcid.org/0000-0003-2684-0377Chen Nai-Ching 6* 1 Division of Nephrology, Kaohsiung Veterans General Hospital, Kaohsiung 813, Taiwan; cclchen@seed.net.tw 2 Department of Medicine, National Yang-Ming University School of Medicine, Taipei 112, Taiwan 3 Nutrition Therapy Department, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 813, Taiwan; dino09200@cgmh.org.tw 4 Physical Education, National Kaohsiung University of Science and Technology, Kaohsiung 807, Taiwan; evahhchen@gmail.com 5 Department of Physical Medicine and Rehabilitation, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 833, Taiwan; b9005009@cgmh.org.tw 6 Department of Neurology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833, Taiwan; ycchuang@adm.cgmh.org.tw 7 Department of Neurology, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan * Correspondence: naiging@yahoo.com.tw; Tel.: +886-7731-7123 (ext. 3304); Fax: +886-7-7318762† These authors have equal contribution as co-first authors. 03 12 2020 12 2020 17 23 900621 9 2020 30 11 2020 © 2020 by the authors.2020Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).Constipation is one of the most frequent non-motor problems in older adults. As constipation is commonly ignored by dementia patients, it is not usually reported on time. Constipation has a serious impact on the activity of daily living and quality of life in dementia patients. The relationships between constipation, demographic variables, and the nutritional status of patients with dementia remain unknown. This study aimed to assess the possible factors associated with constipation. This cross-sectional study was conducted at the Kaohsiung Chang Gung Memorial Hospital from January to November 2019. This hospital is a medical center and the main referral hospital of southern Taiwan, serving 3 million inhabitants. In total, 119 patients with dementia were evaluated using the Rome III diagnostic criteria for functional constipation. There were 30 patients with dementia included in the constipation group and 89 patients with dementia included in the no constipation group. Mini-Nutritional Assessment and 3-day diet diary records were employed. The clinical dementia rating score was used to evaluate the severity of dementia in patients of the outpatient clinic. Approximately 25.2% of dementia patients had constipation. Patients in the dementia with constipation group were older, had severer dementia, and displayed a lower water intake. After multivariable adjustment, low liquid consumption was the predictor of constipation among patients with dementia. The findings support the clinical recommendations to treat constipation with an increased liquid intake, but not exercise, in dementia patients. dementiaMini-Nutritional Assessmentconstipationfiberwaterdiet diary record ==== Body 1. Introduction Dementia is a neurodegenerative disease with a progressive, irreversible, and long-term course. Its recent high prevalence rate in Western and Asian countries has a significant impact on modern society due to global aging [1]. The great majority of individuals with dementia are cared for by family members in the community. With the increasing number of individuals with dementia, several questions have been raised on how parents are being cared for. Currently, there is no cure for dementia; treatment is only focused on the care of dementia patients and allowing the person with dementia and their families to live well in the community. Caring for patients with dementia poses many challenges for families and caregivers. A meta-analysis study found that dementia family caregivers were significantly more stressed than non-dementia caregivers, and more likely to experience serious depressive symptoms and physical problems [2]. Overall, one-third of the caregivers (disregarding the care demand and care recipient in dementia stage) provided >14 h of care on a daily basis. Meanwhile, basic and instrumental activities of daily living (ADLs) impairments (e.g., bathing and toileting as daily basic life needs) (68%) were the most common concerns of most caregivers [3]. Understanding how to support the daily activities of dementia patients could be helpful to families, caregivers, and patients themselves. Toileting, which includes bowel movements (stool passage) and urination, is a basic need, and constipation and urinary incontinence are common health problems among older adults, including those with dementia. Constipation is one of the most common health problems encountered in primary healthcare settings and occurring in the general population, as well as among older adults, especially those with dementia [3,4,5]. Constipation is characterized by the formation of hard stools, infrequent defecation (fewer than two times per week), and the prolonged and difficult evacuation of stools. Patients with persistent constipation have a lower quality of life and experience financial burdens owing to health costs [6,7,8,9]. Patients with dementia might not be able to express the pain and discomfort of the constipation orally and may display aggressive behavior instead, so the constipation will be untreated or the patient will be wrongly given an anti-psychotic drug [10,11,12]. This can make matters worse because the anti-psychotic drugs may cause constipation. Therefore, how to prevent constipation is very important. An ounce of prevention is worth a pound of cure. The pathogenesis of constipation is multifactorial, with a focus on dietary behavior, such as low fiber consumption, a lack of adequate fluid intake, a lack of mobility, disturbance in the hormone balance, the side effects of medications with anti-cholinergic actions, and hemorrhoids [8,9,10,11,12]. However, constipation has never been isolated in patients with dementia. Given that epidemiological and clinical studies have reported an association of constipation in patients with dementia and that little is known about the risk factors of constipation, such as demographic factors and diet behaviors, this study aimed to assess the epidemiological data and possible factors associated with constipation. 2. Materials and Methods 2.1. Ethical Statement A total of 119 patients with dementia in the Dementia Outpatient Clinic of Kaohsiung Chang Gung Memorial Hospital were enrolled in the study. Patients or primary caregivers who could not record all food consumed within a 72 h period were excluded from this study. All procedures performed in the study were in accordance with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This study was approved by the Chang Gung Medical Foundation Institutional Review Board, and informed consent was obtained from all participants (CGMH-IRB No 201600385B0). In the International Classification of Diseases, Tenth Edition (ICD-10) [13], dementia is defined as a disorder with deterioration in both memory and thinking, which is sufficient to impair the personal activities of daily living. The definition requires that the patient has deficits in thinking and reasoning, in addition to memory disturbance. The Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) [14], defines dementia as a syndrome characterized by the development of multiple cognitive deficits, including memory impairment and at least one of the following cognitive disturbances: aphasia; apraxia; agnosia; and a disturbance in executive functioning. The criteria included in the study were that the patients, supported by their caregivers, could receive all examinations and complete the records. The main caregiver needed to stay with the patient every day and have no subjective cognitive decline/complaint. The exclusion criteria for all subjects in the study were patients who had colorectal cancer or colorectal inflammation disease. The other exclusion criteria for enrolled subjects included end stage renal disease, tumor under hospice care, chronic pain with regular painkillers in use (morphine, ultracet, and nonsteroidal anti-inflammatory drugs), and hematologic, endocrine, and autoimmune diseases. 2.2. Demographic and Neurobehavioral Assessments All patients underwent general physical examinations and clinical interviews. Patients’ clinical data were obtained, including their age, sex, and comorbidities, including diabetes mellitus, hypertension, hyperlipidemia, coronary artery disease, and chronic kidney disease. A trained neuropsychologist administered the neurobehavioral tests, including the Mini-Mental State Examination (MMSE) [15] to assess their general intellectual function, and clinical dementia rating (CDR) scores [16] to evaluate the severity of patients’ cognitive impairment in the dementia integrated outpatient clinic. 2.3. Blood Collection and Analysis of the Circulating Biochemical Data Blood samples were collected between 8 and 10 a.m. after an overnight fast and analyzed by the central laboratory of Kaohsiung Chang Gung Memorial Hospital to determine the serum levels of hemoglobin, total cholesterol, triglycerides, glycated hemoglobin (HbA1c), homocysteine, vitamin B12, and folate. The blood samples were centrifuged at 3000 rpm for 10 min to obtain serum samples, and all circulating biochemical markers were immediately analyzed, as reported previously [17,18,19]. 2.4. Anthropometric Measurements Height and weight were measured, with patients wearing a disposable gown given to them. The body mass index (BMI) was calculated as the weight in kilograms divided by the height in meters squared. The waist circumference (narrowest diameter between the xiphoid process and iliac crest) was measured using a Lufkin measuring tape. The hip circumference was measured at the level of maximum extension of the hip. 2.5. Dietary, Exercise, and Constipation Assessments With regard to the Mini-Nutritional Assessment (MNA) (maximum score: 30) [20], a score below 23.5 was defined as at risk and 24–30 was defined as a normal nutritional status. The patients and their caregivers also received specific dietary counseling on required dietary adaptations, proposals of menus, and advice. In this study, we evaluated their diets by making them complete a 3-day diary diet record (fluids included milk, juice, and soup). A single and well-trained dietitian provided oral instructions on how to perform the dietary registration and analysis. He presented them with a sample spoon, cup, plate, and bowel to permit them to report similar sizes and amounts. The dietary intake was recorded for two weekdays (from Monday to Friday) and one weekend day (Saturday or Sunday). Thereafter, patients and their caregivers were interviewed by the same dietitian to determine and correct the amount of ingested food using a food replica model (Nasco food replicas). We analyzed the macronutrients according to the information from the Taiwan Food and Drug Administration website [21]. The daily intake of energy, macronutrients, and micronutrients was calculated as the average of the 3-day food records. After this dietary assessment, patients and their caregivers received personalized dietary counseling and recommendations to improve their identified dietary inconsistencies. However, the changes in a patient’s dietary behavior were not assessed thereafter. We modified a previous question that was used for a survey on exercise habits [22]. The patients and their caregivers were asked the following question during the interview: “Did you practice sports or physical exercise sufficient to produce sweating or shortness of breath?” Those who answered “≥2 h per week” were defined as having exercise habits. The following mandatory information on constipation symptoms was collected by the case manager: loose stools rarely present without the use of laxatives; less than three bowel movements per week; manual maneuvers necessary to facilitate defecation; hard or lumpy stools; straining during defecation; the need to use laxatives and stool pattern; the sensation of incomplete evacuation; and the sensation of anorectal obstruction. Constipation is mainly diagnosed using the Rome III criteria, according to the patient and caregiver’s report [6,22,23]. 2.6. Statistical Analysis All values were expressed as the mean ± standard deviation. The chi-square test was used to compare categorical variables. Non-parametric methods were used when continuous variables were non-normally distributed. The Mann–Whitney U tests were used to compare the differences between two groups. We chose those factors with significant differences, including the MMSE, MNA, and water intake (p < 0.05), between two groups and the factors previously reported to be associated with constipation, including age, fiber, and exercise, for the binary logistic regression analysis. Multiple binary logistic regression was used to determine the factors associated with constipation in patients with dementia. Statistical analysis was performed using the SPSS version 22.0 software package (IBM, Armonk, NY, USA). A p value of <0.05 was considered significant. 3. Results 3.1. Clinical Characteristics and Demographic Data of All Participants The age, sex, MMSE, CDR, body height and weight, BMI, waist circumference, hip circumference, exercise habits, and comorbidities of the 119 patients with dementia are listed in Table 1. Of them, 30 (25.2%) experienced constipation. The hemoglobin, total cholesterol, triglyceride, HbA1c, homocysteine, vitamin B12, and folate levels are presented in Table 2. 3.2. Nutrition Status and Diet Analysis in All Participants The daily intake analysis conducted through diet diaries was recorded as the total caloric, carbohydrate, lipid, protein, calcium, fiber, salt (sodium), and water intake amounts (Table 2). The MNA was 23.80 ± 3.45, and 52 (43.7%) patients were at risk of malnutrition. 3.3. Clinical Characteristics and Demographic Differences in Patients with Constipation We divided the patients into two groups, according to the status of constipation, and compared their basic demographic characteristics. No significant differences were found for age, gender, CDR, BMI, or the number of exercise habits between the two groups. However, MMSE was statistically higher in patients without constipation (20.4 ± 5.9) than in those with constipation (16.9 ± 7.7) (p = 0.028). The medication, which included acetylcholinesterase inhibitors (p = 0.152) and antipsychotic medications (p = 0.788), displayed no significant differences in the two groups. There were no significant changes in the clinical and demographic data, including diabetes mellitus, hypertension, coronary artery disease, hyperlipidemia, and chronic kidney disease, and biochemical data such as hemoglobin, total cholesterol, triglyceride, HbA1c, homocysteine, vitamin B12, and folate levels. MNA was statistically higher in patients without constipation (24.2 ± 3.5) than in those with constipation (22.6 ± 2.9) (p = 0.029). The number of patients at risk of malnutrition was higher in the no constipation group (60%) than in the constipation group (38.2%) (p = 0.029). In the daily intake analysis, the total caloric, carbohydrate, lipid, protein, calcium, fiber, and salt (sodium) levels were not significantly different in patients with constipation and in those without constipation (Table 3). However, the water intake was significantly lower in patients with constipation (546.81 ± 240.01) than in those without constipation (808.04 ± 404.24) (p = 0.001). 3.4. Risk Factors for Constipation in Patients with Dementia The MMSE, MNA, and water intake were significantly lower in the constipation group (p < 0.05). Therefore, we chose the MMSE, MNA and water intake, and common risk factors associated with constipation, including age, fiber, and exercise, for the analysis (Table 4). Multiple binary logistic regression was performed to determine the risk factors for constipation in patients with dementia. We found that the amount of water was the only associated risk factor for constipation in patients with dementia (p = 0.002). However, fiber was not associated with constipation (p = 0.051). 4. Discussion From a Taiwan dementia center survey that involved private in-person interviews with dietitian consultation, the prevalence of constipation symptoms (defined based on the stool consistency) (25.2%) in patients with dementia was higher than its overall prevalence. Constipation symptoms were defined based on stool consistency and frequency. Dementia patients with a lower MMSE score, risk of malnutrition, and lower water intake had a higher tendency to develop constipation. After controlling for other known factors for chronic constipation in adults, the only modifiable factor that may improve constipation was increasing the dietary intake of liquids, instead of fiber intake or exercise. Chronic constipation is a common geriatric syndrome. The prevalence rates of chronic constipation are as follows: In patients older than 60 years, 15–20% [24]; in patients older than 84 years, 20.0–37.3% [22,25]; and in patients receiving long-term care, 80% [22,25]. The mean age of our study group was 75.2 years, with a higher prevalence of constipation (25.2%) than that in normal older adults [24]. A similar study investigating constipation reported a prevalence of 24.5% in patients with Parkinson’s disease [26]. This means that chronic constipation is a frequent problem and needs to be addressed when caring for patients with dementia. In this study, the constipation group had lower MMSE scores (p < 0.05). This finding indicates that severe dementia may be associated with the risk of constipation. The correlation analysis revealed a positive correlation between dementia prevalence and constipation prevalence [27]. Based on the similarity of the prevalence distributions of these two diseases, it can be speculated that Alzheimer’s disease may be correlated with constipation, which means that either disease may share a common factor, such as a low fiber intake or decreased exercise, or one disease could contribute to the occurrence of the other disease [27]. Our study showed that patients with constipation (77.2 ± 8.3) were older than those without constipation (74.5 ± 7.4) (p = 0.090). In older adults, constipation can be the result of multiple factors, including common diseases that can cause chronic constipation, functional or organic diseases of the colorectum and anus, and drugs [28]. In patients with Parkinson’s disease, an older age and younger age of onset were associated with the incidence of constipation [26]. Although age is also an important factor, it could not be modified during the care of these patients. In addition to aging, the common risk factors associated with constipation included the following: (1) the fluid intake (daily total fluid intake >1.5 L); (2) the dietary fiber intake (>25 g/d); (3) activity (old patients, who are wheelchair-bound, who are immobile, or with impaired physical mobility); a lack of exercise for a long time; and slow intestinal peristalsis [28]. We also analyzed these three factors in our study to determine the most important factor in our patients. The third most important factor was activity. We used exercise to evaluate our patients. In our study, patients’ dementia was not severe. They had very mild dementia or mild dementia; as such, they could still express themselves well and exercise. However, there were no significant changes in exercise habits. The MNA has recently been designed and validated to provide a single, rapid assessment of the nutritional status in older adults and to identify people at risk of malnutrition [29]. MNA was statistically higher in patients without constipation (24.2 ± 3.5) than in patients with constipation (22.6 ± 2.9) (p = 0.029). The number of patients with a risk of malnutrition was higher in patients without constipation (60%) than in those with constipation (38.2%) (p = 0.029). MNA is a questionnaire used for whole-body health evaluation, including body weight change, appetite, and body figure. In our study, we found that patients at risk of malnutrition according to their MNA scores were also at risk of constipation, and this finding was similar to what was reported for those with Parkinson’ s disease [30]. An increased intake of dietary fiber is widely considered to protect against constipation, and several studies have found an inverse relationship between dietary fiber intake and constipation. Fiber is important for stool passage. However, almost all older individuals in this study were unable to achieve the standard fiber intake. Studies have indicated that a high-fiber diet can increase the stool weight, resulting in a decreased colon transit time, while a poor-fiber diet induces constipation [31]. However, a high-fiber diet could improve symptoms in patients with normal colonic transit and anorectal function, while constipated patients with delayed colonic transit did not exhibit improvement by increasing their dietary fiber [32]. We found no significant differences between patients with dementia with and without constipation in terms of fiber intake in this study. Only one patient with constipation (3.3%) consumed >25 gm per day, while seven (7.9%) without constipation consumed >25 g per day. The fiber intake was generally low in our study. However, similar to the reports of other studies [33,34,35], we were unable to find such an association. This could be due to the fact that the dietary fiber intake of most study participants was too low to have a protective effect. In our study, the water intake was significantly lower in patients with constipation (584.11 ± 277.60) than in those without constipation (788.60 ± 422.42) (p = 0.015). Furthermore, after adjusting for all possible factors, a low water intake was an independent risk factor associated with constipation in patients with dementia (p < 0.05). We further analyzed 14 patients with constipation (46.7%) who drank >500 mL and 66 (74.2%) without constipation who drank >500 mL per day (p = 0.006). A few studies have reported an association between the fluid intake and intestinal constipation. Epidemiological evidence has indicated an association between a lower fluid intake and intestinal constipation [36]. An inadequate fluid intake or excessive fluid loss due to diarrhea, vomiting, or febrile illness may cause hardening of the stool, and is considered to be an important cause of constipation, especially in infants [37]. Increasing one’s liquid intake is commonly recommended for constipated children, adults, and older adults [10,11,12,22,38,39,40]. A lower frequency of constipation among individuals with a higher fluid intake was observed (20%, 15%, or 11%, respectively) [38]. The stool frequency and stool weight were significantly decreased during the liquid deprivation week, despite the absence of changes in the mean oral–anal transit time. The effects of the fluid intake on constipation have not been fully elucidated [10,11,12,40,41]. In older adults, a low liquid intake may result in hypohydration, which often causes constipation [41]. Poor dentition, a decreased production of saliva, and dehydration, especially in the warmer months, make the problem more complex [40,41]. Further clinical trials and epidemiological studies that consider the international recommendations for fluid intake for older adults are required. The importance of an increased fluid intake was questioned by the European Society for Pediatric Gastroenterology, Hepatology, and Nutrition/North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition. A clinical trial in children reported that only an increased fluid intake with or without behavioral intervention had no significant effect [42,43]. No randomized controlled trials have evaluated the benefit of water supplementation alone in patients with constipation. However, water supplementation of 1.5–2 L per day improved the stool frequency [43] and decreased the need for laxatives [44,45,46]. Therefore, a higher water intake may be beneficial for the prevention and treatment of mild intestinal constipation. Further studies are required to better understand the role of water and fluids in the etiology and treatment of intestinal constipation in patients with dementia. The major strength of this investigation is that it is the first study to investigate the risk factor of constipation in patients with dementia who were diagnosed by two neurologists or a psychologist’s confirmation. Some risk factors were found. However, there were some limitations in this study. The first limitation of our study was the cross-sectional design of the study; we cannot infer the cause and outcome relationship. The second limitation of the study is that the incidence could be underestimated because of dementia and information from the caregiver. Third, this study did not consider the amount of water present in food, but only in the form of liquids. The fourth limitation is the dietary data collection having possible recall bias, despite the double confirmation by caregivers. The fifth limitation is that we did not measure serum osmolality for dehydration. The final limitation is the small number of participants. This indicates that a large sample size is needed to show the effect of fluid intake on constipation. In future studies, prospective randomized clinical trials with water ingestion to prevent dehydration should be performed to confirm the results. 5. Conclusions A low fluid intake was associated with constipation. An increased adequate water intake could improve constipation. However, randomized prospective clinical trials are still needed to confirm these results. Acknowledgments The authors wish to thank the patients and their caregivers for their time and commitment to this research, and all team members from the Cognitive and Aging Center for their study executive coordination. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Author Contributions Data collection and methodology, C.-L.C. and T.-M.L.; writing—original draft preparation, Y.-C.C. and N.-C.C.; writing—review and editing, N.-C.C.; data curation, H.-H.C.; data analysis, Y.-Y.L. All authors have read and agreed to the published version of the manuscript. Funding This work was supported by the grant CMRPG8F1041-3 from the Chang Gung Memorial Hospital, Taiwan. The funder had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. Conflicts of Interest The authors declare that they have no competing interests. Availability of Data and Materials The datasets generated during and/or analyzed during the current study are available from the corresponding author (Nai-Ching Chen) on reasonable request. ijerph-17-09006-t001_Table 1Table 1 Demographic and clinical characteristics of patients with dementia. All Participants (n = 119) Age, years 75.2 ± 7.7 Gender (men/women) 53/66 Mini-Mental State Examination 19.5 ± 6.6 Clinical dementia rating (0.5/1) 82/37 Body height, cm 154.3 ± 8.3 Body weight, kg 58.7 ± 10.5 Body mass index (kg/m2) 24.6 ± 3.9 Waist circumference, cm 86.2 ± 11.5 Hip circumference, cm 94.9 ± 9.7 Waist/hip ratio 0.091 ± 0.07 Exercise habit, n (%) 77 (64.7%) Comorbidity Diabetes mellitus, n (%) 38 (31.9%) Hypertension, n (%) 62 (52.1%) Hyperlipidemia, n (%) 24 (20.1%) Coronary artery disease, n (%) 19 (15.9%) Chronic kidney disease, n (%) 8 (6.7%) Constipation Patients with constipation, n (%) 30 (25.2%) Note: Mean ± standard deviation. ijerph-17-09006-t002_Table 2Table 2 Biochemical characteristics and daily intake of patients with dementia. All Participants (n = 119) Biochemistry Hemoglobin, g/dL 13.07 ± 1.83 Total cholesterol, mg/dL 184.79 ± 41.32 Triglycerides, mg/dL 119.66 ± 69.17 HbA1c, % 6.19 ± 1.62 Homocysteine, umole/L 17.03 ± 15.99 Vitamin B12, pg/mL 776.09 ± 792.91 Folate, ng/mL 11.81 ± 9.39 Mini-Nutritional Assessment 23.80 ± 3.45 Number of with risk malnutrition, n (%) 52 (43.7%) Daily intake Total caloric, kcal 1507.34 ± 586.40 Carbohydrate, as % of total energy 60.24 ± 11.98 Lipid, as % of total energy 26.38± 10.29 Protein, as % of total energy 14.21 ± 11.98 Calcium, mg 390.25 ± 265.48 Fiber, gm 13.22 ± 8.81 Salt (sodium), mg 853.29 ± 755.67 Water, mL 742.19 ± 386.01 Note: Mean ± standard deviation. Mini-Nutritional Assessment scores below 23.5 were defined as being at risk and 24–30 was defined as a normal nutritional status. ijerph-17-09006-t003_Table 3Table 3 Clinical and biochemical characteristics and the daily intake subgroup analysis. Patients with Constipation (n = 30) Patients without Constipation (n = 89) p-Value Age, years 77.2 ± 8.3 74.5 ± 7.4 0.090 Gender (M/F) 16/14 37/52 0.134 Mini-Mental State Examination 16.9 ± 7.7 20.4 ± 5.9 0.028 * Clinical dementia rating (0.5/1) 18/12 64/25 0.082 Body mass index (kg/m2) 24.8 ± 3.8 24.6 ± 4.0 0.877 Exercise habit 17 (56.7%) 60 (67.4%) 0.178 Medication Acetylcholinesterase inhibitors 14 (46.7%) 33 (37.1%) 0.152 Antipsychotic medications 2 (6.7%) 7 (7.9%) 0.788 Comorbidity Diabetes mellitus, % 12 (40%) 26(29.2%) 0.161 Hypertension, % 18 (60%) 44 (49.4%) 0.295 Hyperlipidemia, % 5 (16.7%) 19 (21.3%) 0.427 Coronary artery disease, % 6 (20%) 13 (14.6%) 0.306 Chronic kidney disease, % 2 (6.7%) 6 (6.7%) 0.630 Biochemistry Hemoglobin, g/dL 12.60 ± 1.91 13.23 ± 1.79 0.106 Total Cholesterol, mg/dL 174.55 ± 40.30 188.21 ± 41.33 0.124 Triglycerides, mg/dL 121.37 ± 81.87 119.08 ± 64.85 0.876 HbA1c, % 6.21 ± 1.20 6.18 ± 1.75 0.927 Homocysteine, umole/L 19.97 ± 9.94 15.99 ± 17.58 0.251 Vitamin B12, pg/mL 619.07 ± 457.01 830.88 ± 876.13 0.209 Folate, ng/mL 11.82 ± 10.46 11.82 ± 9.06 0.999 Mini-Nutritional Assessment 22.6 ± 2.9 24.2 ± 3.5 0.029 * Number of with risk malnutrition, n (%) 18 (60%) 34 (38.2%) 0.031 * Daily intake Total caloric, kcal 1552.80 ± 636.82 1492.02 ± 571.41 0.625 Carbohydrate, as % of total energy 61.11 ± 13.70 59.94 ± 11.41 0.678 Lipid, as % of total energy 14.23 ± 4.48 14.20 ± 4.14 0.974 Protein, as % of total energy 25.18 ± 11.53 26.69 ± 9.88 0.462 Calcium, mg 353.34 ± 249.71 402.84 ± 270.87 0.380 Fiber, gm 11.90 ± 5.99 13.67 ± 9.56 0.343 Salt (Sodium), mg 955.28 ± 1115.80 818.91 ± 592.19 0.527 Water, mL 546.81 ± 240.01 808.04 ± 404.24 0.001 * Note: Mini-Nutritional Assessment scores below 23.5 were defined as being at risk and 24–30 was defined as a normal nutritional status. A chi-square test was used to compare categorical variables. Mann–Whitney U tests were applied to compare the differences between groups. Significance was set at p < 0.05. * p < 0.05. ijerph-17-09006-t004_Table 4Table 4 Binary logistic regression models for constipation in patients with dementia. Odds Ratio 95% Confidence Interval p-Value Age 0.998 0.932–1.067 0.944 Mini-Mental State Examination (MMSE) 1.048 0.968–1.135 0.250 Water, mL 1.004 1.001–1.007 0.002 * Mini-Nutritional Assessment Score (MNA) 1.067 0.917–1.241 0.404 Fiber 1.009 0.953–1.001 0.051 Exercise (category) 0.935 0.331–2.642 0.899 Constant 0.068 0.438 Note: Multiple binary logistic regression was used to determine the factors, including age, exercise, MMSE, MNA, and water intake, associated with constipation in patients with dementia. Multiple binary logistic regression was performed by the enter method. * p < 0.05. ==== Refs References 1. Martin P. Anders W. Maëlenn G. Gemma-Claire A. Yu-Tzu W. Matthew P. World Alzheimer Report 2015: The Global Impact of Dementia: An Analysis of Prevalence, Incidence, Cost and Trends: Alzheimer’s Disease International 2015 Available online: https://www.alzint.org/resource/world-alzheimer-report-2015/ (accessed on 15 May 2020) 2. Pinquart M. Sörensen S. Differences between caregivers and noncaregivers in psychological health and physical health: A meta-analysis Psychol. Aging 2003 18 250 267 10.1037/0882-7974.18.2.250 12825775 3. Georges J. Jansen S. Jackson J. Meyrieux A. Sadowska A. Selmes M. Alzheimer’s disease in real life—The dementia carer’s survey Int. J. Geriatr. Psychiatry 2008 23 546 551 10.1002/gps.1984 18232054 4. Gallegos-Orozco J.F. Foxx-Orenstein A.E. Sterler S.M. Stoa J.M. Chronic constipation in the elderly Am. J. Gastroenterol. 2012 107 18 25 10.1038/ajg.2011.349 21989145 5. Suares N.C. Ford A.C. Prevalence of, and risk factors for, chronic idiopathic constipation in the community: Systematic review and meta-analysis Am. J. Gastroenterol. 2011 106 1582 1591 10.1038/ajg.2011.164 21606976 6. Carpenito L.J. Nursing Diagnosis: Application to Clinical Practice Lippincott Williams & Wilkins Philadelphia, PA, USA 2013 7. Sanchez M.I. Bercik P. Epidemiology and burden of chronic constipation Can. J. Gastroenterol. 2011 25 11B 15B 10.1155/2011/974573 8. Marc B. David C.A.C. Anthony G.C.S. Graham C. Vera L.B. Carlo D.L. Samuel N. Annamaria S. The Paris consensus on childhood constipation terminology (PACCT) group J. Pediatr. Gastroenterol. Nutr. 2005 40 273 275 15735478 9. Suares N.C. Ford A.C. Systematic review: The effects of fibre in the management of chronic idiopathic constipation Aliment Pharmacol. Ther. 2011 33 895 901 10.1111/j.1365-2036.2011.04602.x 21332763 10. McCrea G.L. Miaskowski C. Stotts N.A. Macera L. Varma M.G. A review of the literature on gender and age differences in the prevalence and characteristics of constipation in North America J. Pain Symptom Manag. 2009 37 737 745 10.1016/j.jpainsymman.2008.04.016 11. Talley N.J. Jones M. Nuyts G. Dubois D. Risk factors for chronic constipation based on a general practice sample Am. J. Gastroenterol. 2003 98 1107 1111 10.1111/j.1572-0241.2003.07465.x 12809835 12. Barry L.W. Kylie A.W. Lisa G.P. A longitudinal study of constipation and laxative use in a community-dwelling elderly population Arch. Gerontol. Geriatr. 2015 60 418 424 25736738 13. GWH International Statistical Classification of Diseases and Related Health Problems 10th ed. World Health Organization Geneva, Switzerland 2016 14. American Psychiatric Association Diagnostic and Statistical Manual of Mental Disorders 4th ed. APA Arlington, VA, USA 2000 15. Folstein M.F. Folstein S.E. McHugh P.R. Mini-mental state J. Psychiatr. Res. 1975 12 189 198 10.1016/0022-3956(75)90026-6 1202204 16. Morris J.C. The clinical dementia rating (CDR): Current version and scoring rules Neurology 1993 43 2412 2414 10.1212/WNL.43.11.2412-a 17. Chuang Y.C. Chuang H.Y. Lin T.K. Chang C.C. Lu C.H. Chang W.N. Chen S.D. Tan T.Y. Huang C.R. Chan S.H. Effects of long-term antiepileptic drug monotherapy on vascular risk factors and atherosclerosis Epilepsia 2012 53 120 128 10.1111/j.1528-1167.2011.03316.x 22085257 18. Tan T.Y. Lu C.H. Chuang H.Y. Lin T.K. Liou C.W. Chang W.N. Chuang Y.C. Long-term antiepileptic drug therapy contributes to the acceleration of atherosclerosis Epilepsia 2009 50 1579 1586 10.1111/j.1528-1167.2009.02024.x 19292757 19. Yu-Lung T. Chi-Ren H. Chih-Hsiang L. Yan-Ting L. Cheng-Hsien L. Nai-Ching C. Chiung-Chih C. Wen-Neng C. Yao-Chung C. Risk factors of hyperammonemia in patients with epilepsy under valproic acid therapy Medicine 2014 93 e66 25192484 20. Guigoz Y. The mini nutritional assessment (MNA) review of the literature—What does it tell us? J. Nutr. Health Aging 2006 10 466 485 17183419 21. Taiwan Food and Drug Administration Available online: https://consumer.fda.gov.tw/Food/TFND.aspx?nodeID=178 (accessed on 15 May 2019) 22. Akune T. Muraki S. Oka H. Tanaka S. Kawaguchi H. Nakamura K. Yoshimura N. Exercise habits during middle age are associated with lower prevalence of sarcopenia: The ROAD study Osteoporos. Int. 2014 25 1081 1088 10.1007/s00198-013-2550-z 24146097 23. Shih D.Q. Kwan L.Y. All roads lead to Rome: Update on Rome III criteria and new treatment options Gastroenterol. Rep. 2007 1 56 65 21544252 24. Chu H. Zhong L. Li H. Zhang X. Zhang J. Hou X. Epidemiology characteristics of constipation for general population, pediatric population, and elderly population in China Gastroent. Res. Pract. 2014 2014 532734 10.1155/2014/532734 25. Fleming V. Wade W.E. A review of laxative therapies for treatment of chronic constipation in older adults Am. J. Geriatr. Pharmacother. 2010 8 514 550 10.1016/S1543-5946(10)80003-0 21356503 26. Yu Q.J. Yu S.Y. Zuo L.J. Lian T.H. Hu Y. Wang R.D. Piao Y.S. Guo P. Liu L. Jin Z. Parkinson disease with constipation: Clinical features and relevant factors Sci. Rep. 2018 8 567 10.1038/s41598-017-16790-8 29330419 27. Zhang T. Han Y.R. Wang J.Y. Hou D. Deng H. Deng Y.L. Song Z. Comparative epidemiological investigation of Alzheimer’s disease and colorectal cancer: The possible role of gastrointestinal conditions in the pathogenesis of AD Front Aging Neurosci. 2018 10 176 10.3389/fnagi.2018.00176 30323761 28. Zheng S. Yao J. Expert consensus on the assessment and treatment of chronic constipation in the elderly Aging Med. 2018 1 8 17 10.1002/agm2.12013 31942474 29. Vellas B. Guigoz Y. Garry P.J. Nourhashemi F. Bennahum D. Lauque S. Albarede J.L. The mini nutritional assessment (MNA) and its use in grading the nutritional state of elderly patients Nutrition 1999 15 116 122 10.1016/S0899-9007(98)00171-3 9990575 30. Paul B.S. Singh T. Paul G. Jain D. Singh G. Kaushal S. China R.S. Prevalence of malnutrition in Parkinson’s disease and correlation with gastrointestinal symptoms Ann. Indian Acad. Neurol. 2019 22 447 452 10.4103/aian.AIAN_349_18 31736567 31. Tucker D.M. Sandstead H.H. Logan G.M.J. Klevay L.M. Mahalko J. Johnson L.K. Inman L. Inglett G.E. Dietary fiber and personality factors as determinants of stool output Gastroenterology 1981 81 879 883 10.1016/S0016-5085(81)80112-6 6269944 32. Voderholzer W.A. Schatke W. Mühldorfer B.E. Klauser A.G. Birkner B. Müller-Lissner S.A. Clinical response to dietary fiber treatment of chronic constipation Am. J. Gastroenterol. 1997 92 95 98 8995945 33. Campbell A.J. Busby W.J. Horwath C.C. Factors associated with constipation in a community-based sample of people aged 70 years and over J. Epidemiol. Community Health 1993 47 23 26 10.1136/jech.47.1.23 8382251 34. Towers A.L. Burgio K.L. Locher J.L. Merkel I.S. Safaeian M. Wald A. Constipation in the elderly: Influence of dietary, psychological, and physiological factors J. Am. Geriatr. Soc. 1994 42 701 706 10.1111/j.1532-5415.1994.tb06527.x 8014342 35. Murakami K. Okubo H. Sasaki S. Dietary intake in relation to self-reported constipation among Japanese women aged 18–20 years Eur. J. Clin. Nutr. 2006 60 650 657 10.1038/sj.ejcn.1602365 16340942 36. Boilesen S.N. Tahan S. Dias F.C. Melli L.C.F.L. Morais M.B.D. Water and fluid intake in the prevention and treatment of functional constipation in children and adolescents: Is there evidence? J. Pediatr. 2017 93 320 327 10.1016/j.jped.2017.01.005 28450053 37. Leung A.K. Chan P.Y. Cho H.Y. Constipation in children Am. Fam. Physician. 1996 54 611 618 8701840 38. Lindeman R.D. Romero L.J. Liang, H.C.; Baumgartner, R.N.; Koehler, K.M. Garry P.J. Do elderly persons need to be encouraged to drink more fluids? J. Gerontol. A Biol. Sci. Med. Sci. 2000 55 M361 M365 10.1093/gerona/55.7.M361 10898251 39. Tremaine W.J. Chronic constipation: Causes and management Hosp. Pract. 1990 25 89 92 40. Young R.J. Beerman L.E. Vanderhoof J.A. Increasing oral fluids in chronic constipation in children Gastroenterol. Nurs. 1998 21 156 161 10.1097/00001610-199807000-00002 9849179 41. Desforges J.F. Wrenn K. Fecal impaction N. Engl. J. Med. 1989 321 658 662 10.1056/NEJM198909073211007 2671728 42. Kuhl E.S. Barbara T.F. Patton S.R. Brief report: Adherence to fluid recommendation in children receiving treatment for retentive encopresis J. Pediatr. Psychol. 2009 34 1165 1169 10.1093/jpepsy/jsp017 19304779 43. Kuhl E.S. Hoodin F. Rice J. Felt B.T. Rausch J.R. Patton S.R. Increasing daily water intake and fluid adherence in children receiving treatment for retentive encopresis J. Pediatr. Psychol. 2010 35 1144 1151 10.1093/jpepsy/jsq033 20439348 44. Anti M. Pignataro G. Armuzzi A. Valenti A. Iascone E. Marmo R. Lamazza A. Pretaroli A.R. Pace V. Leo P. Water supplementation enhances the effect of high-fiber diet on stool frequency and laxative consumption in adult patients with functional constipation Hepatogastroenterology 1998 45 727 732 9684123 45. Rodrigues-Fisher L. Bourguignon C. Good B.V. Dietary fiber nursing intervention Clin. Nurs. Res. 1993 2 464 477 10.1177/105477389300200408 8220199 46. Hope A.K. Down E.C. Dietary fibre and fluid in the control of constipation in a nursing home population Med. J. Aust. 1986 144 306 307 10.5694/j.1326-5377.1986.tb128380.x 3012298