Table 2.

Comparison of selected characteristics of fifth grade never smokers who did/did not provide data in 11th grade, AdoQuest 2005–2011 (n = 1,553)

	Provided data in 11th grade
	Yes, (n = 1,071)	No (n = 482)	p
Sociodemographic
Male, %	42.0	48.6	.014
Age at baseline, mean (SD)	10.7	10.8	.020
Mother university educated, %	33.9	27.6	.153
French speaking, %	89.3	88.7	.979
Smoking in the social environment
Father smokes, %	21.1	29.0	.001
Mother smokes, %	18.1	24.9	.002
Sibling(s) smoke, %	6.8	9.1	.114
Friends smoke, %	9.5	12.7	.063
Smoking allowed anywhere at home, %	57.7	53.9	.162
≥ Two persons smoke at home, %	10.3	12.8	.092
≥ 3 days exposed to smoking in car in last week, %	12.3	19.6	.000
Psychological
Perceived academic performance, % ≤ average	45.0	34.8	.000
Depressive symptoms, mean (SD)	1.9 (.68)	1.9 (.67)	.064
School connectedness, mean (SD)	1.7 (.54)	1.8 (.61)	.030
Lifestyle indicators
Use other tobacco products, %	10.9	12.2	.461
TV ≥ 3 hours per day, % yes	36.5	42.0	.040
Weight goals (taking action), % yes	39.1	42.9	.190
Perceived need for cigarettes
Really need a cigarette, % yes	1.2	3.2	.009
Crave cigarette, % yes	3.1	4.4	.232

SD = standard deviation.