Table 1. Pneumonia patients with no serious underlying conditions treated with antimicrobial drugs.

Characteristic	No. of patients (%) (N = 4,538)
Age (y)   18–44   45–64   >65	1,581 (35) 1,610 (35) 1,347 (30)
Sex   Male   Female	2,103 (46) 2,435 (54)
Study year   2000   2001   2002	1,827 (40) 1,328 (30) 1,383 (30)