Table 3.
Model | Log- likelihood | Sample size- adjusted BIC | β(SE) | Δχ2a | P |
Base | −6,235.57 | 12,548.29 | – | – | – |
Ethnicity as covariate | −6,234.66 | 12,550.34 | – | 1.77 | .1830 |
Tests of DIF | |||||
Tolerance | −6,231.50 | 12,547.88 | .40 (.16) | 6.46 | .0110 |
Withdrawal | −6,222.60 | 12,530.07 | .88 (.18) | 24.15 | <.0001 |
Larger/longer | −6,231.12 | 12,547.13 | .46 (.18) | 5.60 | .0180 |
Cut down/control | −6,232.61 | 12,550.09 | .29 (.15) | 3.94 | .0471 |
Time spent | −6,232.09 | 12,549.05 | .37 (.16) | 5.15 | .0232 |
Reduced activities | −6,234.16 | 12,553.19 | .21 (.22) | 0.95 | .3297 |
Caused problems | −6,222.43 | 12,529.75 | −.77 (.16) | 24.48 | <.0001 |
Role failure | −6,230.84 | 12,546.57 | −.52 (.19) | 7.81 | .0052 |
Hazardous use | −6,226.80 | 12,538.49 | −.56 (.14) | 15.73 | <.0001 |
Social problems | −6,229.26 | 12,543.40 | −.62 (.20) | 10.36 | .0013 |
Notes: Bolded text indicates significant result at p < .01. BIC = Bayesian information criterion; DIF = differential item functioning.
All chi-square difference tests have 1 df.