Table 3
Predictive value (PV) and selected questions from the questionnaire for assessment of malignant melanoma risk when the cohorts of pilots and cabin attendants were compared to a random sample of the population, according to Axelson and Steenland18
| Selected risk ratio | PV for pilots | PV for cabin attendants | ||
|---|---|---|---|---|
| 2. | Red hair colour | 1.5 | ||
| Other hair colour | 1 | |||
| 1.00 | 0.99 | |||
| 4. | Number of naevi | |||
| 0–20 | 1 | |||
| 21–100 | 1.5 | |||
| More than 100 | 2.5 | |||
| 1.08 | 1.06 | |||
| 5. | Skin reactions when sunbathing | |||
| Always burn, never tan | 5 | |||
| Always burn, occasionally tan | 3 | |||
| Occasionally burn, always tan | 2 | |||
| Never burn, always tan | 1 | |||
| 1.06 | 0.97 | |||
| 6. | History of severe sunburn after the age of 19 | |||
| Never | 1 | |||
| 1–5 times | 1.5 | |||
| More than 5 times | 2.5 | |||
| 1.08 | 1.05 | |||
| 7. | History of severe sunburn before the age of 19 | |||
| Never | 1 | |||
| 1–5 times | 1.5 | |||
| More than 5 times | 2.5 | |||
| 1.03 | 1.01 | |||
| 8. | Use of sun beds/sunlamps | |||
| Never | 1 | |||
| 1–10 times | 2 | |||
| 10–100 times | 3 | |||
| 0.85 | 1.03 | |||
| 9. | Use of sunscreen | |||
| Never | 3 | |||
| Sometimes | 2 | |||
| Always | 1 | |||
| 0.88 | 0.85 | |||
| 10. | Sunny vacation | |||
| Never | 1 | |||
| 1–10 times | 2 | |||
| 11–20 times | 3 | |||
| More than 20 times | 5 | |||
| 1.36 | 1.34 | |||
