NCT04340635

Brief Summary

This study is a multi-center study, which collects data from multiple regions to obtain the general biological characteristics of the Chinese population. The formula for calculating the artificial lens power based on foreign populations is effectively modified based on the Chinese population.

Trial Health

43
At Risk

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Trial has exceeded expected completion date
Enrollment
20,000

participants targeted

Target at P75+ for all trials

Timeline
Completed

Started Jan 2018

Typical duration for all trials

Geographic Reach
1 country

1 active site

Status
unknown

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

January 1, 2018

Completed
2.2 years until next milestone

First Submitted

Initial submission to the registry

March 29, 2020

Completed
11 days until next milestone

First Posted

Study publicly available on registry

April 9, 2020

Completed
6 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

October 1, 2020

Completed
3 months until next milestone

Study Completion

Last participant's last visit for all outcomes

December 31, 2020

Completed
Last Updated

April 9, 2020

Status Verified

April 1, 2020

Enrollment Period

2.8 years

First QC Date

March 29, 2020

Last Update Submit

April 7, 2020

Conditions

Cataract

Keywords

Corneal astigmatismaxial length (AL), anterior chamber depth (ACD)partial coherence interferometry

Outcome Measures

Primary Outcomes (4)

  • axial length (AL)

    Measured using the partial coherence laser interferometry (IOLMaster, Carl Zeiss Meditec, Germany)

    1 hour

  • anterior chamber depth (ACD)

    Measured using the partial coherence laser interferometry (IOLMaster, Carl Zeiss Meditec, Germany)

    1 hour

  • keratometric power (K)

    Measured using the partial coherence laser interferometry (IOLMaster, Carl Zeiss Meditec, Germany)

    1 hour

  • corneal astigmatism (CA)

    Measured using the partial coherence laser interferometry (IOLMaster, Carl Zeiss Meditec, Germany)

    1 hour

Study Arms (1)

Multi-center data collection

Without intervention

Eligibility Criteria

Age50 Years+
Sexall
Age GroupsAdult (18-64), Older Adult (65+)
Sampling MethodNon-Probability Sample
Study Population

Select elderly cataract patients from different regions of China (at least one representative city in each of east, south, west, north, and central China) who were treated in Aier Eye Hospital.

You may qualify if:

  • patients aged over 50 years

You may not qualify if:

  • history of refractive surgery,
  • corneal diseases
  • ocular inflammation
  • trauma

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Shanghai Aier Eye Hospital

Shanghai, Shanghai Municipality, 200000, China

RECRUITING

Related Publications (1)

  • Qian Z, Xie X, Yang J, Ye H, Wang Z, Chen J, Liu H, Liang J, Jiang L, Zheng C, Chen X. Detection of shallow anterior chamber depth from two-dimensional anterior segment photographs using deep learning. BMC Ophthalmol. 2021 Sep 22;21(1):341. doi: 10.1186/s12886-021-02104-0.

    PMID: 34551738DERIVED

MeSH Terms

Conditions

CataractAstigmatism

Condition Hierarchy (Ancestors)

Lens DiseasesEye DiseasesRefractive Errors

Central Study Contacts

xu chen

CONTACT

13601762646Francois.chenxu@gmail.com

hui liu

CONTACT

185706388431009254042@qq.com

Study Design

Study Type
observational
Observational Model
CASE ONLY
Time Perspective
OTHER
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

March 29, 2020

First Posted

April 9, 2020

Study Start

January 1, 2018

Primary Completion

October 1, 2020

Study Completion

December 31, 2020

Last Updated

April 9, 2020

Record last verified: 2020-04

Locations

CN(1)