Table 2

Characteristics of sampled respondents by respondent type

	Retained cohort		Lost at Wave 3		Replenishment sample
	n	Per cent	n	Per cent	n	Per cent	χ²	df	p Value
Sex
Male	380	49.2	252	47.2	217	49.3	0.80	2	0.672
Female	392	50.8	282	52.8	223	50.7
Age group
18–24	132	17.1	115	21.5	64	14.5	9.01	6	0.173
25–39	263	34.1	168	31.5	147	33.4
40–54	240	31.1	150	28.1	138	31.4
55+	137	17.7	101	18.9	91	20.7
Income
Low	294	38.1	191	35.8	70	15.9	76.06	6	<0.001
Moderate	369	47.8	230	43.1	223	50.7
High	53	6.9	48	9.0	70	15.9
Not reported	56	7.3	65	12.2	77	17.5
Education
Low	474	61.5	325	61.0	240	54.5	8.59	4	0.072
Moderate	178	23.1	107	20.1	106	24.1
High	119	15.4	101	18.9	94	21.4
Marital status
Not married	456	59.1	347	65.0	317	72.0	19.79	2	<0.001
Married	316	40.9	187	35.0	123	28.0
Employment status
Not working full-time	385	49.9	247	46.5	195	44.3	4.12	2	0.128
Working full-time	386	50.1	284	53.5	245	55.7
Daily smoker
Non-daily smoker	61	7.9	56	10.5	41	9.3	2.26	2	0.323
Daily smoker	711	92.1	478	89.5	399	90.7
Previous quit attempt
Never tried to quit	232	30.1	152	28.5	127	28.9	0.38	2	0.826
Tried to quit at least once	540	69.9	382	71.5	313	71.1
Cigarettes/day
1–10	359	46.5	276	51.9	220	50.2	6.06	6	0.416
11–20	301	39.0	197	37.0	156	35.6
21–30	60	7.8	33	6.2	31	7.1
31+	52	6.7	26	4.9	31	7.1

Results are unweighted, but the survey design was accounted for in the analysis.
Rao-Scott χ² tests were used to compare differences between respondent types.