Validity and reliability of the patient assessment of constipation quality of life questionnaire for the Turkish population

Abstract

Background/Aims: There are few specific evaluation forms for evaluating the quality of life among patients with chronic constipation. Our study aimed to determine the validity and reliability of the translated Patient Assessment of Constipation Quality of Life (PAC-QOL) questionnaire for the Turkish population because evidence of its reliability and validity is required to justify its use in other studies and clinical practice. Materials and Methods: This study included 154 patients with constipation who were treated at the Department of Gastroenterology, Dokuz Eylül University Hospital between January and June 2012. The translated PAC-QOL questionnaire was completed by patients at the clinic and also at a 2-week follow-up to test its reliability. Results: Cronbach's alpha coefficient (internal consistency) was 0.91 (good) for the translated PAC-QOL questionnaire. Time validity was evaluated using the intraclass correlation coefficient (ICC) method, and the ICC value for all questions was confirmed as 0.68 at the 2-week follow-up. The validity of the tool in the study group was evaluated using factor analysis, and the results were highly significant (Kaiser-Meyer-Olkin value: 0.857; Bartlett's test: p=0.001). Questions were categorized according to six factors based on the factor analysis, and these factors explained 65.1% of the total variation. For hypothesis verification of the tool, the correlation coefficient for PAC-QOL and PAC Symptoms (PAC-SYM) was r=0.577 (p<0.001), whereas the correlation coefficient for PAC-QOL and constipation severity score was r=0.457 (p<0.001). Conclusion: The PAC-QOL questionnaire was reliable, although not valid because of the limited sample group.

Effects of a proposed physical activity and diet control to manage constipation in middle-aged obese women

“…The assessment procedures performed before and after 12 weeks of intervention consisted of the following: The Patient Assessment of Constipation – Symptom (PAC-SYM) is a reliable and valid 22 , 23 tool to measure the patient’s perspective of constipation symptoms in terms of the frequency and severity. It is a 12-item self-reported measure, which is divided into three manifestation sub-scales (ie, abdominal, rectal, and stool).…”

Cross cultural comparison of constipation profiles at tertiary care centers between India and USA

“…Thirdly, PACSYM and CRQOL questionnaires have not been validated in Indian subjects with constipation. However, PACSYM and disease‐specific QOL tools such as PAC‐QOL has been successfully used in other Asian countries such as Turkey and China . As the clinical and psychosomatic profile of patients utilizing healthcare for CC might be different from those with CC in community, our study findings might not represent the individuals with CC in general population.…”

Patient assessment of constipation quality of life questionnaire: validity and reliability for Indonesian population

“…The test-retest reliability of the overall score was also good (0.865), which was similar to the original study (0.82) and higher than the validation study performed in Turkey (0.687). 4,5 However, the satisfaction domain only had moderate reliability (0.526). This pattern was also seen across the original and studies from Turkey, Japan, and Persia.5⁻⁹ One of the possible reasons was that after the time interval between completion of the first and second questionnaires, the persistence of the symptom without any intervention could lead to more dissatisfaction from the subjects.…”