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Table 2 Association between interbirth interval and preeclampsia status with and without adjustment for confounders

From: Interbirth interval and history of previous preeclampsia: a case–control study among multiparous women

Variable Univariate analysis Multivariate analysis
  Unadjusted OR 95% CI Adjusted OR* 95% CI
IBI (years)     
        <5 1.00    
        ≥5 5.26 2.39-11.57 2.90 1.07-7.86
Age at delivery (years) 1.14 1.06-1.24 1.03 0.93-1.14
BMI (kg/m2) 1.26 1.14-1.40 1.23 1.11-1.37
Renal disease     
        No 1.00   1.00  
        Yes 5.81 1.47-22.87 0.98 0.16-5.96
  1. BMI, Body Mass Index; IBI, Interbirth Interval.
  2. *Adjusted for all variables in Table 2.