Table 3.

Prevalence of categorical variables by wave I smoking stage among original population of size n = 11 107 426.^†

		Wave I smoking stage
Covariates		Puffer	Light	Occasional	Regular	Ex-smoker
Percentage female	Overall	0.50	0.48	0.48	0.49	0.48
	Recant = no	0.48	0.47	0.48	0.50	0.48
	Recant = yes	0.57	0.51	0.49	0.21	0.52
	P-value	0.047*	0.451	0.872	< 0.001***	0.723
Race/ethnicity
White	Overall	0.56	0.66	0.70	0.85	0.75
Black		0.23	0.14	0.12	0.03	0.09
Hispanic		0.13	0.12	0.11	0.07	0.10
Asian		0.04	0.03	0.02	0.01	0.02
Other		0.05	0.05	0.04	0.05	0.03
White	Recant = no	0.59	0.73	0.74	0.86	0.78
Black		0.20	0.09	0.09	0.03	0.08
Hispanic		0.13	0.11	0.10	0.07	0.08
Asian		0.04	0.02	0.02	0.01	0.02
Other		0.05	0.04	0.05	0.04	0.04
White	Recant = yes	0.44	0.48	0.50	0.71	0.46
Black		0.37	0.26	0.28	0.08	0.22
Hispanic		0.11	0.15	0.17	0.08	0.30
Asian		0.03	0.04	0.03	0.00	0.00
Other		0.05	0.07	0.02	0.13	0.02
	P-value	< 0.001***	< 0.001***	< 0.001***	0.122	< 0.001***
Poverty rate	Overall	0.33	0.26	0.25	0.30	0.26
	Recant = no	0.31	0.23	0.22	0.29	0.25
	Recant = yes	0.40	0.36	0.43	0.46	0.39
	P-value	0.080	< 0.001***	< 0.001***	0.233	0.310
Education (percentage   beyond high school)	Overall	0.60	0.62	0.62	0.56	0.65
	Recant = no	0.62	0.65	0.64	0.56	0.68
	Recant = yes	0.51	0.54	0.52	0.41	0.39
	P-value	0.033*	0.011*	0.017*	0.248	0.011*

^*P < 0.05;

^***P < 0.001.

^†P-values for prevalence differences between recanters and non-recanters calculated using survey estimation commands in Stata 9.0 (StataCorp. [22]).