Hypothetical data from a prevalence study of self reported dermatitis in printing workers
| True prevalence | Reported prevalence | ||||||
|---|---|---|---|---|---|---|---|
| Exposed | Non-exposed | Exposed | Non-exposed | ||||
| Dermatitis | 30 | 15 | 24+7 = 31 | 12+8.5 = 20.5 | |||
| Non-dermatitis | 70 | 85 | 63+6 = 69 | 76.5+3 = 79.5 | |||
| Total | 100 | 100 | |||||
| Prevalence ratio | 2.0 | 1.5 | |||||
| Prevalence odds ratio | 2.4 | 1.7 | |||||