Effect of HIV on time off work, adjusted for calendar period and age
| Factor | Overall absence from work, OR | Medical, RRR‡ | Leave, RRR‡ | Unauthorised, RRR‡ |
| HIV status and years since seroconversion* | p<0.001 | p<0.001 | p<0.001 | p<0.001 |
| Negative | 1− | 1− | 1− | 1− |
| Positive (all years) | 1.36 (1.33 to 1.39) | 2.75 (2.58 to 2.94) | 1.09 (1.07 to 1.11) | 1.92 (1.84 to 2.01) |
| Positive: <2 | 1.40 (1.36 to 1.45) | 2.66 (2.45 to 2.90) | 1.16 (1.13 to 1.19) | 1.95 (1.84 to 2.06) |
| Positive: 2 to <4 | 1.31 (1.27 to 1.35) | 2.57 (2.35 to 2.81) | 1.06 (1.03 to 1.10) | 1.82 (1.70 to 1.93) |
| Positive: 4 to <6 | 1.35 (1.29 to 1.40) | 2.81 (2.53 to 3.11) | 1.06 (1.02 to 1.09) | 1.96 (1.80 to 2.14) |
| Positive: 6 to <8 | 1.38 (1.31 to 1.46) | 2.94 (2.54 to 3.41) | 1.09 (1.04 to 1.13) | 2.05 (1.83 to 2.30) |
| Positive: 8+ | 1.45 (1.33 to 1.59) | 3.56 (2.92 to 4.34) | 1.06 (0.99 to 1.13) | 2.33 (1.90 to 2.87) |
| HIV status and years before death† | p<0.001 | p<0.001 | p<0.001 | p<0.001 |
| Negative | 1− | 1− | 1− | 1− |
| Positive: >2 years before death | 1.41 (1.34 to 1.49) | 3.05 (2.62 to 3.56) | 1.09 (1.05 to 1.14) | 2.10 (1.90 to 2.32) |
| Positive: penultimate year | 1.59 (1.45 to 1.73) | 4.31 (3.62 to 5.13) | 1.10 (1.01 to 1.20) | 2.03 (1.75 to 2.35) |
| Positive: final year | 3.27 (2.95 to 3.63) | 13.6 (11.8 to 15.6) | 1.51 (1.31 to 1.73) | 3.75 (3.15 to 4.46) |
↵* Adjusted OR and RR ratio (RRR) with 95% CI are from a regression model including calendar time, age and HIV status/years since seroconversion.
↵† Adjusted OR and RRR with 95% CI are from a regression model including calendar time, age and HIV status/years before death. All data from HIV-negative miners are used together with data from those HIV-positive miners who died during follow-up from natural causes.
↵‡ RR ratio values with 95% CI are given relative to being at work.