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Table 4 Risk factors for no-symptoms, and five leading five symptoms in a univariate model

From: The prevalence of medical symptoms in military aircrew

Symptom Aircraft type Age Type of service Weekly flying hours
Jet fighter Helicopter Transport Per year Reserve Career Low Medium High
No symptom
 Odds ratio 1.23 1.04 1 1.01 1 0.73 1 0.60 1.16
 95% CI 0.69–2.19 0.54–2.01   0.99–1.03   0.46–1.17   0.33–1.07 0.66–2.02
 P 0.48 0.9 0.287 0.195 0.083 0.607
Spinal pain
 Odds ratio 1.05 1.05 1 1.01 1 0.73 1 0.96 1.04
 95% CI 0.55–1.99 0.51–2.18   0.99–1.04   0.44–1.24   0.51–1.79 0.56–1.95
 P 0.893 0.892 0.255 0.247 0.894 0.893
Respiratory
 Odds ratio 0.91 0.74 1 0.98 1 1.67 1 1.80 1.14
 95% CI 0.47–1.74 0.35–1.59   0.96–1.01   0.96–2.93   0.96–3.36 0.58–2.26
 P 0.768 0.441 0.214 0.071 0.065 0.707
Fatigue
 Odds ratio 1.30 1.10 1 0.93 1 4.31 1 1.15 0.72
 95% CI 0.65–2.59 0.50–2.43   0.90–0.96   2.18–8.51   0.61–2.16 0.36–1.47
 P 0.462 0.809 <0.001 <0.001 0.670 0.368
Headache
 Odds ratio 0.88 1.39 1 0.98 1 1.07 1 1.53 0.69
 95% CI 0.36–2.19 0.54–3.62   0.94–1.01   0.52–2.18   0.70–3.33 0.26–1.82
 P 0.788 0.497 0.173 0.855 0.285 0.448
Weakness
 Odds ratio 0.62 0.88 1 0.89 1 16.93 1 1.71 1.28
 95% CI 0.21–1.85 0.27–2.86   0.83–0.95   2.24–128.23   0.60–4.91 0.40–4.04
 P 0.387 0.834 0.001 0.006 0.315 0.678