Key result
The FRIEND equation accurately estimated VO2max in CAD patients (24.15 vs. directly measured 24.16 mL/kg/min, p=0.986), whereas the ACSM equation significantly overestimated it.
Why the study?
The ACSM equation was traditionally preferred for estimating VO2max, but a more precise FRIEND equation was developed for healthy individuals, warranting comparison against directly measured VO2max in CAD patients.
Do the FRIEND and ACSM equations accurately estimate VO2max compared to direct measurement in CAD patients?
Population
293 CAD patients participating in cardiac rehabilitation
Comparison
ACSM and FRIEND estimated VO2max vs directly measured VO2max
Design
Observational study
Authors
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May support preferring FRIEND over ACSM for VO2max estimation in CAD; leaves open prospective validation before practice change.
Observational (n=293)
Do the FRIEND and ACSM equations accurately estimate VO2max compared to direct measurement in CAD patients?
Absolute Event Rate: 24.15% vs 24.16%
p-value: p=0.986
The FRIEND equation provides a more accurate estimation of cardiorespiratory fitness than the traditional ACSM equation in patients with coronary artery disease.
Jang et al. (2020) conducted an observational in Coronary artery disease (CAD) (n=293). FRIEND equation vs. ACSM equation and direct measurement was evaluated on VO2max (mL/kg/min) (p=0.986). The FRIEND equation accurately estimated VO2max in CAD patients (24.15 vs. directly measured 24.16 mL/kg/min, p=0.986), whereas the ACSM equation significantly overestimated it.
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