Key result
New post-cardiac surgery physical activity questionnaire correlates moderately with 6MWD and other standardized surveys.
Why the study?
Physical activity questionnaires assess functional capacity in cardiovascular patients, but none are specifically developed for second phase cardiac surgery rehabilitation.
Is a newly developed physical activity questionnaire valid and reliable for assessing functional capacity in patients within three months following cardiac surgery?
Cross-Sectional (n=94)
No
Is a newly developed physical activity questionnaire valid and reliable for assessing functional capacity in patients within three months following cardiac surgery?
Effect estimate: rs = 0.58 (95% CI 0.42-0.70)
p-value: p=<0.001
A newly developed 27-item physical activity questionnaire is a valid and reliable tool for assessing functional capacity in patients during the first three months after cardiac surgery.
May aid physical activity assessment post-cardiac surgery; hypothesis-generating pending further validation.
Background Physical activity questionnaires assess functional capacity in cardiovascular patients, yet none are specifically developed for second phase cardiac surgery rehabilitation. This study aimed to develop and validate a physical activity questionnaire for patients during the first three months following cardiac surgery. Methods A cross-sectional study was conducted with 94 post-cardiac surgery patients within three months after the surgery. In Phase 1, a physical activity questionnaire was developed for these patients, and later, its content validity was examined, and its reliability was determined. In Phase 2 of the study, the validity of the questionnaire was tested by evaluating its correlation with the 6-minute walk distance (6MWD), the scores from the Duke Activity Status Index (DASI), and the dimension-specific scores of the SF-36 quality of life questionnaire. Results A physical activity questionnaire for post-cardiac surgery patients was developed with 27 items. The Index of Item-ObjectiveCongruence (IOC) showed an average value of 0.91, and the reliability measured by Cronbach's alpha was 0.88. Regarding the validity, the scores from the questionnaire showed a significant correlation with the 6MWD (r s = 0.58), the scores from the DASI (r s = 0.69), and with the physical functioning dimension of the SF-36 questionnaire (r s = 0.40). Conclusion The physical activity questionnaire demonstrated the validity and reliability to assess the functional capacities of post-cardiac surgery patients, as well as correlation with other standardized physical activity questionnaires.
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Songsaengrit et al. (2026) conducted a cross-sectional in Post-cardiac surgery (n=94). Physical activity questionnaire vs. Standardized physical activity tests (6MWD, DASI, SF-36) was evaluated on Correlation between the physical activity questionnaire score and the 6-minute walk distance (6MWD) (rs = 0.58, 95% CI 0.42-0.70, p=<0.001). The newly developed physical activity questionnaire for post-cardiac surgery patients demonstrated a significant correlation with the 6-minute walk distance (rs = 0.58) and other standardized questionnaires.
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