Table 4

Hierarchical multivariate regression analysis for 30-day mortality following upper GI EMR

Variable	Cancer cohort			Non-cancer cohort
Variable	OR	95% CI	p Value	OR	95% CI	p Value
Age ≥70 years	3.14	1.29 to 7.60	0.011	2.01	1.33 to 3.04	0.001
Female gender	1.08	0.55 to 2.10	0.821	0.54	0.36 to 0.82	0.003
Charlson Comorbidity Index ≥3	2.22	1.06 to 4.69	0.036	5.18	3.13 to 8.59	<0.001
Endoscopist volume*	0.34	0.17 to 0.68	0.002	0.55	0.32 to 0.96	0.034
Hospital volume†	0.69	0.34 to 1.37	0.283	0.74	0.45 to 1.21	0.230
Cancer surgeon endoscopist	0.72	0.27 to 1.88	0.502	–	–	–

*Endoscopist volume threshold of two cases per year used to dichotomise study cohort.
†Hospital volume of eight cases per year used to dichotomise study cohort.
EMR, endoscopic mucosal resection.