Characteristics of outcomes.

RTW = return to work, PROs = patient reported outcomes, n.r. = not reported.
Data source: 1administrative data,
2diary, interview, or survey, 3combination of diary or interview and administrative data,
4not reported.
5SD not reported. We imputed missing standard deviations (SDs) with the weighted average of the SDs of the remaining trials.
6Hazard ratio estimated from log-rank test.
7From personal correspondence.
8Data extracted from graph.
9Time between a claimant’s initial evaluation by a case manager (not randomization) and RTW.
10Missing or unclear number of participants.
11Cessation of disability benefits as surrogate for RTW (Rossignol, Feuerstein).
12Data presented for two subgroups (immigrant and swedes) which we recombined. Only the number of patients who started the intervention reported. To prevent attrition bias at 60 month, we used 18 month data (ensuring a slightly longer follow up than other studies) and conducted sensitivity analysis using 15 or 12 months.
13Data in graph conflicting with text or table.
14RTW for at least 2, 6 or 13 weeks reported. We disregarded the 13 weeks outcome which most participants could not achieve due to short follow-up. To ensure longest follow-up, we used 2 weeks and conducted sensitivity analysis using 6 weeks.
15Data presented in groups, variance not estimable.
16Full-time and part-time RTW reported separately. We used full time RTW and conducted sensitivity analyses using part-time combined with full-time.
17End scores.
18Change scores.