TABLE 2

Relationship Between Age at Menarche and Mean BMI z Score in 11- to 13-Year-Old Girls

Age, yNHESNHANES III
PremenarchealPostmenarchealPremenarchealPostmenarcheal
nBMI z ScorenBMI z ScorenBMI z ScorenBMI z Score
11441−0.22650.752040.17570.83
12295−0.282450.5296−0.151270.63
13153−0.564220.3429−0.331810.71
  • Data are from the NHES and NHANES III studies. All differences between premenarcheal and postmenarcheal girls were significant at P < .01.

  • Adapted from Anderson SE, Dallal GE, Must A. Pediatrics. 2003;111(4 pt 1):844–850.