Classification of binge drinking (BD) during the period 18–25 years according to frequency during the periods 18–21 years and 22–25 years (n=166)
| 22–25 years | |||
| 18–21 years | Never | Occasional | Frequent |
| Never | Never (19) | Occasional (6) | Frequent (0) |
| Occasional | Occasional (0) | Occasional (43) | Frequent (6) |
| Frequent | Frequent (1) | Frequent (16) | Frequent (75) |
For example, six participants who had occasional BD during the period 18–21 years and frequent BD during the period 22–25 years were categorised as frequent BD during the period 18–25 years.