Table 1

Wave 1 sample sizes for completed interviews and collected biospecimen types, overall and by selected demographic subgroups

	Wave 1 sample size
	Youth interview	Adults
			Collected biospecimens
		Interview	Urine	Blood	Buccal*	Urine and blood	All 3*
Overall	13 651	32 320	21 801	14 520	12 543	13 856	6950
Age (years)
12–17	13 651†
18–24		9112	6459	3886	3866	3659	1839
25–34		6338	4380	2826	2470	2712	1315
35–44		4931	3361	2178	1790	2102	1006
45–54		4846	3164	2276	1859	2181	1138
55–64		3972	2561	1915	1458	1831	943
65+		3110	1873	1438	1100	1370	709
Gender
Man	6971	16 309	10 763	6920	6155	6633	3367
Woman	6641	15 982	11 025	7594	6381	7217	3580
Race/ethnicity
White, non-Hispanic	6478	19 299	12 818	8895	7474	8509	4312
Black, non-Hispanic	1801	4496	3168	1913	1758	1815	872
Hispanic	3880	5536	3870	2452	2241	2335	1216
American Indian or Alaska Native, non-Hispanic	70	195	138	102	86	93	44
Asian/Native Hawaiian or Other Pacific Islander, non-Hispanic	394	966	543	299	290	285	126
Multiple races, non-Hispanic	767	1269	929	655	511	623	287

Note that because of the differential sampling rates for different demographic and tobacco-use groups in the PATH Study, the sample sizes reported in these tables cannot be used to estimate population percentages in different demographic categories. Weights need to be used to calculate estimates from the PATH Study.
*Buccal cells were collected during a portion of Wave 1 (ended on 18 May 2014).
†For a small number of cases, rather than a specific age, only an age range between 12 and 17 years was available.