Results for HIV acquisition according to intention-to-treat and per protocol analyses (initial method received)
| Analysis | HIV acquisition | Effect estimate (IPC vs IUD) | p | ||
|---|---|---|---|---|---|
| n (%) | N | RR | 95% CI | ||
| ITT analysis (i.e. according to group allocation) | |||||
| IPC | 20 (3.0) | 656 | 0.88 | 0.48–1.59 | 0.7 |
| IUD | 22 (3.5) | 634 | 1 | ||
| PP analysis (i.e. according to initial method received) | |||||
| IPC | 21 (3.2) | 661 | 0.94 | 0.52–1.71 | 0.8 |
| DMPA | 19 (3.4) | 558 | 1.01 | 0.55–1.86 | 1.0 |
| NET | 2 (1.9) | 103 | 0.58 | 0.14–2.42 | 0.4 |
| IUD | 21 (3.4) | 623 | 1 | ||
| OC | 0 (0) | 1 | |||
| Missing data | 0 (0) | 5 | |||
CI, confidence interval; DMPA, depot medroxyprogesterone acetate; IPC, injectable progestogen contraception; ITT, intention-to-treat; IUD, intrauterine contraceptive device; NET, norethisterone enanthate; OC, oral contraception; PP, per protocol; RR, risk ratio.