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Table 3 The association between deployment to the Gulf War and joint pain amongst veterans

From: Pain in veterans of the Gulf War of 1991: a systematic review

Study Period of prevalence estimate Prevalence GWV Prevalence NGV OR (95% CI) % weight in meta-analysis
Sostek 1996 Current symptoms 74% 30% 6.68 (2.78–16.1) 3.5
Doebbeling 2000 Symptoms past 12 months 37% 16% 3.08 (2.64–3.61) 11.2
Fukuda 1998 Current symptoms
Symptoms for 6 months
36%
18%
13%
6%
3.77 (3.19–4.45) 11.1
Proctor 1998 Symptoms past month FD 33%
NO 32%
16% 2.41 (1.08–5.39) 4.0
Ishoy 1999 No numerical data     
Unwin 1999 Symptoms past month 32.2% Bosnia 13.8%
Era 14.4%
2.82 (2.46–3.23) 11.4
Unwin 2002 Symptoms past month 27.8% Bosnia 12.7%
Era 10.8%
3.16 (1.85–5.40) 6.4
Kang 2000 Time period unclear 45% 27% 2.21 (2.09–2.34) 11.9
Knoke 2000 Current symptoms 14.1% 4.7% 3.33 (2.25–4.92) 8.2
Steele 2000 Symptoms past 12 months 37% 15% 3.35 (2.50–4.49) 9.5
Gray 2002 Symptoms past 12 months 37.9% DEV 16.8%
NDV 13.6%
3.02 (2.74–3.33) 11.6
Kelsall 2004 Symptoms past month 35% 29% 1.30 (1.12–1.52) 11.2
Summary OR (95% CI) 2.81 (2.31–3.42)
Heterogeneity χ 2 = 144.7, df = 10, P < 0.001
  1. GWV – Gulf War veterans; NGV – non-Gulf veterans.
  2. OR – odds ratio. Individual study ORs based on published prevalence data and not adjusted for confounders.
  3. Summary OR – weighted average of all individual study ORs, derived from "metan" command in Stata version 9.0 using a random effect model and DerSimonian and Laird method.
  4. Fukuda 1998: data on current symptoms used in meta-analysis.
  5. Proctor 1998: FD – Fort Devens sample, NO – New Orleans sample; combined prevalence in FD and NO vs NGV compared in meta-analysis
  6. Unwin 1999/2002: GWV vs Era controls compared in meta-analysis.
  7. Gray 2002: DEV – deployed elsewhere veterans, NDV – non-deployed veterans; GWV vs DEV compared in meta-analysis.