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Table 1 Sample Characteristics

From: Are computer and cell phone use associated with body mass index and overweight? A population study among twin adolescents

  Boys Girls Boys and girls
N 1981 2117 4098
mean age, SD 17.6 (0.24) 17.6 (0.27) 17.6 (0.26)
mean BMI, SD 21.8 (3.0) 21.0 (3.0) 21.4 (3.0)
prevalence of overweight and obesity (%) 11.9 7.9 9.8
prevalence of overweight (%) 9.4 6.6 8.0
prevalence of obesity (%) 2.4 1.3 1.9