Ralation Between Cardiorespiratory Fitness and Mean Corrected Intraocular Pressure (NCT07676747) | Clinical Trial Compass
CompletedNot Applicable
Ralation Between Cardiorespiratory Fitness and Mean Corrected Intraocular Pressure
China2,921 participantsStarted 2025-07-01
Plain-language 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.
Who can participate
Age range
18 Years – 69 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Age 18-70 years;
. Ability to complete standardized cardiorespiratory fitness testing and provide valid data; and
. Ability to cooperate with a comprehensive ophthalmologic examination.
Exclusion criteria
. Any history of glaucoma or ocular hypertension, or detection of glaucoma suspect signs such as cup-to-disc ratio ≥0.7, interocular cup-to-disc ratio asymmetry \>0.2, or localized retinal nerve fiber layer defects;
. Ocular diseases or surgical history affecting IOP measurement or optic nerve head assessment, such as corneal disease, uveitis, intraocular surgery, high myopia (spherical equivalent ≤ -6.00 D), or other optic nerve/retinal diseases;
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Mean corrected intraocular pressure (IOP) of both eyes
. Systemic diseases that could significantly interfere with IOP, optic nerve blood supply, or cardiorespiratory function, such as uncontrolled diabetes mellitus, severe cardiovascular or cerebrovascular disease, or chronic obstructive pulmonary disease;
. Current use of topical or systemic medications known to affect IOP, including IOP-lowering eyedrops, systemic beta-blockers, or glucocorticoids;
. Contraindications to cardiorespiratory fitness testing, such as severe musculoskeletal disorders or uncontrolled arrhythmias;
. A documented history of hypertension, current use of antihypertensive medications, or abnormal blood pressure on a single measurement that did not normalize on re-examination (systolic blood pressure \[SBP\] ≥140 mmHg or diastolic blood pressure \[DBP\] ≥90 mmHg); and
. Missing key study variables that precluded further analysis.