Table 2.

Overall results of this study.

	Group P (n = 50)	Group R (n = 39)	P value
Mean decrease in Hb† (g/dL ± SD‡)	0.26 ± 0.08	0.34 ± 0.10	0.56
Mean procedure time (min ± SD)	65.2 ± 39.9	105.4 ± 50.2	<0.001
Incidence of perforation, % (n)	0.0 (0)	2.6 (1)	0.25
Incidence of clip use, % (n)	20.0 (10)	48.7 (19)	0.004
Incidence of muscle injury, % (n)	8.0 (4)	25.6 (10)	0.023
Incidence of postoperative fever, % (n)	4.0 (2)	7.7 (3)	0.45
Incidence of postoperative bleeding, % (n)	4.0 (2)	7.7 (3)	0.45
Percentage of patients who resumed eating on the day after ESD, % (n)	84.0 (42)	82.1 (32)	0.81

^†Hb: hemoglobin. ^‡SD: standard deviation.