Table 1.
Distribution of non-drinking and internet activities in percentages (frequency) presented separately for boys and girls for each survey year
| Boys | Girls | |||||
|---|---|---|---|---|---|---|
| Year | 2008 | 2010 | 2012 | 2008 | 2010 | 2012 |
| n size | 1291 | 1179 | 1028 | 1314 | 1260 | 1017 |
| Alcohol | ||||||
| Non-drinking | 42.8% | 49.8% | 52.2% | 36.1% | 39.2% | 46.0% |
| (540) | (571) | (519) | (469) | (488) | (460) | |
| Internet activities | ||||||
| Total computer time | ||||||
| ≥ 2 hours/day | 59.8% | 59.9% | 69.6% | 42.1% | 42.9% | 57.6% |
| (754) | (680) | (649) | (543) | (529) | (556) | |
| Social media/chatting | ||||||
| ≥2 hours/day (chatting) | 19.4% | 18.0% | 72.2% | 31.3% | 28.7% | 46.9% |
| (236) | (202) | (712) | (388) | (345) | (462) | |
| Computer games | ||||||
| ≥2 hours/weekday | 44.4% | 47.6% | 66.6% | 8.7% | 13.8% | 10.1% |
| (533) | (519) | (645) | (104) | (158) | (98) | |
| ≥ 2 hours/weekend day | 52.5% | 60.4% | 71.1% | 11.7% | 13.6% | 11.5% |
| (630) | (672) | (692) | (140) | (157) | (113) | |
Note. The n sizes at the top of the table include non-responders for each variable. Thus, summarizing the frequencies for all variables do not add up to the n-size for each survey year since non-responders were excluded when percentage was calculated. The rates of non-responders varied among boys from 2.3% (n = 30) for non-drinking in 2008 to 9.2% (n = 95) for total computer time in 2012. Among girls, the rates of non-responders varied from 1.2% for non-drinking in 2008 to 9.3% (n = 117) for computer games on weekdays in 2010.