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Table 1 General characteristics of the study subjects

From: Impact of meteorological variation on hospital visits of patients with tree pollen allergy

  Total Patients with tree pollen allergy Patients without tree pollen allergy
N 4,715 965 3,750
Age (years)    
   Mean 38.4 35.4 39.1
   SD 13.4 11.7 13.7
Sex, men    
   n 2,206 520 1,686
   % 46.8 53.9 45.0