Mexico 1992.

Methods	Please see details below.
Participants	38 women > 28 weeks' gestation with SBP >/= 150 mmHg, DBP >/= 110 mmHg, proteinuria 2+, no previous treatment, at least 1 symptom (of headache, blurred vision, epigastric pain) and no epilepsy.
Interventions	MgSO4: 4 g IV over 15 min, then 1 g/hr infusion. Diazepam: 30 mg in 500 ml 5% glucose IV at 60 microg/hr. If convulsions, bolus of 10 mg IV.
Outcomes	Woman: eclampsia, caesarean section. Baby: mean Apgar scores (1 and 5 min).
Notes	Nifedipine for BP control. Translated from the Spanish.
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Low risk	"Permuted block randomisation" using random number tables.
Allocation concealment?	Unclear risk	Allocation was by sealed, numbered envelopes.
Blinding? All outcomes	Unclear risk	Not described.
Incomplete outcome data addressed? All outcomes	Unclear risk	The total number of women eligible for trial entry is not described.