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Table 3 Models predicting phase 2 physical function

From: What pre-deployment and early post-deployment factors predict health function after combat deployment?: a prospective longitudinal study of Operation Enduring Freedom (OEF)/Operation Iraqi Freedom (OIF) soldiers

  Model 1 R 2=.05 Model 2 R 2=.18 Model 3 R 2=.26
  b SEMb β t b SEMb β t b SEMb β t
Age -.16 .04 -.17 -.3.63** -.15 .04 -.16 -3.51** -.15 .04 -.16 -3.81**
Body Mass Index -.13 .09 -.09 1.52** -.04 .08 -.03 -.50 -.03 .08 -.02 -.41
Gender −2.43 1.19 -.10 -2.04* -- -- -- -- -- -- -- --
Physical Function (Phase 1)   .37 .07 -.25 5.17** .35 .07 .24 5.34**
Approach Coping   -.27 .13 -.10 -2.07* -- -- -- --
Physical Symptoms (Phase 1)   -.28 .09 -.14 -3.13** -- -- -- --
Smoking   .61 .78 .04 .79 .35 .66 .02 .52
Systolic Blood Pressure reactivity after a stressor   .14 .05 .15 3.13** .11 .04 .12 2.58*
Physical Symptoms (Phase 2)    .38 .06 -.24 -5.79**
Injury    -2.46 .98 -.16 -2.50*
  1. ** 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 = 0.26. For the model predicting physical health function at Phase 2 we included the following Phase 1 variables: gender, age, body mass index (BMI), number of previous deployments, physical health function at Phase 1, pre-deployment life events, approach coping, avoidance coping, physical symptoms, systolic blood pressure, systolic blood pressure reactivity to a stressor, and smoking. We also included the following Phase 2 variables: PTSD symptoms, physical symptoms and injury. Non-significant predictors were eliminated using a backward elimination method. Higher scores indicate better physical function.