Table 7.
Crude and adjusted models to evaluate the association between the value of the second measurement of maternal hemoglobin (Hb) and premature rupture of membranes (PROM) in women with normal hemoglobin levels (11–14.5 g/dL) at first booking in Peru.
| Maternal Hb (g/dL) |
Sample N |
PROM (n = 5,821) | |||||
|---|---|---|---|---|---|---|---|
| n | % | Crude OR | Adjusted OR | CI at 95% | |||
| <9 | 2,575 | 158 | 6.14 | 0.90 | 0.92 | 0.78 | 1.09 |
| 9–10.9 | 16,576 | 999 | 6.03 | 0.89* | 0.93 | 0.86 | 1.00 |
| 11–14.5 | 67,022 | 4,498 | 6.71 | 1.0 | 1.0 | ||
| >14.5 | 3,121 | 166 | 5.32 | 0.78* | 0.71* | 0.60 | 0.84 |
*OR P < 0.05. Model adjusted for gestational age at first Hb, maternal age, altitude, maternal education, marital status, body mass index, antenatal care, parity, preeclampsia, gestational diabetes, cardiopathy, and infection of urinary tract (current pregnancy).