Elderly patients (≥ 80 years) with acute calculous cholangitis have similar outcomes as non-elderly patients (< 80 years): Propensity score-matched analysis

Table 4 Subgroup analysis of patients who had abnormal shock index on triage on outcomes in elderly vs non-elderly patients

	Overall cohort, n = 282				PSM cohort, n = 139
	Elderly, n = 194	Non-elderly, n = 88	OR, 95%CI	P value	Elderly, n = 66	Non-elderly, n = 73	OR, 95%CI	P value
Length of hospital stay, d	8 (6-13)	8 (6-10.8)		0.379	8 (5-12)	6 (5-10)		0.217
In-hospital mortality	10 (5.2)	3 (3.4)	1.54 (0.41, 5.74)	0.517	3 (4.5)	3 (4.1)	1.11 (0.22, 5.71)	0.900
30-d mortality	19 (9.8)	4 (4.5)	2.28 (0.75, 6.91)	0.136	5 (7.6)	4 (5.5)	1.41 (0.36, 5.50)	0.616
90-d mortality	20 (10.3)	5 (5.7)	1.91 (0.62, 5.26)	0.205	5 (7.6)	5 (6.8)	1.12 (0.31, 4.04)	0.869

All continuous variables were expressed as median (interquartile range) unless specified. All categorical variables were expressed as n (%) unless otherwise specified. CI: Confidence interval; OR: Odds ratio; PSM: Propensity score matching.