Psychosocial Determinants of Attrition in a Longitudinal Study of Tobacco Use in Youth

Table 2

Behavioural and psychosocial characteristics at baseline as predictors of non-participation in any followup survey.

	𝑛	Non responder or dropout %	χ ^2	𝑃
Gender
Boys	1537	36.1	35.76	<0.000
Girls	1483	26.0
Born in Sweden
Yes	2817	30.4	10.51	0.001
No	195	41.5
Mother and father living together
Yes	2196	28.2	33.34	<0.000
No	805	39.3
Change of residence
No	2479	29.5	19.48	<0.000
Yes	408	40.4
Change of school
No	2681	30.2	9.92	0.002
Yes	184	41.3
Parental divorce
No	2684	30.1	17.46	<0.000
Yes	175	45.1
Death of kindred
No	2117	30.4	0.74	0.390
Yes	776	32.1
Parental unemployment
No	2607	30.0	9.88	0.002
Yes	244	39.8
Number of stressful events last year*
0	1698	28.3		<0.000
1	878	33.5	19.91
>1	390	39.0
Number of friends in leisure time
0	20	55.0		<0.000
1–4	1818	28.4	18.97
>4	1150	34.9
Ever smoker
No	2455	28.9	29.98	<0.000
Yes	556	40.8
Ever snus user
No	2846	30.8	1.50	0.221
Yes	167	35.3
Ever tobacco user
No	2397	28.7	31.23	<0.000
Yes	609	40.4

*Includes change of residence, change of school, parental divorce, death of kindred, and parental unemployment.