Table 1.
Descriptive statistic for the WAI dimensions
| Variables | Mean (SD) | Range |
|---|---|---|
| 1. Current work ability compared with lifetime best | 7.69 (1.9) | 3–10 |
| 2. Work ability in relation to the demands of the job | 7.76 (1.6) | 2–10 |
| 3. Numbers of current diseases diagnosed by a physician | 4.81 (2.2) | 1–7 |
| 4. Estimated work impairment due to diseases | 4.95 (1.1) | 1–6 |
| 5. Sick leave during the past 12 mo | 4.44 (0.96) | 1–5 |
| 6. Personal prognosis of work ability 2 y from now | 5.76 (1.7) | 1–7 |
| 7. Mental resources | 2.62 (0.97) | 1–4 |
| Total WAI score | 38.04 (6.3) | 18–49 |
SD, standard deviation; WAI, Work Ability Index.