TABLE 4-6 Nervous System Diseases
|
Study |
Design |
Population |
Outcomes |
Results |
Adjustments |
Comments |
|
Peripheral Neuropathy and Myopathy |
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|
Davis et al., 2004 (Vol. 4) |
Cross-sectional, prevalence, medical evaluation, exposure-specific component |
1047 deployed veterans vs 1121 nondeployed veterans; 240 Khamisiyah-exposed deployed veterans vs 807 non-Khamisiyah-exposed deployed veterans |
Distal symmetric polyneuropathy identified by nerve-conduction studya |
Deployed vs nondeployed veterans: OR 0.65 (95% CI 0.33-1.28); Khamisiyah-exposed veterans vs non-Khamisiyah-exposed veterans: OR 1.04 (95% CI 0.25-4.37) |
Excludes coexisting conditionsb |
Low participation rate: 53% in deployed veterans, 39% in nondeployed veterans |
|
Rose et al., 2004; Sharief et al., 2002 (Vol. 4) |
Case-control |
49 symptomatic deployed UK veterans vs 26 healthy deployed UK veterans, 13 symptomatic Bosnia deployed veterans, 22 symptomatic Gulf War-era veterans |
Nerve-conduction studies, quantitative sensory and autonomic testing, concentric needle and single-fiber, electromyography, ischemic forearm exercise test, subanaerobic bicycle exercise test, muscle biopsy |
No significant differences between symptomatic deployed and nondeployed veterans, except deployed veterans had increased lactate production in bicycle exercise test |
|
Positive finding from bicycle test could reflect mitochondrial damage or inactivity resulting from ill health |
|
Kelsall et al., 2005 (Update) |
Cross-sectional survey |
1382 Australian male GWVs, 1376 nondeployed male era veterans frequency matched by age and service type (Same study population as Kelsall et al., 2004a,b) |
Self-reported neurologic symptoms corroborated during neurological examination; SF-12; modified NIS |
Lower limb neurological type symptoms and signs: OR 1.6 (95% CI 1.0-2.7) Neuropathy Score: GWV (2.0, sd = 4.3) vs controls (2.0, sd = 4.7) RoM 1.1 (95% CI 0.9-1.3) Association of neurological symptoms in self-reported nonexposed compared to exposed: PB (RoM 1.5, 95% CI 1.2-1.8) Antibiological warfare |
Age, rank, service type, current marital status, highest level of education, alcohol consumption, and history of diabetes |
Exposure data self-reported; response rate 80.5% for deployed, 56.8% for nondeployed |