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). This longitudinal observational study assessed 50 consecutive cardiac patients who were divided into the middle-aged group (<65 years, = 29) and older-aged group (≥65 years, = 21). MPTs were measured at 1 and 3 months after cardiac surgery, and were compared. 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, < 0.001) than in the older-aged group (12.6 ± 3.5 to 17.9 ± 6.0 s, < 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, = 0.20). Following phase II, CR improved MPT for all cardiac surgery patients.
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| http://dx.doi.org/10.3390/diseases6010001 | DOI Listing |
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