Table 2.
Independent variables
| Composite variables | n (%) | Total (100%) | Original variables | n (%) | Total (100%) |
|---|---|---|---|---|---|
| Family affluence | Family car | ||||
| High | 1689 (52.5) | 3217 | None | 104 (3.2) | 3271 |
| Medium | 1279 (39.8) | One | 1044 (31.9) | ||
| Low | 249 (7.7) | Two or more | 2123 (64.9) | ||
| Own bedroom | |||||
| No | 1130 (34.7) | 3253 | |||
| Yes | 2123 (65.3) | ||||
| Holiday with family | |||||
| Not at all | 298 (9.1) | 3261 | |||
| Once | 905 (27.8) | ||||
| Two or more times | 1058 (63.1) | ||||
| No. of computers | |||||
| None | 55 (1.7) | 3267 | |||
| One | 1155 (35.4) | ||||
| Two or more | 2057 (62.9) | ||||
| School environment | Students like being together | ||||
| Favourable | 809 (25.0) | 3231 | Agree | 2796 (85.3) | 3276 |
| Medium | 1615 (50.0) | Undecided or disagree | 480 (14.7) | ||
| Poor | 807 (25.0) | Students kind and helpful | |||
| Agree | 2093 (64.0) | 3272 | |||
| Undecided or disagree | 1179 (36.0) | ||||
| Accepted by students | |||||
| Agree | 2499 (76.5) | 3267 | |||
| Undecided or disagree | 768 (23.5) | ||||
| Liking school | |||||
| A lot | 2094 63.9) | 3279 | |||
| Less than a lot | 1185 (36.1) | ||||
| Academic achievement | |||||
| Good or very good | 1789 (54.7) | 3269 | |||
| Average or below | 1480 (45.3) | ||||
| Pressured by schoolwork | |||||
| Not pressured | 345 (10.5) | 3277 | |||
| Pressured | 2932 (89.5) | ||||
| Peer group | Friends same gender | ||||
| Favourable | 793 (24.8) | 3195 | 3 or more | 2488 (75.9) | 3279 |
| Medium | 1600 (50.1) | Up to 2 | 791 (24.1) | ||
| Low | 802 (25.1) | Friends different gender | |||
| 3 or more | 1791 (55.3) | 3241 | |||
| Up to 2 | 1450 (44.7) | ||||
| After school with friends | |||||
| 4 or more days a week | 1266 (38.9) | 3257 | |||
| 3 or fewer days a week | 1991 (61.1) | ||||
| Electronic communication | |||||
| Every day | 1857 (43.2) | 3272 | |||
| Less often | 1415 (56.8) | ||||
| Non-composite variables | |||||
| Municipality size | Gender | ||||
| Metropolitan | 806 (24.5) | 3291 | Male | 1702 (51.7) 3291 | |
| <10,000 | 456 (13.9) | Female | 1589 (48.3) | ||
| 10,000-50,000 | 797 (24.2) | Nutritional status | |||
| >50,000 | 1232 (37.4) | Underweight | 53 (2.0) 2640 | ||
| Normal weight | 2192 (83.0) | ||||
| Overweight | 342 (13.0) | ||||
| Obese | 53 (2.0) |