Methods: To investigate the prevalence of atopic eczema (L20), we did analyze the nationwide database (National Health Insurance Corporation) which included the health-care records of 48.1 million individuals between January 1, 2003, and December 31, 2014.
Results: Prevalence of atopic eczema in Korea showing a decreased tendency; 2.42% (2003), 2.44% (2004), 2.40% (2005), 2.26% (2006), 2.27% (2007), 2.26% (2008), 2.15% (2009), 2.14% (2010), 2.05% (2011), 1.97% (2012), 1.96% (2013), and 1.89% (2014). Also, child groups decreased between 2003 and 2014 ; under 6 years old age group had decreased 14.20% to 10.74%, 7~12 years group 5.24% to 4.73%. However, adolescent and adult age groups were increased between 2003 and 2014: 13~19 years group 1.82% to 2.79%. 20~29 years group 1.25% to 1.58%, 30~39 years group 0.68% to 0.89%, 41~49 years group 0.48% to 0.63%, 50~59 years group 0.53% to 0.62%, 60~69 years group 0.60% to 0.76%, and over 70 years group 0.66% to 0.96%.
Conclusion: Prevalence of atopic eczema in Korea showing decreased tendency, however increased in adult age groups. Interestingly, under 6 years old age group had been showing abruptly decreased pattern after 2009 endemic influenza infecion. So, further study was needed.