Readiness to adopt a self-management approach to pain--are profiles of subscale scores on the Pain Stages of Change Questionnaire useful?

The study evaluated the ability of the Pain Stages of Change Questionnaire (PSOCQ) to classify subjects into specific profiles of readiness to adopt a self-management approach to pain. An analysis was made of whether the five earlier described PSOCQ-profiles Precontemplation, Contemplation, Non-contemplative Action, Participation and Ambivalent could be reproduced by two different methods, cluster analysis and visual analysis. The 184 included subjects completed the PSOCQ, the Hopkins Symptom Checklist (HSCL-25), the Tampa scale of Kinesiophobia (TSK) and five self-efficacy questions from the arthritis self-efficacy questionnaire (ASES). Profiles were drawn based on the mean scores of the four subscales in PSOCQ. All the five predefined profiles were identified visually by two coders with an interrater agreement of Kappa 0.731. A 6-cluster solution generated the four profiles Precontemplation, Contemplation, Non-contemplative Action and Participation. Discriminant function analysis (DFA) on cluster analysis classified 83.5% of cases in the same group, and DFA on visual classification 72.1% of cases. Fifty-three percent were classified in the same profile by cluster and visual analysis. The two profiles Precontemplation and Participation seem to identify distinct subgroups that differ in educational level, pain during activity and psychometric measures. Non-contemplative Action share characteristics with Precontemplation, and the Contemplation group has scores in between. In conclusion, more research on the validity of the PSOCQ is needed. Outcome studies after pain treatment programmes could focus three main states that differ on measures for concurrent validity: Profiles that can be identified as Precontemplation or Non-contemplative action, Contemplators, and subjects with Participation profiles.