Table 1.

Clinical characteristics of the study groups

Parameter	Excellent (%)	Pass (%)	P value
Sex
Male	27.6	26.7	0.738
Females	72.4	73.3
Bad sleep quality	36.9	94.6	0.000
Bedtime later than midnight	55.3	85.3	0.001
Snoring or coughing	9.2	28	0.003
Subjective rating of bad sleep	15.3	46.6	0.000
Daytime dysfunction	26.1	38.6	0.000
Use of sleep medications	23	22.6	0.758