Table 1

Characteristics of the study population aged 40–74 years by sex and race/ethnicity, Third National Health and Nutrition Examination Survey, 1988–1994

		Women				Men
		African-American (n=961)	Whites (n=1641)			African-American (n=839)	Whites (n=1537)
Education (mean, y)	11.0	12.2^1-165		10.2	12.5^1-165
Poverty income ratio (mean)	2.0	3.4^1-165		2.3	3.6^1-165
Duncan SEI score (mean)	29.5	36.4^1-165		27.0	36.0^1-165
Age (mean)	54.2	57.8^1-160		55.4	58.1^1-160
Body mass index (mean)	30.3	27.4^1-165		26.9	27.4^1-150
Waist–hip ratio (mean)	0.91	0.89^1-165		0.97	1.00^1-165
Weight at age 25 (mean, kg)	60.4	57.7^1-165		73.9	74.8^1-150
Exercise score (mean)	98.5	110.2^1-165		95.0	114.6^1-160
Total kilocalories (mean, 24 hour)	1565	1643^1-160		2104	2350^1-165
Ever smoked cigarettes (%)	46.0	48.9		74.5	74.6
Current cigarette smoker (%)	27.9	20.8^1-150		43.1	25.2^1-165
Consumed 12+ alcohol drinks/year (%)	24.2	36.4^1-165		54.1	56.3
Examination time (%)
Morning	48.3	50.7		50.7	50.5
Afternoon	28.0	31.7^1-150		27.0	31.6
Evening	18.1	14.4		18.6	15.1
Fasting time (%)
0–6 hours	10.2	6.5^1-150		13.2	8.2^1-165
6⩽13 hours	46.1	54.4^1-165		42.9	53.2^1-165
13+ hours	30.8	32.6		32.1	31.7
Weekend examination (%)	31.8	27.2^1-165		28.5	28.2^1-165
Time to two hour venipuncture (mean, min)	120.3	119.9		119.6	119.5
Season of examination (%)
Summer	22.3	36.9^1-165		21.9	34.0^1-165
Winter	27.3	18.6^1-165		29.1	21.7^1-165
Spring/Autumn	50.5	44.5^1-150		49.1	44.3
Diabetic (%)	20.1	13.2^1-165		18.9	13.9^1-160