Table 1 General characteristics of the study subjects
From: Impact of meteorological variation on hospital visits of patients with tree pollen allergy
| Â | Total | Patients with tree pollen allergy | Patients without tree pollen allergy |
|---|---|---|---|
N | 4,715 | 965 | 3,750 |
Age (years) | Â | Â | Â |
   Mean | 38.4 | 35.4 | 39.1 |
   SD | 13.4 | 11.7 | 13.7 |
Sex, men | Â | Â | Â |
   n | 2,206 | 520 | 1,686 |
   % | 46.8 | 53.9 | 45.0 |