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| Group | N (%) | P value | |
|---|---|---|---|
| Gestational diabetes mellitus | Metformin | 13 (15.9) | 0.683 |
| Control | 16 (19.5) | ||
| Absolute risk reduction (95%CI) | NNT | ||
| 3.6% (-0.08–0.15) | 25 | ||
Abbreviation: NNT, number needed to treat; 95%CI, 95% confidence interval.
