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

Table 3

Behavioural and psychosocial characteristics at followup as predictors of subsequent non-participation.

	Grade when measured	𝑛	Non responderor dropout (%)	χ ^2	𝑃
Any adult to confide in	6
Yes		2777	28.4	0.29	0.591
No		89	25.8
Ever smoker	7
No		1530	19.6	67.65	<0.000
Yes		1342	33.1
Ever snus user	7
No		2289	22.4	72.63	<0.000
Yes		587	39.7
Any alcohol use during latest term	7
No		1756	22.9	19.27	<0.000
Yes		1100	30.3
Intoxication drinking latest term	7
No		962	27.7	7.32	0.007
Yes		477	34.6
Ever smoker	8
No		1197	16.0	46.97	<0.000
Yes		1608	26.9
Ever snus user	8
No		1943	17.8	72.91	<0.000
Yes		861	32.3
Truancy latest term (days)	8
0		1980	19.0	50.00	<0.000
1–3		483	26.3
≥4		313	35.8
Own beliefs of teachers judgement of school proficiency compared to classmates	8
Very good		436	20.9	30.48	<0.000
Good		1219	18.5
Average		984	25.4
Below average		113	37.2
Own judgement of school proficiency compared to classmates	8
Very good		559	24.2	28.92	<0.000
Good		1270	17.5
Average		820	27.0
Below average		100	25.0