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Table 3 Interaction between interbirth interval and the history of previous preeclampsia

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

History of previous preeclampsia IBI Unadjusted OR (95% CI) Interaction term (95% CI) Adjusted OR*(95% CI) Adjusted Interaction term*(95% CI)
Yes Short(<5year) 1.00   1.00  
Long(≥5year) 1.13 (0.17-7.24) 0.11 0.60 (0.07-4.99) 0.09
No Short(<5year) 1.00 (0.01-1.01) 1.00 (0.01-0.96)
  Long(≥5year) 10.1 (3.12-32.73)   6.88 (1.75-27.05)  
  1. BMI, Body Mass Index; IBI, Interbirth Interval.
  2. *Adjusted for age, BMI, renal disease.