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Table 2 Trostad 2001. Odds ratio of recurrent pre-eclampsia with inter-pregnancy intervals of less than 1 or 5 years or more compared to 1–5 years. Results were adjusted by maternal age in 2nd pregnancy, new father, delivery year

From: Inter-pregnancy interval and risk of recurrent pre-eclampsia: systematic review and meta-analysis

Interval OR Low High Sub-group OR Low High Sub-group OR Low High
≤1 year 1.24 0.83 1.85 Same father 1.18 0.76 1.85 New father - - -
1–5 years Ref. Ref. Ref. Ref. Ref. Ref. Ref. Ref. Ref.
6–10 years 1.04 0.93 1.16 1.06 0.93 1.21 1.02 0.65 1.61
11–15 years 0.85 0.61 1.19 0.52 0.27 1.01 0.63 0.29 1.4
>15 years 0.78 0.48 1.27 0.73 0.28 1.91 0.52 0.19 1.41