Table 1.
Logistic regression: covariates associated with probable PTSD 6 months post-TBI - sensitivity analysis of imputed data (full cohort).
| Covariate | B (SE(B)) | Odds ratio (95% CI) | p-valueb | VIF (range)c |
|---|---|---|---|---|
| Age | -.026 (.004) | .97 (.96–.99) | < .001 | 1.30 |
| Sex (male) | .26 (.16) | 1.29 (.96–1.94) | .13 | 1.07–1.08 |
| Educational levela | 1.16–1.19 | |||
| Primary school or less | .32 (.43) | 1.38 (.85–2.41) | .48 | |
| Secondary school/high school | .29 (.26) | 1.33 (.83–1.99) | .29 | |
| Post-high school training | .26 (.30) | 1.30 (.71–2.32) | .41 | |
| Psychiatric historyd | .71 (.29) | 2.03 (1.52–2.93) | .041 | 1.01 |
| GCS | .038 (.021) | 1.04 (.99–1.07) | .083 | 1.09 |
| TMT-(B-A) | .25 (.065) | 1.28 (1.13–1.50) | <.001 | 1.22–1.25 |
| RAVLT Delayed recall | -.22 (.085) | .80 (.65–.99) | .013 | 1.36–1.41 |
Note:a Reference category: College/University, b Significance level p < .01, c VIF = variance inflation factor (range) of the original and 5 imputed datasets, d Information about the psychiatric history and type of psychiatric disorder(s) was obtained by interview from the patient and/or carer upon admission. Nagelkerke R2 = 0.074.