Table 4.
Participant profile, number of pregnancies and pregnancy rates by contraceptive method at baseline
| Variable | DMPA (N=582) |
NET-EN (N=148) |
COC (N=138) |
Other (N=21) |
Total |
|---|---|---|---|---|---|
| Age groups | |||||
| 18-24 | 398 (68.38) | 105 (70.95) | 74 (53.62) | 2 (9.52) | 579 |
| 25-29 | 112 (19.24) | 29 (19.59) | 32 (23.19) | 4 (19.05) | 177 |
| 30-34 | 44 (7.56) | 10 (6.76) | 22 (15.94) | 9 (42.86) | 85 |
| 35+ | 28 (4.81) | 4 (2.70) | 10 (7.25) | 6 (28.57) | 48 |
| Median (IQR) | 22 (20-26) | 22 (20-25) | 24 (20-29) | 33 (29- 35) |
|
| Parity N (%) | |||||
| 0 | 91 (15.64) | 51 (34.46) | 55 (39.86) | 0 (0.0) | 197 |
| 1 | 349 (59.97) | 71 (47.97) | 50 (36.23) | 0 (0.0) | 470 |
| 2 | 100 (17.18) | 20 (13.51) | 23 (16.67) | 4 (19.05) | 147 |
| 3 | 29 (4.98) | 3 (2.03) | 8 (5.80) | 10 | 50 |
| 4+ | 13 (2.23) | 3 (2.03) | 2 (1.45) | 7 (33.33) | 25 |
| Pregnant N (%) | |||||
| Negative | 570 (97.94) | 145 (97.97) | 100 (72.46) | 21 (100.0) |
836 |
| Positive | 12 (2.06) | 3 (2.03) | 38 (27.54) | 0 (0.0) | 53 |
| Pregnancy incidence rate per 100 woman years (95% CI) |
1.34 (0.69- 2.35) |
1.37 (0.28- 3.99) |
19.73 (13.96- 27.08) |
||
| Pregnancy rate * | |||||
| Pregnancy incidence rate per 100 woman years (95% CI) |
0.46 (0.13- 1.18) |
1.75 (0.48- 4.49) |
11.47 (7.27- 17.22) |
*
at time of index pregnancy accounting for method switching