Analysis of sleep characteristics and clinical outcomes of 139 adult patients with infective endocarditis after surgery

Table 3 Comparison of Pittsburgh Sleep Quality Index and Epworth Sleepiness Scale scores at 6 mo after surgery between Group 1 (n = 53) and Group 2 (n = 86)

	Total (n = 139)	Group 1 (n = 53)	Group 2 (n = 86)	P value
PSQI (points)	5.0 (4.0, 8.0)	3.0 (2.0, 5.0)	7.0 (5.0, 10.0)	< 0.001a
PSQI ≥ 8 (cases)	46 (33.1%)	4 (7.5%)	42 (48.8%)	< 0.001a
ESS (points)	5.0 (3.0, 8.0)	4.0 (3.0, 7.0)	5.5 (3.0, 8.0)	0.194
ESS ≥ 9 (cases)	20 (14.4%)	5 (9.4%)	15 (17.4%)	0.191

Data were analyzed using the Wilcoxon rank-sum test or χ² test where appropriate. Data are presented as median and interquartile range (25^th and 75^th percentile) or quantity and percentage (%) where appropriate.

^aP < 0.05. PSQI: Pittsburgh Sleep Quality Index; ESS: Epworth Sleepiness Scale.