Table 2. Results from the three different logistic regressions on the whole sample with the adjusted odds-ratios (aOR) of brushing at least twice a day.
A. Dietary behavior. B. Health and body. C. School life.
| aOR | p-value | CI 95% | ||
|---|---|---|---|---|
| A. | ||||
| Study year 2010 versus 2006 | 1.01 | 0.7393 | 0.94 | 1.09 |
| Study year 2014 versus 2006 | 1.86 | <0.0001 | 1.7 | 2.02 |
| Boy of 13 y/o versus 11 y/o boy | 1.11 | 0,0598 | 1 | 1.24 |
| Boy of 15 y/o versus 11 y/o boy | 1.18 | 0,0037 | 1.06 | 1.32 |
| Girl of 11 y/o versus 11 y/o boy | 1.51 | <0.0001 | 1.35 | 1.69 |
| Girl of 13 y/o versus 11 y/o boy | 2.36 | <0.0001 | 2.09 | 2.65 |
| Girl of 15 y/o versus 11 y/o boy | 2.71 | <0.0001 | 2.39 | 3.07 |
| Eating breakfast daily | 1.38 | <0.0001 | 1.29 | 1.48 |
| Eating fruits daily | 1.52 | <0.0001 | 1.41 | 1.65 |
| Eating vegetables daily | 1.13 | 0.0010 | 1.05 | 1.22 |
| Eating sweets daily | 0.91 | 0.0194 | 0.83 | 0.98 |
| Drinking soft drinks daily | 0.91 | 0.0181 | 0.84 | 0.98 |
| Wealth perceived: Mid vs Low | 1.25 | 0.0008 | 1.1 | 1.43 |
| Wealth perceived: High vs Low | 1.66 | <0.0001 | 1.47 | 1.89 |
| B. | ||||
| Study year 2010 versus 2006 | 1.07 | 0.1041 | 0.99 | 1.16 |
| Study year 2014 versus 2006 | 1.96 | <0.0001 | 1.79 | 2.15 |
| Boy of 13 y/o versus 11 y/o boy | 1.07 | 0.2311 | 0.96 | 1.20 |
| Boy of 15 y/o versus 11 y/o boy | 1.04 | 0.4680 | 0.93 | 1.17 |
| Girl of 11 y/o versus 11 y/o boy | 1.57 | <0.0001 | 1.39 | 1.77 |
| Girl of 13 y/o versus 11 y/o boy | 2.31 | <0.0001 | 2.03 | 2.62 |
| Girl of 15 y/o versus 11 y/o boy | 2.54 | <0.0001 | 2.23 | 2.89 |
| Cantril ≥ 6 | 1.19 | 0.0007 | 1.08 | 1.31 |
| BMI: Overweight or obese | 0.65 | <0.0001 | 0.58 | 0.73 |
| Excellent perceived health | 1.30 | <0.0001 | 1.21 | 1.41 |
| Body image: too thin vs normal | 0.93 | 0.1880 | 0.84 | 1.04 |
| Body image: too fat vs normal | 0.88 | 0.0037 | 0.80 | 0.96 |
| Wealth perceived: Mid vs Low | 1.16 | 0.0456 | 1.00 | 1.33 |
| Wealth perceived: High vs Low | 1.47 | <0.0001 | 1.29 | 1.69 |
| C. | ||||
| Study year 2010 versus 2006 | 1.02 | 0.6111 | 0.94 | 1.11 |
| Study year 2014 versus 2006 | 1.86 | <0.0001 | 1.70 | 2.04 |
| Boy of 13 y/o versus 11 y/o boy | 1.15 | 0.0147 | 1.03 | 1.29 |
| Boy of 15 y/o versus 11 y/o boy | 1.18 | 0.0049 | 1.05 | 1.33 |
| Girl of 11 y/o versus 11 y/o boy | 1.56 | <0.0001 | 1.39 | 1.76 |
| Girl of 13 y/o versus 11 y/o boy | 2.32 | <0.0001 | 2.06 | 2.61 |
| Girl of 15 y/o versus 11 y/o boy | 2.62 | <0.0001 | 2.31 | 2.97 |
| Having academic delay | 0.80 | <0.0001 | 0.72 | 0.88 |
| Perceived school grades: Mid | 1.03 | 0.6189 | 0.92 | 1.15 |
| Perceived school grades: High | 1.24 | 0.0002 | 1.11 | 1.40 |
| Liking school | 1.02 | 0.6955 | 0.94 | 1.10 |
| Demand from school: Mid | 0.94 | 0.1313 | 0.87 | 1.02 |
| Demand from school: High | 0.90 | 0.0633 | 0.81 | 1.01 |
| Classmate’s support: Mid | 1.17 | 0.0049 | 1.05 | 1.30 |
| Classmate’s support: High | 1.29 | <0.0001 | 1.15 | 1.45 |
| Being bullied | 0.84 | <0.0001 | 0.78 | 0.90 |
| Bullying others | 0.86 | <0.0001 | 0.80 | 0.93 |
| Wealth perceived: Mid vs Low | 1.19 | 0.0112 | 1.04 | 1.36 |
| Wealth perceived: High vs Low | 1.56 | <0.0001 | 1.37 | 1.77 |
For variables with 3 levels, the “Low” level was used as reference. Due to the interaction, age and sex are described as one variable with 6 levels, the reference level being a boy of 11 y/o. Significant values at p<0.0001 in bold.
The reference level is a boy of 11 y/o in 2006. For example, on Table 2a, being a boy of 11 y/o in 2014 gives an aOR of 1.86 in favor of brushing at least twice a day versus a boy of 11 y/o in 2006. No significant interactions were identified, so the aOR of brushing at least twice a day for a 15 y/o girl in 2014 versus a 15 y/o girl in 2006 is not significantly different from 1.86.