Prevalence and Determinants of Influenza Vaccination in Koreans

국내 독감백신 투여현황과 투여 결정에 영향을 주는 요인에 관한 연구

This study was aimed to determine influenza vaccination coverage in 2004 in Koreans and investigate the factors associated with vaccination. Documentation of vaccination status and baseline data was conducted by a survey using questionnaire sheets. Baseline data and vaccination status were documented on 1465 people out of whom 60.1% received the influenza vaccine. Forty-seven percent of the responders were male; 4% were aged 1-12, 32% were aged 13-39, 32% were aged 40-64 and 32% were aged 65 or older. Twenty-three percent reported a chronic illness, increasing their risk for complications from influenza. Predictors of influenza vaccination were: older age (OR=11.7, 95% CI 5.1-26.8), the presence of chronic illness (OR=2.3, 95% CI 1.1-4.7), previous vaccination (OR=1.8, 95% CI 1.1-2.8), belief that influenza vaccine is effective in preventing influenza (OR=2.5, 95% CI 1.1-5.7) and education level (OR=1.7, 95% CI 1.0-2.7). Immunization rates were much higher in those who will take immunization again (OR=10.4, 95% CI 5.5-19.6). Factors affecting the decision on immunization were self-determination (43.6%), public relations (24.1%), recommendation from family members or friends (22.4%) and consulting with health professionals (5.8%). The main reason not to take influenza vaccine was the thought that they are healthy (50.1%). Overall, influenza vaccine coverage was high in those aged 65 or older. Immunization against influenza was influenced more by existing medical problem and belief about the vaccine's effectiveness, rather than sex or residence.