Table 3.

Estimated regression coefficients (log-odds ratios), 95% confidence intervals and Wald test p values for the treatment and learning effects from the primary analysis and learning effects models

Model	Effect	Adjusted estimate	95% confidence interval for adjusted estimate		p
			Lower	Upper
Primary analysis model	Robotic surgery (vs. laparoscopic)	− 0.488	− 1.168	0.191	0.158
Learning effects model	Robotic surgery (vs. laparoscopic)	− 0.916	− 1.784	− 0.049	0.039
	Surgeon’s robotic experience (log; 1-unit increase)	0.074	− 0.706	0.854	0.852
	Surgeon’s laparoscopic experience (cubic; 10^8-unit increase)	0.309	− 1.1033	0.4852	0.445
	Interaction: surgeon’s robotic experience (log; 1-unit increase) × robotic surgery	− 1.076	− 2.110	− 0.041	0.042
	Interaction: surgeon’s laparoscopic experience (cubic; 10^8-unit increase) × robotic surgery	− 0.160	− 2.153	1.833	0.875