UC | UC+MI | UC+SVAI | |||||||
n | Mean (SD) | Median (95% CI) | n | Mean (SD) | Median (95% CI) | n | Mean (SD) | Median (95% CI) | |
ITT | 171 | 66 (41) | 62 (52–71) | 169 | 59 (41) | 56 (43–70) | 169 | 57* (38) | 49* (38–60) |
Low/medium-risk group | 135 | 63 (41) | 58 (48–69) | 133 | 55 (41) | 45 (29–61) | 134 | 55 (37) | 48 (37–59) |
High-risk group | 36 | 76 (40) | 79 (60–97) | 36 | 73 (42) | 71 (52–90) | 35 | 66 (40) | 61 (33–90) |
Sensitivity analysis 1 | 137 | 66 (41) | 62 (49–74) | 139 | 58 (41) | 57 (43–71) | 132 | 58 (39) | 53 (41–65) |
Sensitivity analysis 2 | 163 | 68 (40) | 65 (57–74) | 158 | 62 (41) | 59 (47–71) | 154 | 59 (37) | 54 (43–65) |
ITT, intention-to-treat analysis (five missing: three in UC arm, one in UC+MI arm, one in UC+SVAI arm).
Sensitivity analysis 1: excluding pilot participants.
Sensitivity analysis 2: excluding participants who returned to work ≥50% within 1 week after baseline.
*Statistically significant difference (p<0.05) compared with UC only,tested with t-test or Mann-Whitney Wilcoxon test.
95% CI, 95% confidence interval (estimated with 10 000 bootstrap resamples); MI, motivational interviewing; n, number of participants in analysis; SVAI, stratified vocational advice intervention; UC, usual case management.