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Heterogeneity of the risk factor sunburns in risk prediction models for melanoma regarding three aspects: definition of sunburn, time period of sunburn occurrence and measurement level (n = 13 models).
| Category | n | % |
|---|---|---|
| Definition of sunburn | ||
| Blistering | 4 | 30.8 |
| Pain and erythema or blisters for >24 h | 1 | 7.7 |
| Painful | 1 | 7.7 |
| Peeling of skin | 1 | 7.7 |
| No explanation given | 6 | 46.2 |
| Time period | ||
| Childhood | 5 | 38.5 |
| Lifetime | 5 | 38.5 |
| Not reported | 3 | 23.1 |
| Measurement level | ||
| Dichotomous | 8 | 61.5 |
| Categorial | 5 | 38.5 |
