Table 1.

Results of a Univariate Analysis of Patient-related Factors for Perforation during Colorectal Endoscopic Submucosal Dissection.

Characteristics	Total	Perforation (+)	Perforation (-)	p
Number of patients	398	12 (3%)	386 (97%)
Age (years; mean±SD)	68.7±9.9	70.8±8.1	68.6±10	N.S.
Sex
Male	249	5 (2.0%)	244 (98.0%)	N.S.
Female	149	7 (4.7%)	142 (95.3%)
Anticoagulants and/or antiplatelet drugs
(+)	50	3 (6%)	47 (94%)	N.S.
(-)	348	9 (2.6%)	339 (97.4%)

SD: standard deviation, N.S.: not significant