Incidence of stress symptoms during follow up of workers without stress symptoms at baseline*
| Baseline | 1st follow up | 2nd follow up | 3rd follow up | All | |
|---|---|---|---|---|---|
| *Stress score less than 4 on a 12 score scale. | |||||
| Stress symptoms, n | 140 | 43 | 38 | 19 | 100 |
| No stress symptoms, n | 2706 | 2049 | 1714 | 1298 | |
| Drop out, n | – | 614 | 297 | 397 | |
| All | 2846 | 2706 | 2049 | 1714 | |
| Years at risk | – | 1710 | 1712 | 1254 | 4676 |
| Incidence, new cases per 1000 person-years | – | 25.1 | 22.2 | 15.2 | 20.8 |