Table 3.

Subgroup analysis for resection velocity.

Subgroup	Velocity, min/cm2	P value
Case  1~40/case  41~50	9.8/9.66	0.96
Case  1~20/case  21~50	11.26/8.79	0.32
Rectum/nonrectum	12.98/8.27	0.11
G/NG	7.73/10.95	0.39

G: granular; NG: nongranular.