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Latent class patterns over six years with number of respondents classified to each pattern
| Pattern | Year1 | Year 3 | Year 5 | Year 7 | N (%) |
| 1 | — | — | — | — | 593 (42%) |
| 2 | — | — | PD | PD | 28 (2%) |
| 3 | PD | — | — | — | 185 (13%) |
| 4 | PD | PD | — | — | 77 (5%) |
| 5 | PD | PD | PD | PD | 542 (38%) |
Notes: PD = problem drinker; “—” indicates not problem drinker.
