American Journal of Clinical Nutrition, Vol 62, 49-57, Copyright © 1995 by The American Society for Clinical Nutrition, Inc

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Dietary sodium restriction in the prophylaxis of hypertensive disorders of pregnancy: effects on the intake of other nutrients

BJ van Buul, EA Steegers, HW Jongsma, AL Rijpkema, TK Eskes, CM Thomas, H Baadenhuysen and PR Hein
Department of Obstetrics and Gynecology, University Hospital Sint Radboud, Nijmegen, Netherlands.

Dietary sodium restriction is used in the Netherlands in the prophylaxis of preeclampsia. To study the effects of long-term sodium restriction on the intake of other nutrients and the outcome of pregnancy, 68 healthy nulliparous pregnant women were randomly assigned to either a low-sodium diet (20 mmol/24 h) or an unrestricted diet. The diet was consumed between week 14 of gestation and delivery. The dietary intakes of energy, fat, protein, carbohydrate, sodium, potassium, and calcium were estimated with the dietary-history technique. A low-sodium diet reduced the intake of protein (by approximately 15 g/24 h), fat (by 20 g/24 h), and calcium (by 350 mg/24 h) and tended to decrease the energy intake (by approximately 0.7 MJ/24 h). The intakes of carbohydrate and potassium did not differ between the groups. The maternal weight gain was less in the low-sodium group (6.0 +/- 3.7 compared with 11.7 +/- 4.7 kg). Mean birth weight was not significantly different (3.2 +/- 0.5 compared with 3.4 +/- 0.5 kg).

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