Table 2

Adjusted quantile regression for differences in time-loss days until full sustainable RTW 1 year after the first time-loss day*

Outcome=full sustainable RTW 1 year after the first time-loss day (n=24 988)Outcome=sustainable GRTW OR full sustainable RTW 1 year after the first time-loss day (n=24 988)
Calendar days off work for workers without GRTW† (95% CI)Coefficient—additional calendar days off work for workers with GRTW (95% CI)Calendar days off work for workers without GRTW (95% CI)Coefficient—additional calendar days off work for workers with GRTW (95% CI)
10th44.63 (43.86 to 45.39)21.76 (20.67 to 22.84)10th44.15 (43.44 to 44.86)11.51 (10.50 to 12.52)
20th57.77 (56.68 to 58.86)24.75 (23.20 to 26.29)20th57.10 (56.07 to 58.13)13.68 (12.21 to 15.14)
30th74.24 (72.69 to 75.80)26.32 (24.11 to 28.52)30th73.01 (71.62 to 74.40)12.66 (10.68 to 14.64)
40th96.10 (93.86 to 98.35)25.87 (22.68 to 29.05)40th94.20 (92.35 to 96.06)9.48 (6.86 to 12.11)
50th128.06 (124.79 to 131.34)24.55 (19.91 to 29.20)50th123.81 (120.97 to 126.66)2.68 (−1.36 to 6.72)
60th185.53 (179.58 to 191.47)13.26 (4.82 to 21.69)60th177.87 (172.85 to 182.89)−21.52 (−28.65 to −14.40)
70th284.27 (275.24 to 293.31)−9.35 (−22.18 to 3.47)70th285.62 (179.42 to 291.83)−85.73 (−94.54 to −76.93)
80th348.79 (347.70 to 349.88)0 (−1.54 to 1.54)80th350.50 (345.74 to 355.26)−82.00 (−88.75 to −75.25)
90th365.00 (365.00 to 365.00)0 (0 to 0)‡90th365 (364.93 to 365.07)0 (−0.1 to 0.09)
  • The regression coefficients represent the difference in days relative to the number of disability days for the workers without GRTW by 10 percentiles of the distribution.

  • *Adjusted for: MSD, age, wage, gender, occupation, prior claims, firm size, industry sector, claim year, use of opioids, NSAIDs and SMRs within 30 days post claim.

  • †Adjusted prediction of cumulative time-loss days when all other variables are set at the sample means.

  • ‡Zero value caused by censoring of the data at 365 days.

  • GRTW, gradual return to work; MSD, musculoskeletal disorder; NSAIDs, non-steroidal anti-inflammatory drugs; RTW, return to work.