Prevalence and impact of constipation and bowel dysfunction induced by strong opioids: a cross-sectional survey of 520 patients with cancer pain: DYONISOS study

Abstract

Objective:

To describe the prevalence of opioid-induced constipation (OIC) in patients with cancer pain according to the Knowles-Eccersley-Scott symptom score (KESS), the different symptoms of opioid-induced bowel dysfunction (OIBD), and to assess the impact of OIBD on patient’s quality-of-life.

Methods:

A cross-sectional observational study, using the KESS questionnaire and the physician’s subjective assessment of constipation, and other questionnaires and questions on constipation, OIBD, and quality-of-life, carried out on 1 day at oncology day centres and hospitals.

Results:

Five hundred and twenty patients were enrolled at 77 centres in France; 61.7% of patients (n?=?321) showed a degree of constipation that is problematic for the patient according to KESS (between 9–39). Even more patients, 85.7% (n?=?438), were considered constipated according to the physician’s subjective assessment—despite laxative use (84.7% of patients). Quality-of-life was significantly reduced in constipated vs non-constipated patients for both PAC-QoL (p?Key limitations:

This cross-sectional study, in a selected population of cancer patients, has measured prevalence and impact of OIBD. Further confirmation could be sought through the use of longitudinal studies, and larger populations, such as non-cancer pain patients treated with opioids

Conclusions:

Cancer patients taking opioids for pain are very frequently constipated, even if they are prescribed laxatives. This leads to relevant impairments of quality-of-life.