DOES A VOCATIONAL ADVICE SERVICE LOCATED IN PRIMARY CARE IMPROVE WORK OUTCOMES IN PATIENTS WITH MUSCULOSKELETAL PAIN? THE SWAP (STUDY OF WORK AND PAIN) CLUSTER RANDOMISED TRIAL (ISRCTN 52269669)

IntroductionEarly intervention is advocated to prevent long-term work absence due to musculoskeletal (MSK) pain. The SWAP trial tested whether adding a vocational advice (VA) service to best current care led to fewer days work absence over 4 months.MethodsThe SWAP trial was a cluster randomised controlled trial in 6 general practices, 3 randomised to best current care (control), 3 randomised to best current care and the VA service (intervention). Patients were ≥18 years, absent from work ≤6 months or struggling at work due to MSK pain. Primary outcome was number of days absent over 4 months. Exploratory subgroup analyses examined whether the effect was larger for patients with spinal pain compared to other MSK pain.Results338 participants (158 intervention, 180 control) were recruited with 79% followed-up at 4 months. Participants in the intervention arm had significantly fewer days absent over 4 months (mean 9.3 days, SD 21.7) compared with control (mean 14.4 days, SD 27.7); adjusted incidence rate ratio...