Skip to main content

Table 4 ORs (95% CIs) for adverse pregnancy outcomes according to the quartiles of D-value for hemoglobin (Hb) levels

From: High hemoglobin level is a risk factor for maternal and fetal outcomes of pregnancy in Chinese women: A retrospective cohort study

  D-value for Hb levels (g/L) P trend
Q1 (<−4.49) Q2 (−4.48–1.67) Q3 (1.68–7.17) Q4 (> 7.18)
PTB
 Case/N 35/478 31/484 29/475 13/474  
 Model 1 1 0.87 (0.53, 1.43) 0.82 (0.49, 1.37) 0.36 (0.19, 0.68) 0.003
 Model 2 1 0.87 (0.53, 1.44) 0.80 (0.48, 1.35) 0.35 (0.18, 0.68) 0.003
LBW
 Case/N 23/478 13/484 18/475 12/474  
 Model 1 1 0.55 (0.27, 1.09) 0.78 (0.42, 1.46) 0.52 (0.25, 1.05) 0.127
 Model 2 1 0.54 (0.27, 1.09) 0.79 (0.42, 1.49) 0.47 (0.23, 0.98) 0.089
SGA
 Case/N 17/478 20/484 25/475 24/474  
 Model 1 1 1.17 (0.61, 2.26) 1.51 (0.80, 2.83) 1.45 (0.77, 2.73) 0.184
 Model 2 1 1.16 (0.60, 2.26) 1.45 (0.77, 2.74) 1.27 (0.66, 2.43) 0.371
  1. Model 1: without adjustment
  2. Model 2: adjustment for age, BMI, education, conception method, parity, history of miscarriage and GDM
  3. Abbreviations: PTB preterm birth, LBW low-birth-weight infants, SGA small-for-gestational-age infants