Descriptive figures show mean days and SD for each group per month for sickness absence during the follow-up period (figure 2A). Estimated mean differences in sickness absence for each group per month. The estimated values correspond to the regression model in figure 2B.
| Month | Baseline | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |
| Descriptive figures | ||||||||||||||
| Mean days | PSI | 11.3 | 11.9 | 9.3 | 7.2 | 6.0 | 5.2 | 5.1 | 4.3 | 3.5 | 3.2 | 2.3 | 3.6 | 3.0 |
| (SD) | (12.6) | (13.1) | (11.6) | (10.6) | (9.8) | (8.3) | (8.2) | (8.3) | (7.5) | (7.2) | (6.2) | (8.6) | (8.2) | |
| Mean days | CAU | 10.6 | 13.6 | 11.9 | 10.6 | 10.1 | 9.5 | 8.8 | 7.4 | 6.6 | 5.6 | 4.7 | 4.4 | 3.9 |
| (SD) | (12.5) | (13.0) | (12.9) | (12.5) | (12.1) | (11.7) | (11.1) | (10.3) | (9.3) | (8.9) | (8.6) | (8.5) | (8.5) | |
| Estimated Figures | ||||||||||||||
| Mean days | PSI | 12.2 | 10.5 | 9.0 | 7.7 | 6.5 | 5.5 | 4.7 | 4.0 | 3.5 | 3.2 | 3.0 | 3.0 | 3.09 |
| CAU | 12.4 | 11.9 | 11.3 | 10.7 | 10.0 | 9.3 | 8.6 | 7.8 | 7.0 | 6.1 | 5.2 | 4.2 | 3.24 | |
| Mean difference | −0.2 | −1.4 | −2.3 | −3.0 | −3.5 | −3.8 | −3.9 | −3.8 | −3.5 | −2.9 | −2.2 | −1.3 | −0.14 | |
| 95% CI | Lower | −5.4 | −5.9 | −6.5 | −7.0 | −7.4 | −7.6 | −7.6 | −7.3 | −6.8 | −6.1 | −5.3 | −4.3 | −3.38 |
| Upper | 4.9 | 3.2 | 1.9 | 1.0 | 0.4 | 0.0 | −0.2 | −0.2 | −0.1 | 0.3 | 0.8 | 1.8 | 3.10 | |
CAU, care as usual; PSI, problem-solving intervention.