Characteristics of included studies.

<p>*RB7, Risk of Bias question #7 (“Was confounding accounted for in the design and/or analysis?”); PE, preeclampsia; SGA, small for gestational age; NOS, Newcastle-Ottawa Scale [score out of 9 maximum]; SES, socioeconomic status; INTAPP, An international trial of antioxidants in the prevention of preeclampsia, POUCH, Pregnancy outcomes and community health</p><p>Characteristics of included studies.