| Methods |
"Closed envelope system", no further information. 28 women (10%) women excluded. Low salt 23 excluded: 17 refused diet, 3 social reasons, 2 medical reasons, 1 fetal trisomy. Normal salt 5 excluded: 2 social reasons, 3 medical reasons. |
| Participants |
270 nulliparous women with a singleton pregnancy after 12 weeks, by dates and ultrasound. Excluded if pre‐existing HT, diabetes, renal disease, cardiovascular disease. |
| Interventions |
Low: diet with about 20mmol sodium per day. Oral and written instruction by dietician, no added salt and ready made foods only if no salt in preparation.
Normal: no dietary restriction. |
| Outcomes |
Woman: PIH, PE, severe HT, small for gestational age, preterm delivery
Baby: death. |
| Notes |
Mean urinary sodium after randomisation was around 70mmol/day in the low sodium group and 135mmol/day in the normal diet group. |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Allocation concealment? |
Unclear risk |
B ‐ Unclear |
