Table 3.
Incidence of HIV in control and experimental groups for 2 years (0–730 days)
| Group | Events | N | Person-years | Incidence (per 100 p/y) |
95 % Confidence intervals |
|
|---|---|---|---|---|---|---|
| Index cases | Control | 6 | 34 | 36.40 | 16.49 | (7.18–37.91) |
| Experimental | 4 | 42 | 48.06 | 8.26 | (3.12–21.87) | |
| Network members | Control | 8 | 38 | 40.57 | 20.01 | (9.78–40.93) |
| Experimental | 5 | 46 | 51.1 | 10.61 | (4.44–25.36) | |
| Total | Control | 14 | 72 | 76.98 | 19.57 | (10.74–35.65) |
| Experimental | 9 | 88 | 99.16 | 7.76 | (3.51–17.19) | |
| IRR | ||||||
| Experimental versus | Control | 0.41 | (0.15–1.08) |
IRR incidence rate ratio