Table 2.

Descriptive statistics

Variable	NHANES 2009-2010		NHANES 2011-2012
	Mean	Weighted Mean	Mean	Weighted Mean
Measures of current tobacco use
Reported tobacco user	0.252	0.250	0.241	0.245
Tested tobacco user (cotinine level > 15 ng/mL)	0.242	0.239	0.231	0.229
Tested tobacco user (cotinine level >8 ng/mL)	0.253	0.249	0.240	0.237
Tested tobacco user (cotinine level >3 ng/mL)	0.263	0.259	0.257	0.250
Gender
Male	0.495	0.494	0.507	0.493
Race/Ethnicity
Mexican American	0.186	0.086	0.095	0.073
Other Hispanic	0.103	0.050	0.103	0.063
Non Hispanic Black	0.168	0.105	0.258	0.107
Non Hispanic White	0.487	0.697	0.388	0.686
Mixed or other race/ethnicity	0.049	0.062	0.157	0.072
Age
20-25 years	0.090	0.092	0.108	0.102
25-50 years	0.455	0.503	0.447	0.486
50-65 years	0.232	0.243	0.247	0.256
Over 65 years	0.224	0.162	0.204	0.157
Education
College graduate or above	0.205	0.281	0.260	0.316
Some college or AA degree	0.284	0.305	0.307	0.326
High school graduate/ GED or equivalent	0.230	0.229	0.211	0.203
9-11th grade	0.159	0.124	0.136	0.105
Less than 9th grade	0.121	0.061	0.086	0.050
Marital status
Married	0.523	0.569	0.482	0.532
Widowed	0.084	0.059	0.079	0.054
Divorced	0.108	0.099	0.104	0.108
Separated	0.032	0.023	0.036	0.022
Never married	0.168	0.173	0.219	0.200
Living with a partner	0.084	0.078	0.079	0.084
Body structure
Underweight	0.014	0.017	0.018	0.015
Normal	0.262	0.284	0.290	0.287
Overweight	0.341	0.338	0.324	0.341
Obese	0.383	0.362	0.367	0.357
Other
US citizen	0.846	0.900	0.862	0.912
Number of (additional) smokers at home	0.244	0.229	0.221	0.201
Pregnant	0.011	0.011	0.009	0.010
Exposed to tobacco smoke at home	0.160	0.148	0.142	0.123
Exposed to tobacco smoke at work	0.077	0.085	0.080	0.087
Early initiator (before 16 years)	0.151	0.143	0.139	0.148
Consume Alcohol	0.736	0.780	0.737	0.803