Table 1.

Median Levels of Quetelet Index and Proportion of Persons Considered Overweight

Age (Year)BoysGirls
BogalusaHES/NHANESBogalusaHES/NHANES
nMedianOverweight (%)*95th PnMedianOverweight (%)*95th P
 522815.54.418.4 –18.621615.36.018.8 –19.1
 628915.77.618.9 –19.326815.66.319.4 –19.8
 726316.06.819.7 –20.227915.97.920.3 –20.8
 833316.410.820.6 –21.031416.311.221.3 –21.8
 933616.812.221.5 –22.032917.112.222.3 –22.8
1039217.715.622.4 –22.935217.711.623.4 –24.0
1141018.312.423.4 –23.941418.817.624.5 –25.1
1245518.411.624.3 –24.842119.79.025.6 –26.1
1351619.413.025.3 –25.743020.210.726.6 –27.1
1448820.210.426.1 –26.540620.512.327.6 –28.0
1542820.610.326.9 –27.337621.312.028.4 –28.7
1637921.111.127.7 –28.132021.38.829.1 –29.5
1727221.77.728.5 –28.925321.49.930.0 –30.4
Overall478910.8437810.8
  • * Overweight (%) is the percentage of subjects in the study population who have a Quetelet index above the 95th P of national data.

  • Cutpoints for overweight are based on smoothed (sex- and age-specific) estimates of the 95th P from aggregated data from Health Examination Survey II and III, and National Health and Nutrition Examination Surveys I, II, and III. The two numbers represent the 95th P for each half-year of each age. For example, 18.4 kg/m2is the 95th P among 5- to 5½-year-old boys, and 18.6 kg/m2 is the 95th P among 5½- to 6-year-old boys.