Evaluation of the conversion rate as it relates to preoperative risk factors and surgeon experience: a retrospective study of 4013 patients undergoing elective laparoscopic cholecystectomy

Table 2 Impact of patient/physician-related characteristics on conversion analyzed using multivariate analysis (logistic regression)

	B	p	OR	95% CI for OR
	B	p	OR	Lower	Upper
Gender (male)	0.459	0.013	1.582	1.104	2.268
Age	0.031	< 0.001	1.032	1.019	1.045
Previous acute cholecystitis	1.229	< 0.001	3.419	2.219	5.268
Previous US-guided gallbladder drainage	0.796	0.132	2.218	0.788	6.245
Previous upper abdominal surgery	1.705	< 0.001	5.501	3.458	8.750
Previous lower abdominal surgery	0.269	0.138	1.308	0.918	1.866
Previous ERCP	0.784	< 0.001	2.190	1.441	3.329
Time since graduation (baseline: 0–6 years)
Time since graduation: 7–15 years	0.211	0.499	1.235	0.670	2.274
Time since graduation: > 15 years	0.552	0.051	1.737	0.997	3.026
Constant	− 6.099	< 0.001

B regression coefficient, CI confidence interval, OR odds ratio, CI confidence interval, ERCP endoscopic retrograde cholangiopancreatography, US ultrasound

ISSN: 1471-2482