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Previous Volume 359:106 July 3, 2008 Number 1

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Metformin versus Insulin for the Treatment of Gestational Diabetes . In the abstract (page 2003), under Results, the parenthetical information should read "(relative risk, 0.99; 95% confidence interval, 0.80 to 1.23)." In the introduction (page 2004), the last sentence of the second paragraph should read as follows: "Its use in pregnancy remains controversial; to our knowledge, only two small, randomized trials addressing this question have been reported to date." In Table 2 (page 2008), the data listed under Relative Risk (95% CI) are incorrect; they should read as follows: for Primary composite outcome, 0.99 (0.80–1.23); Recurrent blood glucose level <46.8 mg/dl, 0.81 (0.59–1.12); Any blood glucose level <28.8 mg/dl, 0.41 (0.21–0.78); Respiratory distress, 0.76 (0.37–1.59); Phototherapy, 0.95 (0.59–1.55); Birth trauma, 0.96 (0.49–1.87); 5-Min Apgar score, 3.06 (0.32–29.26); Preterm birth (<37 wk of gestation), 1.60 (1.02–2.52); Iatrogenic (indicated), 1.41 (0.70–2.84); Spontaneous, 1.77 (0.95–3.28); Admission to level 2 or 3 neonatal intensive care unit, 0.89 (0.66–1.19); and >24-Hr stay in neonatal intensive care unit, 1.04 (0.71–1.53). In the first footnote below Table 2, the sentence that begins with "Induction of labor" should say that "cesarean section was performed in 131 women (36.1%) in the metformin group and 142 (38.4%) in the insulin group" (rather than nonemergency cesarean section). In the Discussion section, in the third pararaph from the end of the text (page 2014), the sentence beginning with "Nonetheless" should read as follows: "Nonetheless, the 95% confidence interval for the relative risk of the composite measure of neonatal complications suggests that an increase in risk of more than 23% with metformin is implausible" (rather than "an increase in risk of more than 10%"). In the same paragraph, the parenthetical information should read "(relative risk, 0.99; 97.5% confidence interval, 0.78 to 1.26)." The article has been corrected on the Journal's Web site at www.nejm.org.

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