Factors influencing on influenza vaccination among chronic obstructive pulmonary disease: The Korea national health and nutrition examination survey

BACKGROUND: This study was to investigate factors associated with vaccination coverage among chronic obstructive pulmonary disease (COPD) in Korea METHODS: Using data acquired from the fourth to sixth Korean National Health and Nutrition Examination Surveys (KNHANES IV, V, VI), 16,812 subjects (normal lung function: 14,097, obstructive spirometric pattern: 2,715) aged ≥40 years who underwent spirometry and “influenza vaccination history” were analyzed. RESULTS: The vaccination rate of middle aged (40∼64 years) COPD patients was only 31.9%, whereas that of elderly (≥65 years) COPD was 80.0%. After regression, older age (Odd ratio [OR], 1.12; 95% confidential interval [95% CI], 1.09-1.14), married status (0.64, 0.42-0.96), house income less than average (0.72, 0.53-0.98), poor self-rated health status (1.45, 1.14-1.95), and regular health check-up (2.61, 1.93-3.51) were associated with higher influenza vaccination rate. CONCLUSIONS: Attention and interventions are required to improve the influenza vaccination coverage for the non-elderly patients with COPD, especially on those who are relatively rich, thinking self as being healthy, taking irregular health check-ups, not having spouse.