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Occupational Cataracts and Lens Opacities in Interventional Cardiology : the O'CLOC Study

Study of the Occupational Risk of Radiation-induced Cataracts Among Cardiologists

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT01061463
Enrollment
250
Registered
2010-02-03
Start date
2009-10-31
Completion date
2011-03-31
Last updated
2015-04-06

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

Conditions

Cataracts, Lens Opacities

Keywords

Radiation cataracts, Lens opacities, X-rays, Interventional Cardiologists, Electrophysiologists

Brief summary

The purpose of this study is to test the existence of an increased risk of cataracts among interventional cardiologists as compared to cardiologists not exposed to X-rays.

Detailed description

This cross-sectional study includes cardiologists aged \> 40 years: a group of interventional cardiologists (coronary interventionists and electrophysiologists) and a group of unexposed workers (including cardiologists). Individual information, including risk factors of cataracts (age, diabetes, myopia, etc. ...), are collected during a telephone interview. For the exposed group, a specific section of the questionnaire is focused on the occupational history, the description of the procedures (type, frequency, radiation protection tool) and will be used for the classification into comparable exposure level groups according to estimates of cumulative dose. For all participants, eye examinations are performed to specifically detect cataracts even in the early stages (lens opacities, LOCS III according to the international standard classification).

Interventions

None listed

Sponsors

Sophie JACOB
Lead SponsorOTHER_GOV

Study design

Observational model
CASE_CONTROL
Time perspective
CROSS_SECTIONAL

Eligibility

Sex/Gender
ALL
Age
40 Years to 75 Years
Healthy volunteers
Yes

Inclusion criteria

* aged at least 40 yrs old * for interventional cardiologists: cumulated number of procedures \> 2000

Exclusion criteria

* previous history of medical radiation exposure for radiotherapy or brain scans * for non-interventional cardiologists: occupational history of interventional cardiologist

Design outcomes

Primary

MeasureTime frame
Lens opacitiesup to 1.5 year

Secondary

MeasureTime frame
Visual acuityup to 1.5 year
Major eye disorders (glaucoma, etc…)up to 1.5 year

Countries

France

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 30, 2026