Table 4.
Risk of Adverse Delivery Outcomes Associated with IDI
| IDI (months)a | Adjusted RR (95% CI)b | ||||||
|---|---|---|---|---|---|---|---|
| 6–17 N (%) | 18–36 N (%) | 37–60 N (%) | 61–180 N (%) | 6–17 vs. 18–36 | 37–60 vs. 18–36 | 61–180 vs. 18–36 | |
| Deliveries | 17,392 | 91,670 | 50,447 | 22,273 | |||
| Obstructed labor | 711 (4.1) | 2858 (3.1) | 1765 (3.5) | 1007 (4.5) | 1.17 (1.07, 1.28) | 1.18 (1.11, 1.24) | 1.54 (1.43, 1.65) |
| Maternal hemorrhage | 525 (3.0) | 1891 (2.1) | 955 (1.9) | 458 (2.1) | 1.17 (1.04, 1.33) | 1.01 (0.93, 1.10) | 1.19 (1.06, 1.32) |
| Hypertension/pre-eclampsia/eclampsia | 359 (2.1) | 1242 (1.4) | 916 (1.8) | 731 (3.3) | 1.38 (1.19, 1.61) | 1.39 (1.26, 1.54) | 2.10 (1.87, 2.36) |
| Fetal malposition | 396 (2.3) | 1419 (1.5) | 773 (1.5) | 491 (2.2) | 1.27 (1.11, 1.46) | 1.03 (0.95, 1.13) | 1.34 (1.22, 1.48) |
| Maternal infection | 375 (2.3) | 1217 (1.4) | 625 (1.4) | 323 (1.6) | 1.35 (1.17, 1.56) | 1.05 (0.96, 1.16) | 1.33 (1.21, 1.46) |
| Maternal hospitalization | 1109 (7.1) | 4724 (5.7) | 3006 (6.6) | 2080 (10.1) | 1.31 (1.22, 1.41) | 1.17 (1.11, 1.23) | 1.55 (1.43, 1.67) |
| Maternal death < 42 days, N (Rate/100,000 deliveries) | 35 (202) | 139 (152) | 94 (187) | 40 (180) | 1.25 (0.77, 2.02) | 1.40 (1.05, 1.88) | 1.54 (1.10, 2.16) |
aColumns present N (%) for each adverse delivery outcome within each IDI category with the exception of maternal death < 42 days which is presented as rate/100,000 deliveries
bRelative risks and 95% confidence intervals from a logistic model with generalized estimating equations to account for the correlation of outcomes within cluster adjusting for maternal age, education, parity, ANC visits, and iron supplements. All Maternal outcomes used a Binomial distribution