Table S1.

Comparison of clinical and demographic characteristics of patients who returned the questionnaires (n=310) and the non-respondents (n=289) enrolled in the study by ICU memories status

	Eligible to participate in the study (n=599)
	Respondents (n=310, 52%)	Non-respondents (n=289, 48%)	P-value*
Age (years), median (IQR)	60 (50–70)	55 (39–70)	0.205
SAPS, median (IQR)	38 (30–47)	38 (28–49)	0.861
LoS ICU, median (IQR)	8 (5–13)	7 (4–12)	0.147
LoS hospital, median (IQR)	21 (14–32)	19 (12–31)	0.098
Sex, n (%)
Female	129 (42)	114 (39)	0.589
Male	181 (58)	175 (61)
Diagnostic category, n (%)
Medical	176 (57)	183 (63)	0.849
Trauma	49 (16)	47 (16)
Scheduled surgery	34 (11)	26 (9)
Non-scheduled surgery	51 (16)	33 (11)

Note:

^*Mann–Whitney U test was used for continuous variables and chi-square test for categorical ones.

Abbreviations: ICU, intensive care unit; SAPS, Simplified Acute Physiology Score; LoS, length of stay; IQR, interquartile range.