. 2021 Apr 3;12(1):118–127. doi: 10.34172/apb.2022.013

Table 4. The effects of interventions on the length of mechanical ventilation, lengths of ICU and hospital stays, and mortality in the study patients .

Outcome	Melatonin (n=30) ^#	Placebo (n=30) ^#	P value ^*
Duration of mechanical ventilation (day)^a	3 (0.50-8)	3 (0-10)	0.645
Length of ICU stay (day)^a	13 (9-22)	14 (6.75-27.25)	0.987
Length of hospital stay (day)^a	16 (14-30)	19 (10.75-33.25)	0.719
Mortality rate during hospitalization, dead/alive^b	2/28 (6.66)	0/30 (0)	0.492
Mortality rate after three months, dead/alive^b	6/23 (20.69)	2/27 (6.89)	0.313

ICU: intensive care unit.

^#At month 3, data regarding the life status of two patients (one in each group) could not be reached; ^*Mann-Whitney U test and chi-square test were used to compare numerical and nominal values, respectively;^aMedian (first and third quartiles); ^bNumber (%).