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Ralation Between Cardiorespiratory Fitness and Mean Corrected Intraocular Pressure

NCT07676747 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 2921

Last updated 2026-06-30

No results posted yet for this study

Summary

Objective: To investigate the association between cardiorespiratory fitness and mean corrected intraocular pressure (IOP) in a normotensive health check-up population, and to evaluate potential differences across age and sex strata.

Methods: This cross-sectional study consecutively enrolled adults aged 18-70 years who completed cardiorespiratory fitness testing and ophthalmologic examinations at the Health Management Center of Sichuan Provincial People's Hospital between July 1, 2019 and December 31, 2025. Individuals were excluded if they had a history of glaucoma, ocular diseases interfering with IOP measurement, systemic diseases or medications affecting IOP, contraindications to fitness testing, or abnormal blood pressure. A final sample of 2,921 normotensive individuals was included. Cardiorespiratory fitness was assessed by estimated maximal oxygen uptake (VO₂max). After age- and sex-stratified grouping, low cardiorespiratory fitness was used as the reference, and the remainder were defined as the moderate-to-high cardiorespiratory fitness group. The primary outcome was the mean corrected IOP of both eyes. Multiple imputation, multivariable linear regression, and age- and sex-stratified analyses were used to evaluate the association.

Conditions

Interventions

OTHER

Mean corrected intraocular pressure (IOP) of both eyes

Intraocular pressure (IOP) was measured in both eyes using a non-contact tonometer (CT-1P, Topcon Corporation, Tokyo, Japan). The corrected IOP was automatically calculated by the device's built-in algorithm based on central corneal thickness. In Chinese healthy adults, corneal thickness is significantly associated with sex and age, which has important clinical implications for the correction of IOP measurements. To minimize the influence of diurnal fluctuation on IOP measurements, all IOP assessments were uniformly scheduled between 7:30 AM and 11:00 AM. Two measurements were taken for each eye and the average was recorded. The mean corrected IOP, defined as the average of the corrected IOP values of both eyes, was used as the primary outcome measure in this study.

Sponsors & Collaborators

  • Sichuan Academy of Medical Sciences

    lead OTHER

Eligibility

Min Age
18 Years
Max Age
69 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2025-07-01
Primary Completion
2025-12-31
Completion
2026-03-01

Countries

  • China

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07676747 on ClinicalTrials.gov