Protective effect of smoking against pterygium development in men: a nationwide longitudinal cohort study in South Korea.

ABSTRACT: OBJECTIVE:The present study aimed to evaluate the association between smoking and incident pterygium in adult Korean men. DESIGN:A retrospective nationwide longitudinal cohort. SETTING:National Health Insurance database of South Korea. PARTICIPANTS:This study included Korean men (age range: 40-79 years) registered in the Korea National Health Insurance Service database from 2002 through 2013. We compared HRs for pterygium between 90 547 current/past and 90 547 never-smokers via 1:1 propensity-matched analysis. PRIMARY OUTCOME MEASURE:Incident cases of pterygium were identified from the database. RESULTS:Pterygium developed in 5389 (6.0%) never-smokers and 3898 (4.3%) past/current smokers (P<0.001). The incidence of pterygium per 1000 person-years in never-smokers and in past/current smoker

SUBMITTER: Rim TH 

PROVIDER: S-EPMC5719276 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature