Table 1.

Baseline characteristics of the melatonin and placebo groups

	Melatonin	Placebo	P value
Age	65.7±9.34	66.85±9.62	0.658
BMI	23.62±4.48	24.87±4.72	0.323
PSQI	11.63±3.96	10.66±2.48	0.206
ESS	7.04±4.43	6.33±3.5	0.530

BMI, body mass index; PSQI, Pittsburgh Sleep Quality Index; ESS, Epworth Sleepiness Scale.