Development and validation of the Pain-Induced Comfort Eating Scale in a chronic pain sample.

Background: Chronic pain and higher body weight frequently co-occur. This common comorbidity is thought to be mediated by the use of comfort eating as a strategy for managing both the physical and psychological pain and discomfort associated with flare-ups of chronic pain. Valid and reliable assessment tools are needed to inform the development of effective treatments.

Aims: This study aimed to assess the psychometric properties of a new brief measure of pain-induced comfort eating in chronic pain, the Pain-Induced Comfort Eating Scale (PICES).

Methods: A sample of 166 patients with chronic pain completed an online test battery including the PICES along with measures of chronic pain and pain-related symptoms, disordered eating, and related psychological factors.

Results: Results of exploratory factor analysis revealed a single-factor model for the four-item PICES. Further, the PICES demonstrated evidence of good internal consistency as well as convergent validity with demonstrated correlations with related measures. The results of this study also revealed that comfort eating in chronic pain appears to be related to psychological distress; the PICES correlated more strongly with measures assessing mood and psychological distress compared to interference/intensity of physical pain itself. Scores on the PICES also correlated strongly with measures of uncontrolled and emotional eating.

Conclusions: Overall, our results indicate that the PICES provides a valid and useful brief measure of comfort eating in chronic pain that might be useful to inform treatments targeting the comorbid disordered eating practices that can lead to higher body weights in patients with chronic pain.