Table 4.
Models predicting phase 2 mental function
| |
Model 1 R2=.06 |
Model 2 R2=.23 |
Model 3 R2=.40 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| b | SEMb | β | t | b | SEMb | β | t | b | SEMb | β | t | |
| Age |
.24 |
.06 |
.19 |
4.19** |
.17 |
.05 |
.13 |
3.06* |
.17 |
.05 |
.13 |
3.58** |
| Body Mass Index |
15 |
.10 |
.07 |
1.40 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
| Mental Health Function (Phase 1) |
|
14. |
.07 |
.12 |
2.12* |
.14 |
.05 |
.12 |
3.02** |
|||
| Social Desirability |
|
.32 |
.14 |
.11 |
2.36* |
.32 |
.12 |
.11 |
2.65** |
|||
| Negative Emotionality |
|
.08 |
.03 |
.11 |
2.97** |
.08 |
.03 |
.13 |
2.76** |
|||
| Social Support |
|
|
-.38 |
.10 |
-.17 |
-63** |
||||||
| Physical Symptoms (Phase 2) |
|
|
-.33 |
.04 |
-.35 |
-8.12** |
||||||
| Post-Traumatic Stress Disorder Symptoms (Phase 2) | ||||||||||||
** p < .001, * p < .05. Each successive step accounted for a significant increase in variance over the prior model (all ps < .05 or better). Overall final model adjusted R2 = 0.40. For the model predicting mental health function at Phase 2 we included the following Phase 1 variables: gender, age, BMI, mental health function at Phase 1, social desirability, negative emotionality, absorption, social support, approach coping, avoidance coping, pre-deployment life events, alcohol misuse, physical symptoms, diastolic blood pressure at Phase 1 and smoking. We also included the following Phase 2 variables: deployment experiences, combat experiences, physical symptoms and PTSD symptoms. Non-significant predictors were eliminated using a backward elimination method. Higher scores indicate better mental function.