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Diseases 2018, 6(1), 1; doi:10.3390/diseases6010001

Age-Related Differences of Maximum Phonation Time in Patients after Cardiac Surgery

Department of International Health, Graduate School of Health Sciences, Kobe University, 7-10-2 Tomogaoka, Suna-ku, Kobe 654-0142, Japan
Department of Rehabilitation Medicine, St. Marianna University School of Medicine Yokohama-city Seibu Hospital, 1197-1, Yasashi-cho, Asahi-ku, Yokohama 241-0811, Japan
Department of Rehabilitation Medicine, St. Marianna University School of Medicine Hospital, 2-16-1 Sugao, Miyamae-ku, Kawasaki 216-8511, Japan
Department of Physical Therapy, Tokushima Bunri University, 180, Nishihama, Yamashiro-cho, Tokushima 770-8514, Japan
Author to whom correspondence should be addressed.
Received: 28 November 2017 / Revised: 18 December 2017 / Accepted: 20 December 2017 / Published: 21 December 2017
(This article belongs to the Section Cardiology)
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Background and aims: Maximum phonation time (MPT), which is related to respiratory function, is widely used to evaluate maximum vocal capabilities, because its use is non-invasive, quick, and inexpensive. We aimed to examine differences in MPT by age, following recovery phase II cardiac rehabilitation (CR). Methods: This longitudinal observational study assessed 50 consecutive cardiac patients who were divided into the middle-aged group (<65 years, n = 29) and older-aged group (≥65 years, n = 21). MPTs were measured at 1 and 3 months after cardiac surgery, and were compared. Results: The duration of MPT increased more significantly from month 1 to month 3 in the middle-aged group (19.2 ± 7.8 to 27.1 ± 11.6 s, p < 0.001) than in the older-aged group (12.6 ± 3.5 to 17.9 ± 6.0 s, p < 0.001). However, no statistically significant difference occurred in the % change of MPT from 1 month to 3 months after cardiac surgery between the middle-aged group and older-aged group, respectively (41.1% vs. 42.1%). In addition, there were no significant interactions of MPT in the two groups for 1 versus 3 months (F = 1.65, p = 0.20). Conclusion: Following phase II, CR improved MPT for all cardiac surgery patients. View Full-Text
Keywords: age-related difference; cardiac rehabilitation; maximum phonation time age-related difference; cardiac rehabilitation; maximum phonation time

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Izawa, K.P.; Kasahara, Y.; Hiraki, K.; Hirano, Y.; Watanabe, S. Age-Related Differences of Maximum Phonation Time in Patients after Cardiac Surgery. Diseases 2018, 6, 1.

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