Medical treatment for sphincter of oddi dysfunction: Can it replace endoscopic sphincterotomy?

Table 4 Results after intermediate follow-up (29.8 ± 3 mo) n (%)

Rate of improvement
Total rate	37 (62.7)
Without endoscopic sphincterotomy	28 (62)	P = 0.88
With endoscopic sphincterotomy	9 (64.2)
According to initial lengthening of HDTT
With lengthening	19 (59.4)
Without lengthening	18 (66.7)	P = 0.59
According to the Milwaukee group
Type 1	6/11 (54.5)
Type 2	23/34 (67.6)	P = 0.75
Type 3	8/14 (57.1)

HDTT: Hile to duodenum transit time.