	Adverse events
	≥90% vs <90% 30 day follow-up Adjusted *
	OR	95% CI	P value
Intraoperative	0.76	0.66 to 0.87	0.0002
Total postoperative	1.92	1.76 to 2.11	<0.0001
Pancreatitis	2.04	1.72 to 2.43	<0.0001
Bleeding	1.38	1.08 to 1.79	0.0100

Figures in bold are statistically significant.
*Adjusted for sex, age, ASA class, acute interventions and indications.
ASA, American Society of Anesthesiologists; ERCP, endoscopic retrograde cholangiopancreatography.