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Table 2 Hierarchical multiple regression model increases in coefficient of determination results for age and BMI (Model 1), with GWI Health Status (Model 2), and with DTS Total Score (Model 3)

From: Post-traumatic stress impact on health outcomes in Gulf War Illness

Measure

Model 1

Model 2

Model 3

Δ R2

Δ R2

Δ R2

Physical functioning

0.112*

0.250**

0.167**

Physical rolea

0.071

0.435**

0.085**

General health perceptions

0.095**

0.436**

0.091**

Energy/fatigue (Vitality)

0.122**

0.418**

0.154**

Social functioning

0.125**

0.327**

0.218**

Emotional roleb

0.059

0.359**

0.248**

Emotional well-being

0.073*

0.425**

0.181**

Pain

0.111**

0.338**

0.164**

Physical fatigue

0.106**

0.418**

0.066**

Mental fatigue

0.081*

0.439**

0.055**

Reduced activity

0.155**

0.354**

0.316**

Reduced motivation

0.062*

0.343**

0.131**

General fatigue

0.111**

0.448**

0.131**

  1. *p < 0.05; **p < 0.01
  2. aPhysical Role (Role Limitations due to Physical Health)
  3. bEmotional Role (Role Limitations due to Emotional Problems)