Table 1.

Characteristics of the Samples

	NHANES III (N = 14,912)	NHANES 1999–2004 (N = 12,752)
Mean age, y	44.43 (SD = 18.47)	45.59 (SD = 15.32)
Died (before 2000), %	9.14
Female, %	52.14	51.92
White (and others), %	80.55	75.93
Black, %	10.62	10.37
Hispanic, %	8.83	13.69
Poor (poverty ratio ≤1.25), %	17.54	21.60
Current smoking, %	28.46
Heavy drinking, %	10.75
No exercise, %	61.12
Low BMI (<18.5), %	2.45
High BMI(> = 30), %	22.22

Note: NHANES = National Health and Nutrition Examination Survey; SD = standard deviation; BMI = body mass index.