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Table 3 Univariate and multivariate logistic regression for the factors associated with preeclampsia

From: Association of dietary calcium intake, total and ionized serum calcium levels with preeclampsia in Ethiopia

Variable Cases Controls p-value cOR (95% C.I.) p-value aOR (95% C.I.)
Parity
 Nulliparous 22 17 0.28 1.62 (0.68–3.84) 0.95 1.04 (0.33–3.27)
 Multiparous 20 25 Ref    
Gestational age (weeks)
  < 28 1 1 0.76 1.55 (0.09–26.01) 0.10 13.60 (0.63–294.62)
 28–34.9 9 3 0.03 4.64 (1.13–19.04) 0.13 3.69 (0.70–19.65)
 35–36.9 10 4 0.04 3.86 (1.08–13.86) 0.12 3.52 (0.72–17.30)
 ≥ 37 22 34 Ref    
Ionized Calcium level (mmol/l)
  < 1.16 29 9 0.00 8.1 (3.05–21.91) 0.00 7.51 (2.39–23.60)
 ≥ 1.16 13 33 Ref    
Total serum calcium level (mmol/l)
  < 2.1 29 15 0.00 4.02 (1.62–9.97) 0.045 3.10 (1.02–9.37)
  ≥ 2.1 13 27 Ref    
Dietary calcium intake (gm/24 h)
  < 1000 27 18 0.05 2.40 (1.00–5.78) 0.03 3.42 (1.10–10.72)
  ≥ 1000 15 24 Ref    
  1. cOR Crude odds ratio, aOR Adjusted odds ratio, 95% C.I. 95% confidence interval