Cardiometabolic Risk Assessments by Body Mass Index z-Score or Waist-to-Height Ratio in a Multiethnic Sample of Sixth-Graders
Table 1
Description of cross-sectional sample at grade 6 ( = 5,482).
Boys ( = 2,585)
Girls ( = 2,897)
Median
Mean
SD
Median
Mean
SD
Continuous variables, units
Age, years
11.8
11.8
0.5
11.7
11.7
0.4
Weight, kg
47.8
51.0
15.6
48.2
51.4
15.1
Height, cm
149.8
150.2
8.1
151.6
151.4
7.2
Body mass index, kg/m2
21.1
22.3
5.4
20.9
22.2
5.4
BMI -score
1.118
0.958
1.090
0.917
0.827
1.075
Waist circumference, cm
72.5
75.8
15.3
72.9
75.5
14.0
WHtR
0.484
0.503
0.091
0.480
0.498
0.084
HOMA-IR
2.1
2.9
2.9
2.6
3.3
2.7
Total cholesterol/HDL cholesterol
3.0
3.1
0.9
2.9
3.1
0.8
HDL cholesterol, mmol/L
1.34
1.38
0.33
1.32
1.35
0.31
Triglycerides, mmol/L
0.84
0.99
0.59
0.87
1.01
0.57
Systolic BP, mmHg
107.5
108.1
10.2
106.5
106.8
9.7
Diastolic BP, mmHg
63.0
63.5
8.9
63.5
63.9
8.6
Glucose, mg/dL
94.0
94.4
6.6
92.0
92.6
6.6
Categorical variables, %
—
—
Fatness levela (high/lower)
45.9 / 54.1
44.6 / 55.4
Ancestryb (H/B/W/other)
52.2 / 18.4 / 21.2 / 8.2
53.9 / 19.7 / 18.0 / 8.4
Pubarche (no/yes)
73.5 / 26.5
57.2 / 42.8
High-fatness students identified by being above the sex-specific median value for both BMI -score and WHtR; the remaining students were designated as lower-fatness.
bH: Hispanic; B: non-Hispanic black; W: non-Hispanic white.
