Table 1. Sleep assessment prior to the intervention.

	CONT (n=12)	AROM (n=12)
PSQI-J (scores)	5.7 ± 3.0	5.8 ± 3.2
Sleep disorder (n)	6 (50.0%)	7 (58.3%)
Sleeping hour (hours)	6.5 ± 0.7	6.7 ± 0.8

CONT: control group; AROM: aromatherapy group; PSQI-J: the Pittsburgh Sleep Quality Index for Japanese.

Values, except sleep disorder, are expressed as mean and SD. Value of sleep disorder is expressed as number of participants (rate).

Sleep disorder is defined as PSQI-J score ≥6.

The average of sleep hours was calculated by self-reported data during intervention period (from day 0 to day 7).