. 2016 Nov 21;4(12):E1267–E1274. doi: 10.1055/s-0042-118291

Table 5. Duration and number of EBD sessions.

	Prophylactic treatment				P value
	No treatment	Steroid injection	Steroid injection followed by oral steroid	Total	No treatment vs. steroid injection	No treatment vs. steroid injection followed by oral steroid	Steroid injection vs. steroid injection followed by oral steroid
	n = 14	n = 30	n = 24	n = 68	No treatment vs. steroid injection	No treatment vs. steroid injection followed by oral steroid
Case of stricture	14	19	12	45
Time to achieve EBD success (days) median (IQR)	173 (85.8 – 230)	84 (53.5 – 123)	92.5 (64.3 – 129)	92 (66 – 176)	0.58	0.053	0.26
Number of EBD sessions median (IQR)	12.5 (7.5 – 16)	6 (4.5 – 10.5)	5.5 (4 – 8.3)	7 (5 – 12)	0.046	0.002	0.51
1~2	0	4	2	6
3~5	2	5	4	11
≥ 6	12	10	6	28
Refractory stricture rate	12/14 (86 %)(95 %CI: 57 – 98 %)	10/30 (33 %)(95 %CI: 17 – 53 %)	6/24 (25 %)(95 %CI: 10 – 47 %)	28/68 (41 %)(95 %CI: 29 – 54 %)	0.002	< 0.001	0.56

EBD, endoscopic balloon dilation; IQR, interquartile range; 95 %CI, 95 % confidence interval. We analyzed data for Groups B and C without Group A, and excluded the 2 cases that could not be evaluated for whether they had refractory strictures.