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 | |