| Univariate analysis | Multivariate analysis | ||
---|---|---|---|---|
Factors* | Odds ratio (95% CI) | p | Odds ratio (95% CI) | p |
Gender | Â | 0.003 | Â | 0.002 |
   Boys (n = 397) | 1 |  | 1 |  |
   Girls (n = 482) | 1.44 (1.14-1.83) |  | 1.72 (1.23-2.40) |  |
Self-esteem | Â | < 0.0001 | Â | 0.0001 |
   Positive (n = 61) | 1 |  | 1 |  |
   Normal (n = 595) | 2.61 (1.39-4.91) | < 0.0001 | 2.55 (1.26-5.14) | 0.0002 |
   Negative (n = 223) | 1.51 (0.82-2.78) | 0.71 | 1.23 (0.63-2.39) | 0.20 |
BMI | Â | < 0.0001 | Â | < 0.0001 |
   Underweight (n = 84) | 1 |  | 1 |  |
   Average-weight (n = 598) | 2.54 (1.32-4.87) | 0.005 | 3.85 (1.72-8.60) | 0.001 |
   Overweight (n = 165) | 6.72 (3.37-13.4) | < 0.0001 | 11.2 (4.78-26.1) | < 0.0001 |
   Obese (n = 32) | 14.9 (6.10-36.7) | < 0.0001 | 29.8 (9.82-90.5) | < 0.0001 |
Province | Â | 0.06 | Â | 0.06 |
   Palermo (n = 238) | 1 |  | 1 |  |
   Catania (n = 243) | 0.86 (0.63-1.18) | 0.46 | 0.78 (0.52-1.17) | 0.69 |
   Caltanissetta (n = 250) | 0.78 (0.57-1.06) | 0.80 | 0.78 (0.52-1.18) | 0.70 |
   Messina (n = 148) | 0.61 (0.42-0.88) | 0.03 | 0.49 (0.29-0.83) | 0.02 |