Prevalence and risk factors for pterygium: a cross-sectional study in Han and Manchu ethnic populations in Hebei, China.

ABSTRACT:

Aims

To investigate the prevalence, ethnic differences and associated risk factors for pterygium in Han and Manchu populations aged 40-79 years in Hebei province, China.

Design

Cross-sectional study, as a part of the China National Health Survey.

Setting

Hebei province, China.

Participants

A multistage cluster sampling method with urbanisation level-based stratification was used to select participants for this study. A total of 4591 individuals over 40 years were recruited for this study. Inclusive criteria: (1) residents who had been living in Hebei for more than 1 year; (2) Han individuals with both parents being Han, or Manchu individuals with both parents being Manchu; (3) underwent ophthalmic examinations and (4) information in the questionnaire was comple

SUBMITTER: Pan Z 

PROVIDER: S-EPMC6398733 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature