Table 5

 Relationship between mean forced expiratory volume in 1 second (FEV1) of 1127 Gulf War veterans and SMOIL and dust storm exposure and completion of deployment before the air war

MeanSDAdjusted difference between means†95% CI
*Dose response is the expected change in FEV1 per category increase in SMOIL exposure.
†Differences between means adjusted for age, height, weight, atopic status, smoking, service type, rank, education, and marital status.
    Any4.050.64–0.05–0.11 to 0.01
        Low4.060.66–0.05–0.11 to 0.02
        High4.040.60–0.03–0.15 to 0.08
    Dose response*–0.03–0.08 to 0.02
Dust storms
    Yes4.060.65–0.03–0.09 to 0.03
Deployment completed before air war
    No4.070.63–0.06–0.13 to 0.01