Table 2.

Changes of sphincter of Oddi myoelectric activity in the process of gallstone formation

Group	Amplitude	Frequency
Control group	142.45 ± 71.25	16.56 ± 4.05
3-wk group	125.06 ± 59.76	13.70 ± 2.88
6-wk group	152.96 ± 81.05	15.10 ± 4.13
9-wk group	100.27 ± 50.42a	8.68 ± 2.35a
12-wk group	40.60 ± 15.03c	13.80 ± 3.79

^aP < 0.05,

^cP < 0.01 vs the control group.