Table 1. Variables included in the analyses and distribution of answers.
| First-order latent variables | Indicating variables for first-order latent variables (number of respondents) | Answer alternatives | Frequency (%) | ||
|---|---|---|---|---|---|
| Socio-economic status | Father's occupation (10,395) | Unemployed or long-term sick-listed | 6.3 | ||
| Study, parental leave/house-husband or other activity | 4.9 | ||||
| Employed | 88.8 | ||||
| Mother's occupation (10,483) | Unemployed or long-term sick-listed | 8.8 | |||
| Study, parental leave/housewife or other activity | 9.5 | ||||
| Employed | 81.7 | ||||
| Type of housing (10,479) | Leasehold flat | 13.5 | |||
| Cooperative or time-share apartment | 9.2 | ||||
| Townhouse, semi-detached house or villa | 77.3 | ||||
| Gender | Gender (10,519) | Boys | 50.0 | ||
| Girls | 50.0 | ||||
| Smoking | Smoking (10,422) | No (I have never smoked, I have tried, I have stopped) | 81.4 | ||
| Yes (I smoke occasionally or daily) | 18.6 | ||||
| Alcohol consumption | Alcohol consumption last 12 months (10,282)a | Never | 48.2 | ||
| Less than every second month – about once/month | 33.6 | ||||
| Twice/month – more than 4 times/week | 18.2 | ||||
| Drunkenness last 12 monthsb (5706) | Never or in a sporadic manner | 31.1 | |||
| Some or a few times per year | 26.0 | ||||
| Once/month | 17.9 | ||||
| Twice/month – daily | 25.0 | ||||
| How often in drunken state when drinkingb (5677) | Never/seldom | 38.0 | |||
| Occasionally | 18.2 | ||||
| Almost every time–every time | 43.8 | ||||
| Regular meal habits | How often do you eat the following meals during a normal week? | ||||
| Breakfast (10,410) | Seldom/never | 8.2 | |||
| 1–3 days | 8.4 | ||||
| 4–6 days | 15.1 | ||||
| Every day | 68.3 | ||||
| Cooked lunch (10,383) | Seldom/never | 3.4 | |||
| 1–3 days | 7.7 | ||||
| 4–6 days | 27.5 | ||||
| Every day | 61.4 | ||||
| Cooked food in the evening (10,391) | Seldom/never | 2.0 | |||
| 1–3 days | 3.9 | ||||
| 4–6 days | 13.7 | ||||
| Every day | 80.4 | ||||
| Physical activity | Physical activity/day except for exercising (10,259) | Less than 15 min | 10.3 | ||
| 15–30 min | 36.2 | ||||
| 31–60 min | 28.3 | ||||
| More than 1 hour | 25.2 | ||||
| Exercise in spare time more than 30 minutes/day (10,333) | 0–3 times/month | 20.6 | |||
| 1–3 times/week | 46.0 | ||||
| 4 times/week – every day | 33.3 | ||||
| Organised physical activity during the last 12 months (10,376) | No | 29.1 | |||
| Yes | 70.9 |
aResponse alternatives were ‘never’, ‘every second month or less than every second month’, ‘about once per month’, ‘two to four times/per month’, ‘two to three times per week’ and ‘four times per week or more’ for adolescents aged 15–18 years and ‘never’, ‘every second month or less than every second month’, ‘about once per month’ and ‘twice per month or more often’ for adolescents aged 13–14 years.
bQuestion was asked of adolescents aged 15–16 years and 17–18 years.