All means, proportions, and standard erros are weighted estimates of the U.S. population characteristics, taking into account NHIS’s complex sampling design. All P values are unadjusted. P values were
COM, chronic otitis media; SE, standard error; KNHANES, Korean national health and nutrition examination survey; *weighted for the multistage sampling design of KNHANES 2010~2012 Prevalence of chronic
1Chi Square test; tested difference between categories in each socio-economic variable p<0.05 indicate significance. Frequency and percentage of respondents reporting any problem on the 5 dimensions b
