Table I.

Description of all adolescents (12–19 y) in sample, NHANES 1988–1994 to 2007–2010^*,^†

	1988–1994 N = 2748	1999–2002 N = 4004	2003–2006 N = 3824	2007–2010 N = 2138	P trend
Age, y	15.4 (0.1)	15.5 (0.1)	15.5 (0.1)	15.5 (0.1)	.43
Sex, % male	51.0 (1.8)	51.4 (1.0)	51.8 (1.1)	52.1 (1.2)	.61
Race/ethnicity
White (non-Hispanic), %	67.1 (2.4)	58.9 (2.0)	63.0 (2.8)	58.9 (2.8)	.13
Black (non-Hispanic), %	14.7 (1.3)	14.2 (1.7)	15.2 (1.8)	14.2 (1.2)	.99
Mexican-American, %	8.6 (1.0)	10.9 (1.4)	11.6 (1.5)	13.6 (1.9)	.02
Other, %	9.5 (1.6)	16.1 (2.1)	10.2 (1.1)	13.3 (1.7)	.77
Overweight (BMI 85th – <95th percentile), %	15.9 (1.0)	15.8 (0.8)	17.6 (0.9)	17.7 (1.0)	.09
Obese (BMI ≥95th percentile), %	11.2 (1.0)	18.1 (0.8)	19.2 (1.3)	20.0 (1.1)	<.0001
Severe obesity (BMI ≥99th percentile), %	1.5 (0.4)	3.6 (0.5)	4.6 (0.6)	5.5 (0.9)	<.0001
BMI, z-score	0.38 (0.03)	0.54 (0.03)	0.60 (0.04)	0.64 (0.03)	<.0001
Waist circumference, cm	77.0 (0.5)	80.5 (0.4)	81.8 (0.5)	81.7 (0.4)	<.0001

^*Weighted estimates.

^†Figures presented are means (SE) unless indicated as %.