Study designs of evaluations included in the review
The authors do not provide any details of the designs of the included studies.
Specific interventions included in the review
Acute administration of nifedipine, either alone or in conjunction with other blood-pressure medications including hydralazine, methyldopa, labetalol, atenolol, or methyldopa plus atenolol and hydralazine. Chronic administration of nifedipine, either alone, with hydralazine or magnesium sulphate, or after maximal doses of labetalol, atenolol or methyldopa had failed to control blood-pressure.
Participants included in the review
Pregnant women with or without hypertension, tocolysis or systemic sclerosis were included.
Outcomes assessed in the review
Maternal outcomes such as haemodynamics, contraction prevention, proteinuria or glucosuria, and Caesarean section; fetal outcomes such as haemodynamics, neonatal complications, gestational age at delivery and foetal distress; and adverse effects.
How were decisions on the relevance of primary studies made?
The authors do not state how the papers were selected for the review, or how many of the authors performed the selection.