Table 4.

Adjusted analysis

	Crude		Adjusted
Perforation event rate	OR	95% CI	OR	95% CI
Right side (ref = left)	0.792	0.699, 0.897	0.784	0.690, 0.891
Underglove (ref = overglove)	0.483	0.423, 0.551	0.490	0.428, 0.560
Surgical specialty (ref = cardiothoracic surgery/plastic surgery) Orthopedic surgery Colorectal surgery Neurosurgery Trauma/acute general surgery	2.004 1.134 0.803 1.308	1.687, 2.388 0.907, 1.414 0.611, 1.046 1.053, 1.623	2.163 1.069 0.810 1.344	1.811, 2.592 0.852, 1.338 0.616, 1.058 1.079, 1.674
Duration of procedure (min)	1.001	1.000, 1.001	1.002	1.001, 1.002
Brands 2,3,4 combined (ref = Brand 1)	1.111	0.978, 1.264	1.061	0.931, 1.211