Attrition in children receiving antiretroviral therapy in rural KwaZulu-Natal (June 2004–June 2008)
| No. | Attrition (n) | Follow-up (child-years) | Attrition rate/1000 child-years (95% CI) | |
| Overall | 477 | 18 | 732.13 | 24.6 (16.7 to 36.2) |
| Within 90 days | 3 | 112.39 | 26.7 (18.4 to 38.6) | |
| After 90 days | 15 | 618.81 | 24.2 (16.3 to 35.7) | |
| Children aged <18 months | 59 | 4 | 78.7 | 50.8 (38.8 to 66.2) |
| Within 90 days | 1 | 13.42 | 74.5 (59.8 to 92.5) | |
| After 90 days | 3 | 65.27 | 46.0 (34.6 to 60.7) | |
| Children aged 18–59 months | 131 | 5 | 192.2 | 26.0 (17.8 to 37.8) |
| Within 90 days | 0 | 31.2 | 0 | |
| After 90 days | 5 | 161 | 31.1 (22.0 to 43.8) | |
| Children aged ≥60 months | 287 | 9 | 461.3 | 19.5 (12.6 to 30.1) |
| Within 90 days | 2 | 67.8 | 29.5 (20.7 to 41.9) | |
| After 90 days | 7 | 392.5 | 17.8 (11.3 to 28.0) |