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. 2013 Dec 24;2013:783103. doi: 10.1155/2013/783103

Table 3.

NNT and estimates of effect, in millions, for percent body fat.

Study NNT (95% CI) E1 (95% CI) (millions) E2 (95% CI) (millions)
Atlantis et al. [42] 4 (3, 18) 2.8 (4.7, 0.7) 24.5 (41.7, 0.6)
McGovern et al. [43] 3 (3, 6) 3.6 (4.7, 2.1) 31.5 (41.7, 18.5)

Notes: NNT: number-needed-to treat; E1: estimate 1 derived from number of obese children and adolescents in the United States who could benefit from exercise (based on a previously estimated 12.5 million obese children and adolescents) [4]; E2: estimate 2 derived from number of overweight and obese children in the world who could benefit from exercise (based on a previously estimated 110 million overweight or obese children) [2, 38].