Table 7.

Sample composition for each study

Adult studies		BRFS	GSS	NCHRBS	NHSLS	NSFG	NSM	NSW	Overall	2000 U.S. census
Age	18–24	22.8	21.0	65.6	24.3	22.9	23.2	24.6	22.8	24.1
	25–34	36.8	38.7	21.9	39.2	38.0	50.5	66.1	37.3	35.1
	35–44	40.4	40.3	12.5	36.5	39.1	26.2	9.3	39.9	40.8
Race	White	81.0	79.6	71.8	78.2	79.8	78.4	76.5	80.6	72.3
	Black	11.4	13.4	10.2	11.8	13.7	11.6	16.4	12.3	12.8
	Other	7.6	7.0	18.0	10.0	6.5	9.9	7.1	7.2	14.8
Sex	Male	50.0	46.6	45.4	50.3	–	100.0	–	31.2	50.2
	Female	50.0	53.4	54.6	49.7	100.0	–	100.0	68.8	49.7
Marital status	Married	52.5	52.2	20.3	52.5	54.1	49.4	44.8	53.1	51.2
	Divorced, widowed, separated	11.3	13.3	7.2	11.8	14.3	10.9	10.1	12.4	11.3
	Never married	36.2	34.4	72.4	35.7	31.5	39.7	45.1	34.4	37.5
Total N		62,884	10,387	4,393	2,560	9,970	3,321	1,669	95,184