Table 2 Modelled student and school level characteristics associated with assent to data linkage
| Data linkage sub-sample (n = 18,956) | |||||
|---|---|---|---|---|---|
| Bivariate models |
Multivariable model | ||||
| Consented to data linkage, n/N (%) | OR (95% CIs) | Wald test | AOR (95% CIs)c | Wald test | |
| Student-level | |||||
| Gender | |||||
| Male | 4654/9545 (48.8) | 1.00 | 1.00 | ||
| Female | 4465/9064 (49.3) | 1.01 [0.95, 1.07] | 1.02 [0.95, 1.08] | ||
| Did not state | 113/347 (32.6) | 0.52 [0.41, 0.65] | X2(2) = 31.55 | 0.65 [0.50, 0.86] | X2(2) = 10.26 |
| School grade | |||||
| Year 7 | 1980/3787 (52.3) | 1.00 | 1.00 | ||
| Year 8 | 2125/4122 (51.6) | 0.97 [0.89, 1.07] | 0.99 [0.90, 1.09] | ||
| Year 9 | 1969/4347 (45.3) | 0.74 [0.68, 0.81] | 0.76 [0.69, 0.83] | ||
| Year 10 | 1696/3500 (48.5) | 0.88 [0.80, 0.96] | 0.93 [0.84, 1.03] | ||
| Year 11 | 1462/3200 (45.7) | 0.77 [0.70, 0.85] | X2(4) = 67.55 | 0.81 [0.73, 0.90] | X2(4) = 51.32 |
| Weekly smoker | |||||
| No | 8794/17,656 (49.8) | 1.00 | 1.00 | ||
| Yes | 219/571 (38.4) | 0.66 [0.55, 0.78] | 1.02 [0.81, 1.30] | ||
| Past month cannabis use | |||||
| No | 8848/17,799 (49.7) | 1.00 | 1.00 | ||
| Yes | 279/699 (39.9) | 0.67 [0.57, 0.78] | 0.86 [0.70, 1.06] | ||
| Ever truant | |||||
| No | 6988/13,666 (51.1) | 1.00 | 1.00 | ||
| Yes | 2007/4455 (45.1) | 0.78 [0.73, 0.84] | 0.91 [0.85, 0.99] | ||
| Ever excluded | |||||
| No | 8633/17,216 (50.2) | 1.00 | 1.00 | ||
| Yes | 511/1304 (39.2) | 0.65 [0.58, 0.74] | 0.82 [0.72, 0.94] | ||
| SWEMWBS (sd.) | 22.415 (4.23) | 1.03 [1.03, 1.04] | 1.02 [1.01, 1.03] | ||
| FAS (sd.) | 9.457 (2.29) | 1.03 [1.02, 1.05] | 1.02 [1.01, 1.04] | ||
| School-level | |||||
| Mean FAS (sd.) | 9.397 (0.50) | 1.38 [1.04, 1.85] | 1.36 [1.02, 1.83] | ||
| ICC – constant only | 0.071 | ||||
| ICC – Student level | 0.071 | ||||
| ICC – Level 1 & 2 variables | 0.064 | ||||