Daily smoking: odds ratios (95% confidence intervals) for pupil and school level variables from multilevel logistic regression (models E–J)
| E | F | G | H | I | J | |
| Constant | −3.26 | −4.00 | −3.03 | −4.52 | −5.18 | −4.32 |
| Sex | ||||||
| Boy | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Girl | 1.55 (1.13 to 2.12) | 1.58 (1.15 to 2.16) | 1.58 (1.15 to 2.16) | 1.57 (1.08 to 2.26) | 1.59 (1.10 to 2.30) | 1.57 (1.09 to 2.28) |
| Mother smokes? | ||||||
| No | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Yes | 2.51 (1.83 to 3.45) | 2.48 (1.81 to 3.40) | 2.50 (1.82 to 3.43) | 1.65 (1.13 to 2.40) | 1.62 (1.11 to 2.37) | 1.61 (1.10 to 2.36) |
| N/A | 1.04 (0.97 to 1.12) | 1.04 (0.97 to 1.12) | 1.05 (0.97 to 1.13) | 1.01 (0.93 to 1.09) | 1.00 (0.92 to 1.09) | 1.01 (0.93 to 1.10) |
| Parents expect too much at school? | ||||||
| No | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Yes | 2.17 (1.60 to 2.94) | 2.17 (1.60 to 2.95) | 2.16 (1.59 to 2.94) | 1.84 (1.28 to 2.63) | 1.84 (1.28 to 2.64) | 1.84 (1.28 to 2.64) |
| Alienation score (OR per unit increase) | 1.85 (1.59 to 2.15) | 1.82 (1.56 to 2.11) | 1.86 (1.60 to 2.17) | 1.43 (1.20 to 1.71) | 1.42 (1.19 to 1.69) | 1.46 (1.22 to 1.74) |
| Best friend smokes? | ||||||
| No | 1.00 | 1.00 | 1.00 | |||
| Yes, sometimes | 2.37 (1.17 to 4.78) | 2.41 (1.20 to 4.85) | 2.41 (1.19 to 4.85) | |||
| Yes, daily | 30.0 (18.2 to 49.2) | 29.3 (17.9 to 47.8) | 29.8 (18.1 to 48.9) | |||
| Policy | ||||||
| Strong | 1.00 | 1.00 | ||||
| Average | 2.19 (1.11 to 4.35) | 2.04 (1.04 to 4.00) | ||||
| Weak | 3.52 (1.55 to 7.97) | 2.77 (1.25 to 6.12) | ||||
| Pupil enforcement | ||||||
| High | 1.00 | 1.00 | ||||
| Low | 1.63 (1.08 to 2.45) | 1.52 (1.03 to 2.24) | ||||
| School level variance(SE) | 0.295 (0.119) | 0.202 (0.101) | 0.251 (0.111) | 0.077 (0.098) | 0.036 (0.089) | 0.066 (0.096) |
| Wald χ2 (df) | 127.9 (5) | 9.11 (2) | 5.40 (1) | 221.7 (2) | 6.40 (2) | 4.49 (1) |
| p Value for contrasts of terms (added to model): | p < 0.0001 (A) | p = 0.011 (E) | p = 0.020 (E) | p < 0.0001 (E) | p = 0.041 (H) | p = 0.034 (H) |