| Variable | Univariate | Multivariate | AIC | BIC | ||||
| Odds Ratio | t-value | p-value | Odds Ratio | t-value | p-value | |||
| Headache | 3.52 | 225.55 | 0.00 | 2.71 | 113.93 | 0.00 | 592,984.99 | 593,037.67 |
| Stomachache | 2.31 | 165.77 | 0.00 | 1.34 | 35.17 | 0.00 | 580,175.19 | 580,238.36 |
| Sleep problem | 1.72 | 128.51 | 0.00 | 1.13 | 17.44 | 0.00 | 549,983.97 | 550,057.31 |
| Unhappy, sad or depressed | 1.64 | 121.40 | 0.00 | 1.01 | 1.14 | 0.25 | 547,296.50 | 547,380.29 |
| Gender | 2.36 | 115.31 | 0.00 | 1.40 | 27.93 | 0.00 | 522,916.45 | 523,010.34 |
| Dissatisfied with self | 1.65 | 103.22 | 0.00 | 1.06 | 7.67 | 0.00 | 503,136.32 | 503,240.29 |
| Shirk school | 1.36 | 78.63 | 0.00 | 1.07 | 10.73 | 0.00 | 495,744.06 | 495,858.31 |
| Binge drinking | 1.29 | 73.92 | 0.00 | 1.16 | 30.87 | 0.00 | 358,100.09 | 358,220.78 |
| Conflict with parents | 0.73 | −69.17 | 0.00 | 0.96 | −5.44 | 0.00 | 354,623.16 | 354,753.79 |
| Bullied | 0.81 | −58.92 | 0.00 | 0.97 | −5.61 | 0.00 | 352,847.80 | 352,988.41 |
| Coffee consumption | 1.41 | 52.32 | 0.00 | 1.15 | 18.30 | 0.00 | 304,843.74 | 304,992.16 |
| Spare-time job | 0.85 | −38.63 | 0.00 | 0.94 | −8.91 | 0.00 | 298,946.35 | 299,104.38 |
| Academic achievement | 1.14 | 20.92 | 0.00 | 1.04 | 5.01 | 0.00 | 296,231.56 | 296,399.31 |
| Sport achievement | 1.08 | 16.38 | 0.00 | 0.95 | 5.49 | 0.00 | 295,567.90 | 295,745.48 |
| Academic ambitions | 1.03 | 3.89 | 0.00 | 0.97 | −2.63 | 0.01 | 291,860.90 | 292,048.10 |
| N |
|
|
|
|
|
|
| 140,481 |
| Pseudo-R2 |
|
|
|
|
|
|
| 0.13 |