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

Table 2 Pittsburgh Sleep Quality Index and Epworth Sleepiness Scale scores collected during hospitalization and at 6 mo after surgery (n = 139)

Variables	During hospitalization	Post hospitalization	P value
PSQI (points)	9.0 (6.0, 12.0)	5.0 (4.0, 8.0)	< 0.001a
PSQI ≥ 8 (cases)	86 (61.9%)	46 (33.1%)	< 0.001a
ESS (points)	7.0 (4.0, 9.0)	5.0 (3.0, 8.0)	< 0.001a
ESS ≥ 9 (cases)	44 (31.7%)	20 (14.4%)	0.001a

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.