Table 1. Demographic characteristics

Variables	Values
Number of participants	37
Age	37.8±5.9
Sex
Male	7 (18.9)
Female	30 (81.1)
PSQI	12.1±3.0
ISI-K	18.0±5.1

Data are expressed as mean±SD except number of participants and sex (number and percentage).
PSQI: Pittsburgh Sleep Quality Index, ISI-K: Korean Version of Insomnia Severity Index.