Antiplatelet drugs v placebo or no antiplatelet drug for women at risk for pre-eclampsia*

Weighted event rates
Outcomes at deliveryNumber of trialsAntiplateletPlacebo RRR (95% CI)NNT (CI)
*Abbreviations defined in glossary; weighted event rates calculated from data in article.
Pre-eclampsia27 6.8% 7.8%15% (8 to 22)100 (59 to 167)
Preterm birth2317.2%18.6% 8% (3 to 12) 72 (44 to 200)
Stillbirth or neonatal death30 2.5% 2.9%14% (2 to 25)250 (125 to >10 000)