Related Experiment Video
Updated: May 26, 2026

A Quantitative Sensory Testing Paradigm to Obtain Measures of Pain Processing in Patients Undergoing Breast Cancer Surgery
Published on: January 18, 2018
Changes in perceived pain severity following interdisciplinary treatment for chronic pain
John Kowal1, Keith G Wilson, Celia M Geck
1The Ottawa Hospital Rehabilitation Centre, Ottawa, Ontario, Canada. jkowal@ottawahospital.on.ca
Background:
There is good support for the effectiveness of interdisciplinary chronic pain management programs in improving functional outcomes; however, relatively little is known about patients who report deterioration following participation in such programs.
Objectives:
The present retrospective study investigated patients' reports of increased pain severity during participation in a cognitive-behaviourally oriented, outpatient treatment for chronic pain.
Methods:
Participants (n=280) completed a four-week, group-based, interdisciplinary chronic pain self-management program at a rehabilitation hospital. They completed pre- and post-treatment questionnaires, which included global change ratings of pain severity and clinically-relevant measures, including pain intensity ratings, functional limitations, pain catastrophizing and self-efficacy.
Results:
Statistically significant pre-post improvements were observed for all study variables. Almost all patients reported global improvement overall. Nevertheless, a subset of patients (n=99) reported increased pain severity on global ratings. These individuals were characterized by lower self-efficacy at baseline.
Conclusions:
Participants endorsed significant pre- and post-treatment improvements in all domains. Nevertheless, some participants reported deterioration. The findings shed light on variables associated with negative treatment outcomes and have practical applications for interdisciplinary chronic pain management programs.

