Table 1:

World Health Organization definitions of weight status for children14

Age, yrBody mass index z-score category; weight status
< −2≥ −2 to ≤ 1> 1 to ≤ 2> 2 to ≤ 3> 3
≥ 5UnderweightNormal weightOverweightObeseSeverely obese
< 5UnderweightNormal weightAt risk for overweightOverweightObese