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. Author manuscript; available in PMC: 2019 May 1.
Published in final edited form as: Scand J Work Environ Health. 2018 Aug 12;44(6):557–567. doi: 10.5271/sjweh.3762

Table 2.

Summary of reported return to work times according to methodological characteristics.

Subgroup Studies Observations A Return to work time reported as median (days)
Studies Observations A Return to work time reported as mean (days)
Median Range Median Range
All studies 19 35 28 7-60 41 81 30 4-168

Study
    Randomised controlled trials 11 24 26 7-59 11 23 25 12-84
    Observational study 8 11 35 21.5-60 30 58 36 4-168

CTR procedure
    Open CTR 15 21 34 14-60 29 44 29.5 4-85
    Endoscopic CTR 9 10 18.75 7-51 21 28 22 12-92
    Procedure not reported 3 4 35 26.5-41 6 10 119.5 31-168

Sample size
    <30 workers 7 14 23.25 7-59 17 28 29 4-126
    30-100 workers 9 15 28 14-46.5 24 40 31 6-168
    >100 workers 4 6 38 27-60 9 13 44 15-140

Source of return to work data
    Regional or national databases 3 8 34.5 27-51 3 8 57 28-85
    Questionnaires or interviews 4 5 53 35-60 9 14 23 4-92
    Medical records 3 4 22.25 14-28 15 32 36 6-160
    Not reported 7 14 23 14-46.5 14 27 22 6-168

Location
    Scandinavia 8 18 30 7-51 5 10 34.5 17-84
    Europe (excluding Scandinavia) 4 6 19.5 14-60 12 21 26 15-57
    North America 8 13 28 13-59 22 44 37 4-168
    Other - - - - 3 6 21.5 9-49

Risk of bias
    Low (all studies) 3 7 37 28-51 2 6 48 28-84
    Moderate (observational studies) 4 5 34 13-60 12 21 57 9-160
    Unclear (randomised controlled trials) 5 10 19.25 7-28 9 17 24 15-43
    High/serious/critical (all studies) 7 13 38 14-59 18 37 29 4-168
A

Number of study arms;

B

any reported health insurance including national and personal schemes. For each summary calculation, the number of studies and observations (study arms) are reported. Summary data was not weighted for sample size.