Volume 4, Number 2—June 1998
Synopsis
Hospitalizations for Unexplained Illnesses among U.S. Veterans of the Persian Gulf War
Table 4
Frequencies and risk ratios under the Cox proportional hazards model for all hospitalizations with at least one unexplained illness, selected demographic variables, 1 August 1991 to 1 April 1996
Variable | Deployed | Nondeployed | Risk ratioa | 95% Confidence interval | |
---|---|---|---|---|---|
Not deployed | - | 1,479,751 | |||
Deployed | 552,111 | - | 1.06 | 1.03 - 1.09 | |
Not hospitalized before warb,c | 513,486 | 1,375,169 | |||
Hospitalized before war | 38,625 | 104,582 | 1.71 | 1.65 - 1.78 | |
Malec | 518,421 | 1,291,478 | |||
Female | 33,690 | 188,273 | 2.11 | 2.04 - 2.18 | |
White | 383,704 | 1,110,949 | |||
Black | 130,249 | 286,427 | 1.04 | 1.01 - 1.08 | |
Other race/ethnicityc | 38,158 | 82,375 | 0.91 | 0.86 - 0.96 | |
All other occupationsc | 523,713 | 1,372,160 | |||
Health-care worker | 28,398 | 107,591 | 1.44 | 1.38 - 1.50 | |
Enlisted | 489,034 | 1,238,790 | |||
Officerc | 63,077 | 240,961 | 0.66 | 0.62 - 0.70 | |
Salary/month: | < $1,000 | 122,161 | 328,187 | ||
$1,000-$1,399 | 269,500 | 573,995 | 0.77 | 0.74 - 0.79 | |
> $1,400c | 160,450 | 577,569 | 0.82 | 0.78 - 0.87 | |
Army | 258,858 | 459,644 | |||
Other branches | 293,253 | 1,202,107 | 0.60 | 0.58 - 0.62 |
aRisk ratios are relative to the first category for each variable.
bIn the 12 months preceding 1 August 1990.
cIncludes unknown.