Warm Steam Inhalation before Bedtime Improved Sleep Quality in Adult Men

Table 4

Subjective sleep scores in the morning.

	Sham	Steam inhalation
Sleep initiation (mm) (0: poor, 100: good)	58.6 ± 21.1	66.0 ± 16.9	0.058
Sleep quality (mm) (0: low, 100: good)	49.4 ± 13.3	59.5 ± 16.0	0.005
Feeling of being refreshed (mm) (0: poor, 100: good)	50.2 ± 12.1	52.7 ± 21.3	0.569

Values are expressed as means ± standard deviations. Comparisons are relative to the control session (Wilcoxon signed-rank test).