Table 1.
Size, observed and expected events, and cumulative incidence of COVID-19 by age and gender subgroups in the total cohort and sub-cohorts.
| Age and gender subgroups | Cohort size | Incidence rate per 1,000 | Observed/expected | Cohort size | Incidence rate per 1,000 | Observed/expected | Cohort size | Incidence rate per 1,000 | Observed/expected |
|---|---|---|---|---|---|---|---|---|---|
| Total cohort | Bus drivers | Other jobs | |||||||
| 20-29 males | 8 | 0.0 | 0/0.28 | 1 | 0.0 | 0/0.03 | 7 | 0.0 | 0/0.24 |
| 20-29 females | 2 | 0.0 | 0/0.07 | 0 | 0.0 | 0/0.0 | 2 | 0.0 | 0/0.07 |
| 30-39 males | 192 | 15.6 | 3/5.20 | 144 | 20.8 | 3/3.90 | 48 | 0.0 | 0/1.30 |
| 30-39 females | 7 | 0.0 | 0/0.20 | 1 | 0.0 | 0/0.03 | 6 | 0.0 | 0/0.18 |
| 40-49 males | 527 | 66.4 | 35/16.52 | 418 | 76.6 | 32/13.11 | 109 | 27.5 | 3/3.42 |
| 40-49 females | 36 | 27.8 | 1/1.22 | 10 | 0.0 | 0/0.29 | 26 | 0.0 | 1/0.88 |
| 50-59 males | 826 | 30.3 | 25/33.01 | 505 | 37.6 | 19/20.18 | 321 | 18.7 | 6/12.83 |
| 50-59 females | 80 | 12.5 | 1/3.20 | 12 | 83.3 | 1/0.42 | 68 | 0.0 | 0/2.72 |
| 60-69 males | 340 | 17.6 | 6/11.05 | 119 | 25.2 | 3/3.87 | 221 | 13.6 | 3/7.18 |
| 60-69 females | 34 | 29.4 | 1/0.96 | 1 | 0.0 | 0/0.02 | 33 | 30.3 | 1/0.93 |
| Total males 95% C.I. |
1,893 | 19.8 (13.6 - 26.1) |
69/66.06 | 1,187 | 24.3 (15.5 - 33.0) |
57/41.09 | 706 | 8.9 (2.0 - 15.8) |
12/24.97 |
| Total females1 | 159 | 9.9 | 3/5.66 | 24 | 12.0 | 1/0.76 | 135 | 9.9 | 2/4.78 |
1The 95% C.I. of the incidence rate in the female cohort and sub-cohorts has not been calculated because the number of events was <10.