Differences in mean days of registered sickness absence, annually 2001–2008, between the participants and comparison groups within each of the three cohorts included in the HAP
| Participants | Non-participants | Target population | |||||
|---|---|---|---|---|---|---|---|
| Year | n | Mean days | 95% CI | Mean days crude (raw difference†) | Mean days weighted‡ (raw difference†) | Mean days crude (raw difference†) | Mean days weighted‡ (raw difference†) |
| Random population cohort§ | |||||||
| 2008 | 3379 | 8.5 | 7.0 to 9.9 | – | – | 9.6 (1.1) | 10.2 (1.7)* |
| 2007 | 3426 | 11.9 | 10.2 to 13.7 | – | – | 12.2 (0.3) | 13.1 (1.2) |
| 2006 | 3451 | 12.7 | 10.9 to 14.5 | – | – | 14.0 (1.3) | 15.0 (2.3)* |
| 2005 | 3477 | 14.2 | 12.4 to 16.1 | – | – | 15.7 (1.5) | 16.8 (2.6)** |
| 2004 | 3519 | 16.2 | 14.2 to 18.2 | – | – | 17.7 (1.5) | 19.0 (2.8)** |
| 2003 | 3538 | 17.6 | 15.4 to 19.8 | – | – | 20.4 (2.8)* | 21.9 (4.3)** |
| 2002 | 3468 | 17.0 | 14.9 to 19.2 | – | – | 21.0 (4.0)** | 22.2 (5.2)** |
| 2001 | 3384 | 14.9 | 12.9 to 16.8 | – | – | 19.3 (4.4)** | 20.2 (5.3)** |
| Recent sick-listed employee cohort¶ | |||||||
| 2008 | 2676 | 81.8 | 78.3 to 85.3 | 78.3 (−3.5) | 78.8 (−3.0) | 79.2 (−2.6) | 79.7 (−2.1) |
| 2007 | 2676 | 20.3 | 18.2 to 22.5 | 22.5 (2.2)* | 23.0 (2.7)* | 22.0 (1.7) | 22.3 (2.0) |
| 2006 | 2672 | 29.4 | 26.5 to 32.7 | 30.3 (0.9) | 31.3 (1.9) | 30.1 (0.7) | 30.9 (1.5) |
| 2005 | 2666 | 34.3 | 31.0 to 37.5 | 33.7 (−0.6) | 35.1 (0.8) | 33.8 (−0.5) | 34.9 (0.6) |
| 2004 | 2661 | 33.2 | 29.9 to 26.4 | 34.6 (1.4) | 36.3 (3.1) | 34.2 (1.0) | 35.4 (2.2) |
| 2003 | 2658 | 32.0 | 28.8 to 35.3 | 35.8 (3.8)* | 37.7 (5.7)** | 34.8 (2.8) | 36.0* (3.8) |
| 2002 | 2650 | 30.4 | 27.4 to 33.4 | 31.9 (1.5) | 33.9 (3.5)* | 31.4 (1.0) | 32.7 (2.3) |
| 2001 | 2644 | 24.4 | 21.7 to 27.1 | 26.6 (2.2) | 28.4 (4.0)** | 26.0 (1.6) | 27.1 (2.7) |
| Total | 2639 | 287.2 | 273.2 to 301.2 | 293.8 (6.6) | 304.3 (17.1) | 291.5 (4.3)* | 299.0 (11.8) |
| Recent sick-listed non-employee cohort¶ | |||||||
| 2008 | 277 | 68.3 | 57.9 to 78.7 | 55.7 (−12.6)* | 56.8 (−11.5)* | 56.6 (−11.1)* | 57.6 (−10.7)* |
| 2007 | 277 | 49.5 | 37.7 to 61.4 | 32.8 (−16.7)** | 32.9 (−16.6)** | 33.9 (−15.6)* | 34.2 (−15.3)* |
| 2006 | 276 | 47.0 | 35.0 to 58.9 | 36.1 (−11.5) | 35.9 (−11.1) | 36.8 (−10.2) | 36.8 (−10.2) |
| 2005 | 275 | 47.6 | 35.8 to 59.4 | 39.1 (−0.8) | 39.4 (−8.2) | 39.6 (−8.0) | 39.8 (−7–8) |
| 2004 | 275 | 39.9 | 28.8 to 51.0 | 40.7 (0.8) | 41.2 (1.3) | 40.6 (0.7) | 40.9 (1.0) |
| 2003 | 275 | 36.1 | 25.9 to 46.3 | 41.5 (4.1) | 42.1 (6.0) | 41.1 (5.0) | 41.5 (5.4) |
| 2002 | 273 | 37.4 | 26.7 to 48.1 | 35.6 (−1.8) | 36.1 (−1.3) | 35.7 (−1.7) | 36.1 (−1.3) |
| 2001 | 272 | 27.3 | 18.9 to 35.8 | 27.3 (0.0) | 27.7 (0.4) | 27.3 (0.0) | 27.7 (0.4) |
| Total | 271 | 358.2 | 304.7 to 411.7 | 308.8 (−45.4) | 311.7 (−46.5) | 311.7 (−46.5) | 314.6 (−43.6) |
*p<0.05; **p<0.01. Differences in means examined employing one-sample Student's t-tests.
†Raw difference=mean days non-participants or target population—mean days participants.
‡Weighted for gender and age distribution among HAP participants.
§Participants aged 20–59 in the respective calendar years are compared with the corresponding age groups in the Västra Götaland population (target population).
¶Only age group 31–64 (per 2008) included to avoid age-related left censoring when going back in time towards 2001. Among participants, only those having ≥1 day of registered sickness absence in 2008 are included to achieve equal inclusion criterion as for the non-participation group. Non-participants comprise all individuals granted benefit by the SIA for a new spell of sickness absence during the inclusion period (target population), excluding participants.
HAP, Health Assets Project; SIA, Social Insurance Agency.