Table 2.

Comparison of BCR and SSEP latencies among sphincter subgroup, non-sphincter subgroup and the control group (means ± SD)

Group	N	BCR latencies (ms)		SSEP latencies (ms)
		Left	Right
Sphincter subgroup	24	68.7 ± 4.8a,b	69.3 ± 5.0a,b	42.9 ± 1.8a
Non-sphincter subgroup	29	59.2 ± 5.5a	59.8 ± 5.6a	41.3 ± 1.2a
Control group	40	32.7 ± 5.3	33.6 ± 5.8	38.1 ± 1.1

^a P < 0.05 compared with control group;

^b P < 0.05 compared with non-sphincter subgroup.