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Table 2 Hierarchical multiple regression model changes in the coefficient of determination for GWI health status (Model 1), and with DTS total score (Model 2)

From: The impact of post-traumatic stress on quality of life and fatigue in women with Gulf War Illness

Measure

Model 1

Model 2

ΔR2

ΔR2

RAND SF-36

 Physical functioning

0.672****

0.024

 Physical rolea

0.630****

0.017

 General health perceptions

0.670****

0.038

 Energy/fatigue (vitality)

0.652****

0.047

 Social functioning

0.601****

0.053

 Emotional roleb

0.632****

0.091**

 Emotional well-being

0.458****

0.140***

 Pain

0.433****

0.080*

MFI

  

 Physical fatigue

0.536****

0.059

 Mental fatigue

0.569****

0.011

 Reduced activity

0.408****

0.097**

 Reduced motivation

0.416****

0.005

 General fatigue

0.415****

0.094**

  1. *p < 0 .1, **p < 0.05, ***p < 0.01, ****p < 0.001
  2. aPhysical role (role limitations due to physical health)
  3. bEmotional role (role limitations due to emotional problems)