Maternal and Perinatal Outcomes in Second Hemoglobin Measurement in Nonanemic Women at First Booking: Effect of Altitude of Residence in Peru

Table 8

Crude and adjusted models to evaluate the association between the value of the second measurement of maternal hemoglobin (Hb) and postpartum hemorrhage (PPH) in women with normal hemoglobin levels (11–14.5 g/dL) at first booking in Peru.

Maternal Hb(g/dL)	Sample; 𝑁	PPH (𝑛=728)
		𝑛	%	Crude OR	Adjusted OR	CI at 95%
<9	2,575	219	8.50	19.3*	20.4*	16.9	24.5
9–10.9	16,576	175	1.06	2.21*	2.59*	2.14	3.14
11–14.5	67,022	321	0.48	1.0	1.0
>14.5	3,121	13	0.42	0.86	0.73	0.41	1.27

*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 and cardiopathy (current pregnancy).