Table 5.

Summary of regression coefficients and standard errors produced by the 625 models which incorporated a range of imputed operating experience data for the two patients who had missing data (see ‘Methods’ section)

Parameter	Original learning effects model parameter estimate	Median and range of parameter estimates from the 625 models of imputed data
Treatment effect: estimate	− 0.916	− 0.946 (− 0.964, − 0.908)
Treatment effect: standard error	0.441	0.441 (0.438, 0.443)
Laparoscopic experience: estimate	− 0.309	− 0.317 (− 0.338, − 0.205)
Laparoscopic experience: standard error	0.404	0.408 (0.349, 0.409)
Robotic experience: estimate	0.074	0.073 (− 0.080, 0.168)
Robotic experience: standard error	0.397	0.392 (0.382, 0.397)
Treatment × laparoscopic experience interaction: estimate	− 0.160	− 0.144 (− 0.226, − 0.135)
Treatment × laparoscopic experience interaction: standard error	1.014	1.012 (0.989, 1.015)
Treatment × robotic experience interaction: estimate	− 1.076	− 1.077 (− 1.149, − 0.970)
Treatment × robotic experience interaction: standard error	0.526	0.524 (0.518, 0.527)