Key result
Post-cardiac surgery daytime sleepiness is linked to worse health utility, regardless of age.
Why the study?
To examine age-related differences in daytime sleepiness and health utility and evaluate their relationship in patients 5 months after cardiac surgery.
Are there age-related differences in daytime sleepiness and health utility, and does daytime sleepiness correlate with health utility in patients 5 months after cardiac surgery?
Cross-Sectional (n=51)
Are there age-related differences in daytime sleepiness and health utility, and does daytime sleepiness correlate with health utility in patients 5 months after cardiac surgery?
Absolute Event Rate: 4.05% vs 5.14%
p-value: p=0.22
Daytime sleepiness correlates negatively with health utility in the chronic recovery phase 5 months after cardiac surgery, regardless of patient age.
Daytime sleepiness was associated with lower health utility 5 months after cardiac surgery independent of age; leaves open causality and clinical relevance.
Background Daytime sleepiness can be assessed by the Epworth Sleepiness Scale (ESS), which is widely used in the field of sleep medicine as a subjective measure of a patient’s sleepiness. Also, health utility assessed by the mean Short-Form Six-Dimension (SF-6D) score, one of several preference-based utility measures, is an important measure in health care. We aimed to examine age-related differences in daytime sleepiness and health utility and their relationship in patients 5 months after cardiac surgery. Methods; This cross-sectional study assessed 51 consecutive cardiac surgery patients who were divided into a middle-aged (<65 years, n = 29) and older-age group (≥65 years, n = 22). The mean ESS and SF-6D utility scores were measured at 5 months after cardiac surgery and compared. In addition, the relationship between ESS and SF-6D utility scores were assessed. Results; There were no significant differences between the middle-aged and older-aged groups in either the mean ESS (5.14 ± 2.96 vs. 4.05 ± 3.23, p = 0.22) or SF-6D utility (0.72 ± 0.14 vs. 0.71 ± 0.10, p = 0.76) scores. However, there was a negative correlation between both values in all of the patients after cardiac surgery (r = −0.41, p = 0.003). Conclusions; Although there were no age-related differences in the ESS and SF-6D utility values between the two groups, there was a negative correlation between these values in all patients at 5 months after cardiac surgery. This suggested that sleepiness is associated with decreased utility scores in patients at 5 months after cardiac surgery.
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Izawa et al. (2018) conducted a cross-sectional in Patients 5 months post-cardiac surgery (CABG or valve replacement/valvuloplasty) (n=51). Older age (≥65 years) vs. Middle age (<65 years) was evaluated on Mean Epworth Sleepiness Scale (ESS) score (p=0.22). There was a significant negative correlation between daytime sleepiness and health utility scores (r = -0.41, p = 0.003) at 5 months after cardiac surgery, with no significant differences in these metrics based on age.
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