TABLE 3

Standardized Differences From Weight-for-Age z Scores, Based on the World Health Organization Growth Reference Standards

Incentive, z Score, Mean (SD)Control, z Score, Mean (SD)PEffect Size (95% CI)
1 mo0.68 (0.42)0.85 (0.79).96−0.50 (–1.25 to 0.26)
3 mo0.72 (0.47)0.87 (0.71).74−0.51 (–1.26 to 0.23)
6 mo0.67 (0.48)0.86 (0.77).76−0.14 (–0.81 to 0.54)