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

Table 3

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

Maternal Hb (g/dL)	Sample; 𝑁	Stillbirths (𝑛=846)
		𝑛	%	Crude OR	Adjusted OR	CI at 95%
<9	2,575	68	2.64	3.06*	2.76*	2.11	3.62
9–10.9	16,576	140	0.84	0.96	1.02	0.84	1.25
11–14.5	67,022	587	0.88	1.0	1.0
>14.5	3,121	51	1.63	1.88*	1.48*	1.09	2.04

*Crude 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, gestational diabetes, and cardiopathy (current pregnancy).