Table 2.

Description of Study Population*

CharacteristicOverallAge Group (Year)Spearman Correlation With Age
5–1011–17
n 916735995568
 % black36%35%37%
 % female48%49%47%
Quetelet index, kg/m2 18.616.320.10.58
 (Overweight)(10.8%) (9.9%)(11.4%)
Rohrer index, kg/m3 12.713.012.5−0.10
Skinfold thickness, mm
 Subscapular8.36.3100.45
 Triceps13.312.014.70.18
TC, mg/dL (>200 mg/dL)160  (10%) 165  (12%)157  (9%)−0.15
TG, mg/dL (>130 mg/dL)63  (7%)60  (5%)66  (8%)0.14
LDLC, mg/dL (>130 mg/dL)92  (9%)97  (11%)90  (8%)−0.13
HDLC, mg/dL (<35 mg/dL)57  (9%)59  (6%)55  (11%)−0.15
Insulin, μU/mL8.8  (5%)§ 7  10  0.37
SBP, mm Hg103  (5%)§ 96107  0.56
DBP, mm Hg63  (5%)§ 5866  0.51
  • * Because the distributions of several variables were highly skewed, median (rather than mean) levels are shown.

  • Overall sample sizes for subscapular skinfold and insulin were 7451 and 6349, respectively.

  • Values in parentheses represent proportion of persons with adverse levels of characteristic. Overweight is defined as a Quetelet index >95th P of national data.

  • § High levels of insulin, SBP, and DBP were defined as those >95th race-, sex, and age-specific P.