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

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/m^2; BMI >25.0 Kg/m^2; 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.