Table 1.

Characteristics of the study cohort by race and sex

Study variable	Whites		Blacks		P for Race Difference
	Males (n=803)	Females (n=969)	Males (n=423)	Females (n=537)	Males	Females
Pre-Puberty (4–11 years)
Age (years)	8.1 (2.0)	7.9 (2.1)	8.2 (2.1)*	7.9 (2.0)	0.200	0.819
BMI (kg/m2)	16.5 (2.3)	16.6 (2.9)	16.5 (2.5)	16.5 (2.6)	0.986	0.662
Puberty (12–19 years)
Age (years)	16.7 (2.0)	16.7 (2.0)	17.0 (1.8)	16.9 (1.8)	0.012	0.016
BMI (kg/m2)	22.3 (4.4)**	21.6 (4.4)	22.4 (4.7)**	23.5 (5.3)	0.591	<0.001
Adulthood (20–51 years)
Age (years)	35.0 (8.9)	34.7 (9.0)	32.3 (9.4)	32.9 (9.2)	<0.001	<0.001
BMI (kg/m2)	28.5 (6.2)**	27.6 (7.5)	27.7 (7.0)**	30.3 (8.8)	0.041	<0.001
Obesity (%)	33.5	30.3	30.0**	44.7	0.241	<0.001
Smoker (%)	33.0**	32.2	36.2**	25.5	0.294	0.008
Drinker (%)	32.1**	15.8	42.1**	17.3	0.001	0.486

Sex difference within racial groups:

^*p<0.05

^**p<0.01

Data are presented in means (standard deviations) are presented unless otherwise indicated.