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Characteristics of the populations.
| No Allergy | With Allergies | ||
|---|---|---|---|
| Participants (%) | 7125 (64.4%) | 3942 (35.6%) | |
| Age | |||
| Mean (SD) | 41.5 (14.7) | 39.83 (14.1) | <0.001 |
| Gender | |||
| Female | 3443 (48.3%) | 2142 (54.3%) | <0.001 |
| Male | 3682 (51.7%) | 1800 (45.7%) | |
| Skin phototype * | |||
| I | 857 (12.0%) | 587 (14.9%) | <0.001 |
| II | 1875 (26.3%) | 1116 (28.3%) | |
| III | 2741 (38.5%) | 1331 (33.8%) | |
| IV | 1134 (15.9%) | 635 (16.1%) | |
| V | 270 (3.8%) | 147 (3.7%) | |
| VI | 248 (3.5%) | 126 (3.2%) |
*: skin phototypes according to the Fitzpatrick classification [20].
