Relationship between physician characteristics and their injection use in Korea.

Objective: To determine the relationships among physicians' knowledge and beliefs, perceived patient demand and treatment with injection drugs in Korean primary care settings.

Design: A cross-sectional, nationwide survey.

Setting: A total of 644 clinics were selected from the 9660 clinics with more than 1000 patient visits from April 1 to June 30, 2004, among four specialties (general practice, internal medicine, otorhinolaryngology, family medicine) that dealt mainly with acute upper respiratory infections in primary care settings.