Table 3. Characteristics of sleep quality among patients after surgery (n=374)

Variables	Frequency	Percentage
Subjective sleep quality
Very good	19	5.1
Fairly good	95	25.4
Fairly bad	104	27.8
Very bad	156	41.7
Habitual sleep efficiency
≥ 85%	54	14.4
75-84%	74	19.8
65-74%	76	20.3
< 65%	170	45.5
Quality of sleep
Good	82	21.9
Poor	292	78.1