45 and 46 Whether an FCE-related interview alone may be an option for FCE tests to predict future WC in patients with WADs is unknown.47 Since participants were referred because of insufficient recovery, malingering and secondary gain might be an issue. In FCE testing, malingering and secondary gain may be linked to submaximal performance

during the FCE test.48 Submaximal effort can be assessed reliably, and there is evidence that submaximal effort can be determined validly.18 and 49 In addition, in future studies, the influence of workplace accommodation or familial support should be studied. Strengths of this study are the range of known predictive variables consisting of self-reported measures, functional capacity tests, and insurance data, and a complete dataset of the outcome variable with 5 measurements over a period of 12 months.32 and 50 Within the analytical approach we controlled for confounders and Trichostatin A chemical structure interactions. The

participants, patients, and assessors of WC were blinded to the study hypotheses.8 Limitations are that the results of the FCE tests were see more accessible for the treating general practitioner, case manager, physiotherapist, and occupational physician and may have influenced their rating. Cointerventions during the time between 6 and 52 weeks were not controlled for, nor was type of work, which may be an important confounder for RTW and WC. The accuracy of self-reported measures for disability within a workers’ compensation environment can be unreliable.51 and 52 However, the

alternative (WC) also has shortcomings; its psychometric properties are unknown, and WC is often reliant on patient reports and physician interpretations.53 WC expressed as a percentage of workability of preinjury work is directly related to compensation costs and reflects the proportion of work loss to the employer, the employee, and the insurance. Therefore, this method of WC determination may Tenofovir be less subject to distortion compared with self-reported measures of WC. Nevertheless, this has not been studied yet. In light of the socioeconomic relevance of WC determination, there is an urgent need to validate currently used methods or validate new methods of WC determination. Finally, replication studies are needed because the results differ in other populations, contexts, and with other FCE procedures. FCE tests performed within 6 to 12 weeks after WADs injury grades I and II are associated with WC at baseline but do not predict future WC, whereas time course, mother language, WC at baseline, and self-reported disability do predict future WC. Additionally, the interaction between time course, WC at baseline, and self-reported disability mediated future WC. a. IBM Corp, 1 New Orchard Rd, Armonk, NY 10504-1722. We thank the physiotherapists and the physicians of the Department of Work Rehabilitation, Rehaklinik Bellikon, who participated in this study.