Table 5 Factor loadings for final confirmatory 4-factor model for symptoms reported in the US Study of Gulf War veterans (N = 1,163)
From: Dichotomous factor analysis of symptoms reported by UK and US veterans of the 1991 Gulf War
Current health problem | Factor 1 | Factor 2 | Factor 3 | Factor 4 |
|---|---|---|---|---|
Gastrointestinal/ Respiratory | Allergies | Mood-Cognition | Musculoskeletal | |
Nausea or vomiting | .80 | .00 | .00 | .00 |
Diarrhea (3 or more loose bowel movements in 24 hours) | .73 | .06 | -.04 | .02 |
Gas, bloating, cramps or abdominal pain | .71 | -.01 | .06 | .02 |
Skin rashes or sores | .56 | -.10 | -.05 | .20 |
Sore throat | .54 | .36 | -.17 | .14 |
Fever | .53 | .18 | .06 | .17 |
Swollen lymph nodes in your neck, armpit, groin | .52 | .23 | -.14 | .08 |
Night sweats that soak your bed sheets | .52 | -.07 | .10 | .16 |
Wheezing | .52 | . 22 | -.10 | .18 |
Cough | .47 | .36 | -.16 | .13 |
Chest pain | .44 | .16 | .13 | .12 |
Sinus congestion | .00 | .90 | .00 | .00 |
Hay fever or other allergies | -.04 | .60 | .05 | -.09 |
Difficulty remembering or concentrating | .00 | .00 | .87 | .00 |
Depression | -.07 | .17 | .77 | -.08 |
Trouble finding words | . 04 | .05 | .75 | -.11 |
Irritability or moodiness | -.11 | .28 | .74 | .00 |
Anxiety | -.05 | .29 | .73 | -.12 |
Episodes of disorientation | .25 | -.01 | .66 | -.03 |
Fatigue lasting 24 hours after exertion | .15 | .05 | .48 | .28 |
Fatigue | .15 | .13 | .48 | .24 |
Decreased sexual interest | .15 | .00 | .45 | .07 |
Dizziness | .36 | .04 | .40 | .01 |
Joint pain | .00 | .00 | .00 | .96 |
Joint stiffness | .06 | .01 | .08 | .80 |
Muscle pain | .07 | .03 | .15 | .65 |