Morbidity episodes, frequency rates*, and average duration of absences in days by age and gender, 1990–99, Norco plant
| Females | Males | Total | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Age | Episodes | Freq rate | Average duration | Episodes | Freq rate | Average duration | Episodes | Freq rate | Average duration |
| *Per 100 person-years. | |||||||||
| <30 | 16 | 5.9 | 1.4 | 63 | 7.4 | 1.2 | 79 | 7.0 | 1.2 |
| 30–39 | 107 | 15.5 | 4.9 | 554 | 13.3 | 3.4 | 661 | 13.6 | 3.6 |
| 40–49 | 120 | 16.8 | 4.5 | 897 | 14.9 | 3.4 | 1017 | 15.1 | 3.5 |
| 50–59 | 56 | 25.7 | 9.7 | 535 | 22.8 | 8.8 | 591 | 23.0 | 8.9 |
| 60+ | 3 | 7.9 | 1.2 | 125 | 31.8 | 12.6 | 128 | 29.7 | 11.6 |
| Total | 302 | 15.6 | 4.7 | 2174 | 15.8 | 4.4 | 2476 | 15.8 | 4.5 |