Table 3.

Relation of Quetelet Index to Adverse Risk Factors, by Age Group

Quetelet Index Percentiles*Spearman r With Quetelet Index
<2525–4950–7475–8485–9495–97>97Overall>95 P
Ages 5–10 y
n 9048177983403841002563599356
 Age (y)8.28.18.28.58.59.08.7
 TC >200 mg/dL (%)9 1010131817230.100.12
 TG >130 mg/dL (%)23361010210.270.29
 LDLC >130 mg/dL (%)889101812230.120.16
 HDLC <35 mg/dL (%)55648718−0.14−0.14
 High (>95th P)
  Insulin§ 2%2%3%3%4%10%27%0.460.41
  SBP2%2%4%6%7%12%22%0.340.16
  DBP2%2%4%9%7%9%14%0.290.12
Ages 11–17 y
n 1189112212496117632104245568634
 Age (y)14.314.314.414.214.114.014.0
 TC >200 mg/dL (%)66791512190.100.05
 TG >130 mg/dL (%)34571218320.270.16
 LDLC >130 mg/dL (%)44691312210.180.09
 HDLC <35 mg/dL (%)691012141621−0.20−0.13
 High (>95th P)
  Insulin§ 1%1%3%2%5%10%25%0.470.33
  SBP2%4%6%4%7%5%11%0.170.21
  DBP4%5%5%5%4%4%9%0.070.19
  • * Sex- and age-specific percentiles based on national data.

  • All correlation among the 3599 5- to 10-year-olds and the 5568 11- to 17-year-olds are statistically significant at the 0.001 level. The values in the last column represent the magnitude of the correlations between overweight and risk factor levels among persons considered to be overweight.

  • Values represent percentage of subjects with adverse risk factor levels within each of the Quetelet index categories.

  • § Sample sizes for insulin were 2592 and 3028 children, respectively.