Table 1

 Prevalence and odds ratios (ORs) of respiratory symptoms in the previous 12 months

Respiratory symptomsGulf War veterans n (%)Comparison group n (%)Adjusted OR*95% CI
*Odds ratios are adjusted for age, height, smoking, weight, atopy, education, marital status, service, and rank.
Wheeze only345 (24.9)259 (18.8)1.41.2 to 1.7
Wheeze when no cold228 (16.6)152 (11.1)1.61.3 to 2.0
Wheeze with breathlessness171 (12.4)99 (7.2)1.81.3 to 2.3
Nocturnal chest tightness191 (13.9)137 (10.0)1.41.1 to 1.9
Nocturnal cough337 (24.3)250 (18.1)1.41.1 to 1.7
Morning cough144 (10.4)121 (8.8)1.20.9 to 1.5
Day or night time cough206 (14.9)157 (11.4)1.31.0 to 1.6
Morning sputum211 (15.3)172 (12.5)1.21.0 to 1.5
Spontaneous dyspnoea106 (7.7)66 (4.8)1.61.1 to 2.2
Post-exertional dyspnoea297 (21.6)231 (16.8)1.31.1 to 1.6
Nocturnal dyspnoea78 (5.6)51 (3.7)1.51.0 to 2.2