Table 1

Number of individuals1-151 (% cases) in each category and multivariate odds ratios (95% confidence intervals) using logistic regression for fatigue and CDC syndrome in Gulf male veterans

Explanatory variableFatigueCDC syndrome
Number of individuals
(% cases)		Adjusted1-150
odds ratio		Number of individuals (% cases)Adjusted1-150
odds ratio
Age group (y)
<20292  (51.4)1302  (17.6)1
20–291883 (46.6)1.0  (0.7, 1.3)1924 (16.4)1.2  (0.8, 1.7)
30–39809 (47.0)1.0 (0.7, 1.4)833 (18.1)1.4 (0.8, 2.2)
⩾40179 (43.0)1.1 (0.6, 2.1)191 (18.3)2.8 (1.3, 5.9)
Education
< O levels/GCSEs598 (56.9)1621 (22.4)1
O levels/GCSEs1863 (46.4)0.7 (0.6, 0.9)1911 (16.6)0.8 (0.6, 1.0)
A levels and >603 (35.5)0.8 (0.8, 1.4)617 (10.7)0.8 (0.5, 1.3)
Marital status
Married2397 (45.6)12454 (16.0)1
Single476 (46.9)1.1 (0.8, 1.4)493 (17.2)1.1 (0.8, 1.5)
Ex married274 (56.9)1.2 (0.9, 1.7)286 (25.2)1.8 (1.2, 2.5)
Alcohol intake
None243 (54.3)1253 (25.7)1
<21 units2485 (46.8)0.7 (0.5, 1.0)2541 (16.3)0.6 (0.4, 0.9)
>21 units420 (43.6)0.6 (0.4, 0.9)439 (16.4)0.6 (0.6, 1.0)
Smoking
Current1161 (55.6)11192 (23.9)1
Ex smoker762 (44.5)0.8 (0.7, 1.0)783 (15.7)0.8 (0.6, 1.0)
Non-smoker1221 (40.0)0.7 (0.6, 0.8)1255 (11.6)0.6 (0.4, 0.7)
Service
Army2397 (50.2)12470 (19.4)1
Royal Navy271 (38.9)0.9 (0.2, 3.1)276 (9.8) 1-152
Royal Air Force447 (36.2)2.1 (0.6, 7.3)453 (10.6)1.2 (0.3, 5.9)
Regular status
Regular2966 (47.4)13044 (17.3)1
Reservist48 (45.8)1.0 (0.4, 2.2)49 (20.4)0.7 (0.2, 2.3)
Rank
Private1180 (50.8)11215 (19.7)1
Non-commissioned officer1577 (48.7)0.9 (0.7, 1.1)1617 (17.8)0.8 (0.6, 1.0)
Officer328 (29.0)0.5 (0.3, 0.8)337 (6.5)0.3 (0.1, 0.6)
Combat arm
Combat Services Support991 (50.6)11017 (20.4)1
Combat Support1066 (49.3)0.9 (0.8, 1.1)1094 (18.3)1.0 (0.8, 1.2)
Combat144 (60.4)1.5 (1.0, 2.2)150 (22.7)1.2 (0.8, 1.9)

  • ↵1-150 Adjusted for all other variables in table.

  • ↵1-151 Denominators for each outcome differ slightly because of missing values on some items.

  • ↵1-152 Empty cell.