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 |