Validation of the Work Role Functioning Questionnaire 2.0 in cancer patients

Abstract

Abstract Objective The Work Role Functioning Questionnaire 2.0 (WRFQ), measuring the percentage of time a worker has difficulties in meeting the work demands for a given health state, has shown strong reliability and validity in various populations with different chronic conditions. The present study aims to validate the WRFQ in working cancer patients. Methods A validation study of the WRFQ 2.0 was conducted, using baseline data from the longitudinal Work Life after Cancer study. Structural validity (Confirmatory Factor Analysis, CFA), internal consistency (Cronbach s alpha) and discriminant validity (hypothesis testing) were evaluated. Results 352 working cancer patients, most of them diagnosed with breast cancer (48%) and 58% in a job with mainly non‐manual tasks, showed a mean WRFQ score of 78.6 (SD = 17.1), which means that they had on average difficulties for 78.6% of the time they spent working. Good internal consistency (α = 0.96) and acceptable to good fit for both the four and five‐factor model (CFA) was found. The WRFQ distinguished between cancer patients reporting good vs. poor health (80.3 vs. 73.0, p = 0.001), low vs. high fatigue (82.0 vs. 72.2, p < 0.001), no vs. clinical depression (80.4 vs. 58.8, p < 0.001) and low vs. high cognitive symptoms (86.1 vs. 64.7, p < 0.001). Conclusions The WRFQ 2.0 is a reliable and valid instrument to measure work functioning in working cancer patients. Further psychometric research on responsiveness is needed to support its use in health practice.