Table 1. Baseline characteristics for patients in whom placement of either a bi-flanged metal stent or a lumen apposing stent was attempted for walled-off pancreatic necrosis.

	BFMS (n = 40)	LAMS (n = 32)	P value 1
Age, median (range), years	63 (11 – 81)	57 (19 – 81)	0.94
Male, n (%)	27 (67.5)	18 (56.3)	0.34
Aetiology, n
Gallstone	33	20	0.81
Alcohol related	1	3	0.32
Other/unknown	6	9	0.24
Size of WON, mean (95 %CI), cm	14 (11 – 17)	15 (7.7 – 21.7)	0.85
Estimated necrosis, median % (95 %CI)	35 (30 – 50)	40 (20 – 50)	0.16
Time from acute episode to drainage, median (95 %CI), weeks	7.7 (5.8 – 10.8)	10.6 (6.0 – 31.3)	0.10
Day-case procedures, n (%)	5 (12.5)	13 (40.6)	0.01
Reason for drainage, n
Sepsis	23	13	0.24
Pain	2	6	0.13
Pain and sepsis	10	3	0.12
Inability to eat adequately	5	9	0.14
Other	0	1	0.44
Admission on ICU during hospital stay, n (%)	13 (32.5)	7 (21.9)	0.43

BFMS, bi-flanged metal stent; LAMS, lumen-apposing metal stent; WON, walled-off necrosis; CI, confidence interval; ICU, intensive care unit.

¹ All Student’s t test or Mann – Whitney U test for continuous values or Fisher’s exact/chi-squared test for categorical values.