- •This is the first study to compare 6MWD between at hospital discharge and the 4–6-week follow-up after cardiac surgery.
- •6MWD at discharge, regular exercise, age, gender, and NYHA classification were found to independently predict 6MWD at 4–6 weeks after hospital discharge.
- •The equation generated by multivariate analysis to predict 6MWD recovery after hospital discharge.
The six-minute walk test (6MWT) has been used to evaluate postsurgical recovery in cardiac patients. No previous study has compared the 6MWT at follow-up with a baseline, or evaluated the long-term effects of cardiac surgery on post-discharge 6MWT
To identify the factors independently associated with 6MWD, and to develop an equation to predict 6MWT at the 4–6-week follow-up after post-cardiac surgery hospital discharge.
Patient data of elective coronary artery bypass graft (CABG) or non-CABG surgery patients were retrospectively collected. The 6MWT was performed at hospital discharge and at the 4–6-week follow-up. Available demographic and clinical data of patients were analyzed to determine the independent factors of 6MWT. An equation to predict 6MWT were generated by forward stepwise multiple linear regression analysis.
The data of 275 patients (mean age: 62.20±14.57 years, 64.7% male) were analyzed. The mean 6MWT was 179.14±92.18 m at discharge, and increased to 335.20±115.51 m at the 4–6-week follow-up. The 6MWT at the 4–6-week follow-up was independently correlated with 6MWT at discharge, regular exercise, age, gender, and preoperative New York Heart Association (NYHA) classification.
The independent predictors: 6MWT at discharge, regular exercise, age, gender, and NYHA classification were used to generate an equation to predict 6MWT at 4–6 weeks after hospital discharge.
Abbreviations:6MWT (six-minute walk test), CABG (coronary artery bypass graft), NYHA (New York Heart Association), BMI (body mass index), DM (diabetes mellitus), HT (hypertension), DLP (dyslipidemia), CKD (chronic kidney disease), AF (atrial fibrillation), EF (ejection fraction), LOS (length of hospital stay)
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Published online: December 09, 2022
Accepted: December 1, 2022
Received in revised form: November 21, 2022
Received: August 7, 2022
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