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  • Title: Interventions for leg cramps in pregnancy.
    Author: Young GL, Jewell D.
    Journal: Cochrane Database Syst Rev; 2002; (1):CD000121. PubMed ID: 11869565.
    Abstract:
    BACKGROUND: Many women experience leg cramps in pregnancy. They become more common as pregnancy progresses and are especially troublesome at night. OBJECTIVES: The objective of this review was to assess methods of preventing and treating leg cramps in pregnancy. SEARCH STRATEGY: We searched the Cochrane Pregnancy and Childbirth Group trials register (October 2001). SELECTION CRITERIA: Randomised trials of treatments for leg cramps in pregnancy. DATA COLLECTION AND ANALYSIS: Trial quality was assessed and data were extracted independently by two reviewers. MAIN RESULTS: Five trials involving 352 women were included. The trials were of moderate quality. The only placebo-controlled trial of calcium treatment showed no evidence of benefit. Trials comparing sodium chloride with placebo (odds ratio 0.54, 95% confidence interval 0.23 to 1.29) and calcium with sodium chloride (odds ratio 1.23, 95% confidence intervals 0.47 to 3.27 ) showed no evidence of benefit. Placebo controlled trials of multivitamin with mineral supplements (odds ratio 0.23, 95% confidence intervals 0.05 to 1.01) and magnesium (odds ratio 0.18, 95% confidence intervals 0.05 to 0.60) provided some suggestion of benefit. REVIEWER'S CONCLUSIONS: The evidence that calcium reduces cramp is weak and seems to depend on placebo effect. The evidence for sodium chloride is stronger but the results of the sodium chloride trial may no longer be relevant because of dietary changes which include an increased sodium intake in the general population. It is not possible to recommend multivitamins with mineral supplementation, as it is not clear which ingredient, if any, is helping. If a woman finds cramp troublesome in pregnancy, the best evidence is for magnesium lactate or citrate taken as 5mmol in the morning and 10mmol in the evening.
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