Research Article
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 | | Non responderor dropout (%) | χ 2 | |
| 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 |
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