Mongolia glaucoma screening trial

Randomised controlled trial of screening for primary angle closure in Mongolia

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN20194450

Enrollment

5000

Registered

2007-03-28

Start date

1999-03-01

Completion date

Unknown

Last updated

2016-10-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Primary Angle Closure Glaucoma Eye Diseases Glaucoma

Interventions

Sample size: Incident PACG was calculated (based on the method described by Leske et. al.). The study was designed with 85% power to detect a 70% reduction in the estimated five-year incidence of 1.4%

therefore there were only shared names between siblings in the family and no others. A photograph was also taken of all participants and attached to the study forms. Masking: All participants were fi

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Aged 50 years or over 2. Living in three selected districts of Ulaan Baatar (Sukbaatar, Bayanzurkh and Chingltei) and Bayanhongor at time of recruitment

Exclusion criteria

Exclusion criteria: 1. Participants diagnosed with glaucoma 2. Those who were not permanent residents in the selected areas

Design outcomes

Primary

Measure	Time frame
Five year incidence of primary angle closure glaucoma (at design stage). Due to a delay in starting field work for follow up study, the final primary outcome was six year incidence of primary angle closure glaucoma.	—

Secondary

Measure	Time frame
Mortality	—

Countries

Mongolia

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026