Liwan Eye Study: the Fourth Follow-up

NCT ID: NCT06333470

Last Updated: 2024-03-28

Basic Information

• Recruitment Status: NOT_YET_RECRUITING
• Total Enrollment: 600 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2024-03-30
• Study Completion Date: 2024-09-30

Brief Summary

Primary angle-closure glaucoma (PACG) is one of the major causes of blindness affecting more than 20 million patients worldwide. The goals of this observational cohort study are to investigate the 20-year incidence of PACG in Chinese population aged 50 years and to develop prediction models for the long-term risk of progression from primary angle-closure suspect (PACS) to PACG.

Detailed Description

Primary angle-closure glaucoma (PACG) is potentially a devastating disease, responsible for half of glaucoma-related blindness worldwide, especially in East Asia. Primary angle-closure suspect (PACS), which is characterized by appositional angle closure, is the earliest stage of primary angle closure diseases and can finally progress to PACG. Thus, identifying PACS eyes at risk of angle closure is crucial for its management. However, the natural history of progression from PACS to PACG and its prediction models are still limited in long-term longitudinal studies. Meanwhile, visual impairment poses a significant global public health burden along with the accelerating trend of aging, it is imperative to further evaluate the visual impairment among the elderly population.

The Liwan Eye Study was a population-based study initiated in 2003. The decision to select Liwan District for the survey was taken because of its stable, older population and a socioeconomic profile representative of Guangzhou as a whole. At baseline, 1405 eligible subjects aged 50 years and older completed a comprehensive eye examination and a questionnaire interview regarding education, income, hypertension and diabetes mellitus. To improve the monitoring of PACS and prevent vision loss associated with PACG, the purposes of this observational cohort study are to investigate the 20-year incidence of PACG in Chinese population aged over 50 years, develop prediction models that include eye characteristics, demographic features, ocular imaging characteristics, and genetic factors for the long-term risk of progression from PACS to PACG. Moreover, we aim to investigate the 20-year change in visual impairment and associated factors.

Conditions

Primary Angle-Closure Glaucoma

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: CROSS_SECTIONAL

Interventions

Primary angle closure diseases

Primary angle-closure suspect (PACS), which is characterized by appositional angle closure, is the earliest stage of primary angle closure diseases and can finally progress to primary angle-closure glaucoma (PACG).

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Participants who have previously participated in the Liwan Eye Study
• Individuals who sign an informed consent form voluntarily

Exclusion Criteria

• None

• Minimum Eligible Age: 70 Years
• Maximum Eligible Age: 100 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Zhongshan Ophthalmic Center, Sun Yat-sen University

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Wei Wang, PhD

Role: PRINCIPAL_INVESTIGATOR

Zhongshan Ophthalmic Center, Sun Yat-sen University

Central Contacts

Wei Wang, PhD

Role: CONTACT

wangwei@gzzoc.com

(0)20 87334687

Other Identifiers

2024KYPJ025

Identifier Type: -

Identifier Source: org_study_id