Table 4.
Linear regression models: cognitive tests associated with the four PTSD symptom clusters – primary analysis.
| Covariates | Intrusion cluster |
Avoidance cluster |
Cognition/Mood cluster |
Arousal cluster |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| B(SE) | p-valueb | B(SE) | p-valueb | VIF (range)c | B(SE) | p-valueb | B(SE) | p-valueb | VIF (range)c | |
| Age | -.037 (.007) | < .001 | -.019 (.003) | < .001 | 1.33–1.34 | -.048 (.009) | < .001 | -.036 (.008) | < .001 | 1.15–1.16 |
| Sex (Male) | .21 (.23) | .36 | .10 (.12) | .38 | 1.05 | .42 (.34) | .22 | .78 (.29) | .007 | 1.03–1.04 |
| Educational levela | 1.13–1.15 | 1.11–1.13 | ||||||||
| Primary school or less | .77 (.39) | .049 | .023 (.19) | .90 | -.061 (.55) | .91 | .53 (.47) | .26 | ||
| Secondary school/high school | .71 (.29) | .016 | .22 (.13) | .11 | .39 (.40) | .33 | .59 (.34) | .084 | ||
| Post-high school training | .33 (.30) | .26 | .085 (.15) | .57 | .19 (.44) | .67 | .67 (.38) | .082 | ||
| Psychiatric historyd | 1.19 (.34) | .001 | .53 (.17) | .002 | 1.01 | 2.39 (.49) | < .001 | 1.88 (.42) | < .001 | 1.01 |
| GCS | .081 (.031) | .010 | .026 (.016) | .092 | 1.09–1.10 | -.073 (.045) | .10 | .032 (.039) | .41 | 1.08 |
| TMT-(B-A) | .41 (.12) | .001 | .21 (.061) | .001 | 1.35–1.36 | .46 (.18) | .009 | .53 (.15) | < .001 | 1.28–1.29 |
| CANTAB RTI | .35 (.12) | .002 | .15 (.057) | .010 | 1.19 | .67 (.17) | < .001 | .52 (.14) | <.001 | 1.16–1.17 |
| CANTAB SWM | .38 (.13) | .003 | .15 (.063) | .020 | 1.44–1.47 | |||||
| Nagelkerke R2 | .075 | .057 | .061 | .059 | ||||||
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.