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Ten-year incidence and prevalence of clinically diagnosed blepharitis in South Korea: a nationwide population-based cohort study

 Tyler Hyungtaek Rim  ;  Min Jae Kang  ;  Moonjung Choi  ;  Kyoung Yul Seo  ;  Sung Soo Kim 
 Clinical and Experimental Ophthalmology, Vol.45(5) : 448-454, 2017 
Journal Title
 Clinical and Experimental Ophthalmology 
Issue Date
Adolescent ; Adult ; Age Distribution ; Aged ; Aged, 80 and over ; Blepharitis/diagnosis ; Blepharitis/epidemiology* ; Child ; Child, Preschool ; Female ; Follow-Up Studies ; Forecasting* ; Humans ; Incidence ; Infant ; Infant, Newborn ; Male ; Middle Aged ; Population Surveillance/methods* ; Prevalence ; Registries* ; Republic of Korea/epidemiology ; Retrospective Studies ; Risk Factors ; Sex Distribution ; Young Adult
NHIS-NSC 2002-2013 ; blepharitis ; epidemiology ; ocular surface disease ; prevalence
IMPORTANCE: Blepharitis is one of the most common conditions. However, no study has yet evaluated the epidemiology by evaluating a large population-based sample. BACKGROUND: To evaluate the incidence and prevalence of clinically diagnosed blepharitis in South Korea. DESIGN: Nationwide population-based study. PARTICIPANTS: We investigated the Korean National Health Insurance Service-National Sample Cohort, a representative one million-sample of the Korean population, for patients diagnosed with blepharitis according to the Korean Classification of Diseases. METHODS: Annual and overall incidence and prevalence of blepharitis during the study period (2004-2013) were estimated after excluding chronic blepharitis patients, diagnosed during 2002-2003. Sociodemographic factors and comorbidities associated with blepharitis were evaluated using Cox proportional hazard regression. MAIN OUTCOME MEASURES: The first occurrence of blepharitis. RESULTS: A total of 1 116 363 individuals over 9 698 118 person-years were evaluated (mean follow up: 8.7 years) from 2004 to 2013. The overall incidence was 1.1 (95% confidence interval, 1.1-1.1) per 100 person-years. The incidence increased with time (0.9 vs. 1.3 per 100 person-years, in 2004 and 2013, respectively) and was higher in female patients (1.3 vs. 0.9 per 100 person-years, respectively). The overall prevalence was 8.1% (95% confidence interval: 8.0-8.1) among subjects aged 40 years or older. Chalazion, gastritis, Sjögren's syndrome, pterygium, rosacea, prostatic hypertrophy, atopy, irritable bowel disease and peptic ulcer were associated with an increased incidence of blepharitis in the multivariable Cox model. CONCLUSIONS: We found that blepharitis was a relatively common disease and is associated with various ocular and systemic conditions.
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1. College of Medicine (의과대학) > Dept. of Ophthalmology (안과학교실) > 1. Journal Papers
Yonsei Authors
강민재(Kang, M-j)
김성수(Kim, Sung Soo) ORCID logo https://orcid.org/0000-0002-0574-7993
서경률(Seo, Kyuong Yul) ORCID logo https://orcid.org/0000-0002-9855-1980
임형택(Rim, Tyler Hyungtaek)
최문정(Choi, Moonjung)
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