Table 9.

Risk for moderate/severe anemia at second measurement in women with normal hemoglobin (Hb) levels (11–14.5 g/dL) at first booking in Peru.

Risk for moderate/severe anemia	Odds ratio	S.E	Z	P > Z	95% CI
Gestational age at 2nd Hb Hb at first booking Moderate altitude High altitude Age <20 years Age >34 years BMI <19.9 kg/m2 BMI >25.0 Kg/m2 Low education level Without partner Prenatal care <5 First parity Parity ≥3 Preeclampsia Cardiopathy Gestational diabetes	1.05* 0.74 0.57 0.40 1.07 0.97 1.19* 0.84 1.01 1.16* 1.13* 1.14* 1.25* 1.96* 2.09 1.80	0.006 0.019 0.041 0.028 0.056 0.074 0.071 0.041 0.054 0.067 0.047 0.056 0.117 0.128 0.891 0.832	9.21 −11.60 −7.62 −12.92 1.24 −0.43 2.87 −3.52 0.13 2.64 2.98 2.60 2.38 10.28 1.74 1.26	0.000 0.000 0.000 0.000 0.216 0.668 0.004 0.000 0.900 0.008 0.003 0.009 0.017 0.000 0.083 0.207	1.04–1.07 0.70–0.78 0.49–0.66 0.35–0.46 0.96–1.18 0.83–1.12 1.06–1.33 0.76–0.93 0.91–1.12 1.04–1.30 1.04–1.23 1.03–1.25 1.04–1.50 1.72–2.23 0.91–4.82 0.72–4.45

Number of observations: 89,294 mothers. *Significant at 5% level.