Age differences in patients evaluated for constipation: constipation characteristics, symptoms, and bowel and dietary habits.

PURPOSE: The purpose of this study was to determine the influence of age on various characteristics of constipation. We also sought to determine if age, comorbid conditions, and specific clinical characteristics such as use of pain medications were associated with an increase in the frequency of constipation-associated symptoms. SUBJECTS AND SETTING: The sample comprised 518 patients 18 years or older with a primary diagnosis of constipation. Subjects were drawn from the clinical database of all patients (n = 1228) referred from primary care or gastroenterology practices to the University of California, San Francisco Center for Pelvic Physiology between March 2003 and October 2007. DESIGN: Cross-sectional study. INSTRUMENTS: Patients completed 2 questionnaires. The clinical questionnaire obtained information on demographic characteristics and previous medical history. A second, investigator-developed questionnaire provided data about characteristics of constipation, symptoms of constipation, as well as various bowel and dietary habits. RESULTS: : Both younger and middle-aged patients were more than twice as likely as older patients to have infrequent bowel movements and abdominal bloating and to use position changes to facilitate bowel evacuations. In addition, younger patients were nearly 3 times as likely to report abdominal pain as older patients. Patients with constipation who present at a younger age report a higher frequency of certain characteristics, symptoms, and bowel habits. CONCLUSIONS: Screening of younger patients for this common problem is warranted.

A valid and reliable measure of constipation-related quality of life.

PURPOSE: Few existing measures assess constipation-specific quality of life. This study sought to develop a valid and reliable quality-of-life measure for constipation. METHODS: First, we created a preliminary instrument that assessed quality-of-life domains affected by constipation: body image, eating, mood, and relationships with others. We conducted focus groups both with patients with constipation seeking treatment and the health care providers who treat them. Next, a 59-item questionnaire was given to 240 subjects with constipation (83% female) and 103 healthy volunteers (63% female). Test-retest reliability and discriminant, convergent, and divergent validity were assessed. RESULTS: Exploratory factor analysis revealed four domains: Social Impairment (five items), Distress (six items), Eating Habits (three items), and Bathroom Attitudes (four items). Internal consistency and test-retest reliability for all subscales was high (Cronbach's alpha = 0.89; intraclass correlation coefficient = 0.87). All domains discriminated well between subjects with constipation and healthy volunteers (P < 0.001). Convergent validity was excellent: all subscales correlated highly with the Irritable Bowel Syndrome Quality of Life Scale total score (P < 0.001) and the Medical Outcomes Study Short Form-36 physical component and mental component summary scores (P < 0.001). Scores from our Constipation-Related Quality of Life measure were not significantly correlated with the Social Desirability Scale, demonstrating divergent validity. CONCLUSIONS: Our findings support the reliability and validity of the Constipation-Related Quality of Life measure. Future validation of the Constipation-Related Quality of Life measure for assessing changes in quality of life in response to treatments for constipation is needed.

Gender differences in self-reported constipation characteristics, symptoms, and bowel and dietary habits among patients attending a specialty clinic for constipation.

OBJECTIVES: This study assessed gender differences in the frequency of various characteristics of constipation, constipation-specific symptoms, and bowel and dietary habits, as well as the effects of independent but associated risk factors. METHODS: A cross-sectional study of patients aged >or=18 years with a primary diagnosis of constipation (ie, constipation, slow-transit constipation, outlet dysfunction constipation) was conducted at a tertiary referral center; patients were excluded if they had a primary diagnosis of fecal incontinence. Patients completed both a clinical questionnaire to obtain information on demographic characteristics and medical history and an unvalidated self-report questionnaire relating to the characteristics and symptoms of constipation as well as various bowel and dietary habits. Likert scales were used to assess 4 characteristics of constipation (frequency of constipation, duration of constipation symptoms of >or=1 month, bowel movement frequency, stool consistency) and the frequency of occurrence of 6 constipation symptoms (abdominal pain, abdominal bloating, incomplete evacuation, unsuccessful attempts at evacuation, pain with evacuation, straining with evacuation). The bowel habits that were evaluated included time spent at each evacuation; frequency of needing to change position to evacuate; use of anal digitation to evacuate; and the use of laxatives, enemas, stool softeners, foods, drinks, or other aids. The dietary habits that were evaluated included use of dietary fiber, use of fiber supplements, and water intake. RESULTS: Of the 518 patients, the majority were female (79.0%), white (76.3%), and employed (62.0%), with a mean (SD) age of 52.4 (16.5) years (range, 18.6-91.5 years). After controlling for a number of related conditions, women were more likely than men to have infrequent bowel movements (adjusted odds ratio [AOR] = 2.97; 95% CI, 1.67-5.28), abnormal stool consistency (ie, hard or pelletlike stools) (AOR = 3.08; 95% CI, 1.80-5.28), and a longer duration of constipation symptoms (AOR = 2.00; 95% CI, 1.05-3.82). In addition, women were more likely to report an increased frequency of occurrence of abdominal pain (AOR = 2.22; 95% CI, 1.22-4.05), bloating (AOR = 2.65; 95% CI, 1.50-4.70), unsuccessful attempts at evacuation (AOR = 1.74; 95% CI, 1.01-3.00), and the use of anal digitation to evacuate stool (AOR = 3.37; 95% CI, 1.15-9.90). CONCLUSIONS: The women in this specialty-based clinic study experienced a number of constipation symptoms and abnormal bowel habits more frequently than did men. These findings warrant replication in both population- and specialty clinic-based samples. In addition, the physiologic mechanisms that underlie these gender differences warrant investigation.

A review of the literature on gender and age differences in the prevalence and characteristics of constipation in North America.

Constipation is a common problem and affects between 2% and 28% of the general population. It is thought to affect more women than men. The severity of constipation is variable and it can be an acute or chronic condition. Often, it requires frequent interventions that may produce mixed or even unsatisfactory results. Knowledge of potentially gender- and age-related differences in constipation would be useful to clinicians to help them identify high-risk patients. In addition, researchers might use this information to design both descriptive and intervention studies. This article reviews the evidence from the studies on gender and age differences in prevalence of constipation, gender differences in the prevalence and characteristics of constipation, and age differences in the prevalence and characteristics of constipation. The available literature suggests that the prevalence of constipation is consistently higher in women than in men. However, evidence of gender differences in the characteristics of constipation is inconsistent. Prevalence rates appear to increase gradually after the age of 50 years, with the largest increase after the age of 70 years. The literature is both sparse and inconsistent in its description of age differences in the characteristics of constipation. This lack of research is a significant issue given the magnitude of this problem in the older adult population. Research is needed on gender and age differences in the symptoms of constipation, and how covariates impact the prevalence and severity of constipation in the elderly.

Pathophysiology of constipation in the older adult.

This review provides information on the definition of constipation, normal continence and defecation and a description of the pathophysiologic mechanisms of constipation. In addition, changes in the anatomy and physiology of the lower gastrointestinal tract associated with aging that may contribute to constipation are described. MEDLINE (1966-2007) and CINAHL (1980-2007) were searched. The following MeSH terms were used: constipation/etiology OR constipation/physiology OR constipation/physiopathology) AND (age factors OR aged OR older OR 80 and over OR middle age). Constipation is not well defined in the literature. While self-reported constipation increases with age, findings from a limited number of clinical studies that utilized objective measures do not support this association. Dysmotility and pelvic floor dysfunction are important mechanisms associated with constipation. Changes in GI function associated with aging appear to be relatively subtle based on a limited amount of conflicting data. Additional research is warranted on the effects of aging on GI function, as well as on the timing of these changes.

The constipation severity instrument: a validated measure.

PURPOSE: This study was designed to develop and test the validity and reliability of the Constipation Severity Instrument. METHODS: Scale development was conducted in two stages: 1) 74 items were generated through a literature review and focus groups of constipated patients and medical providers; and 2) a preliminary instrument was administered to 191 constipated patients and 103 healthy volunteers. Test-retest reliability of the constipated group was assessed (N=90). Content, convergent, divergent, and discriminant validity were evaluated by using other validated measures by performing one-way analysis of variance and Pearson correlations. RESULTS: Exploratory and confirmatory factor analysis revealed three subscales: obstructive defecation, colonic inertia, and pain. Internal consistency (alpha=0.88-0.91) and test-retest reliability (intraclass correlation coefficients=0.84-0.91) were high for all subscales. Constipated patients were grouped by Rome II criteria: functional constipation (22 percent), pelvic floor dyssynergia (15 percent), constipation predominant irritable bowel syndrome (23 percent), and no specific criteria (40 percent). Those with constipation predominant irritable bowel syndrome or pelvic floor dyssynergia scored higher on the Obstructive Defecation and Colonic Inertia subscales than those with functional constipation or no specific criteria (P=0.001-0.058). Subjects with functional constipation had much lower scores on the pain subscale than constipation predominant irritable bowel syndrome, functional constipation, or no specific criteria (P<0.009). The Constipation Severity Instrument subscale and total score correlated very highly with the subscales and total score of the Patient Assessment of Constipation Symptom measure. The Constipation Severity Instrument subscales discriminated well between constipated patients and healthy volunteers (P<0.001) and demonstrated excellent divergent validity. Higher Constipation Severity Instrument scores inversely correlated with general quality of life. CONCLUSIONS: The Constipation Severity Instrument is a reliable and valid instrument for assessing constipated patients. Administration of the Constipation Severity Instrument to other constipated patients will further validate its use.