Table 2.
Logistic regression analysis for minimum lifetime and annual caseloads. None of the confounders analyzed correlated significantly with responding that experience with >200 cases is necessary to be an expert. Academic affiliation and <10 years of professional expertise significantly predicted voting for higher (>50) annual caseloads as a criterion for expertise.
| Covariate | Lifetime caseload >200 |
Annual caseload >50 |
||
|---|---|---|---|---|
| Odds Ratio (95%-CI) | p-Value | Odds Ratio (95%-CI) | p-Value | |
| ≥10 vs. <10 years of neurosurgical practice | 0.787 [0.373; 1.660] | 0.5287 | 0.380 [0.175; 0.826] | 0.0145 |
| Academic affiliation vs. non-academic | 1.664 [0.864; 3.206] | 0.1280 | 2.676 [1.405; 5.100] | 0.0028 |
| Senior consultant/department chair vs. resident/junior consultant | 1.597 [0.766; 3.331] | 0.2117 | 1.172 [0.572; 2.399] | 0.6649 |
| Main interest neuro-Oncology: Yes vs. No | 1.072 [0.521; 2.206] | 0.8505 | 1.149 [0.544; 2.428] | 0.7165 |
| Country of Practice: West vs. Other | 1.915 [0.579; 6.331] | 0.2869 | 0.620 [0.198; 1.947] | 0.4134 |
| Country of Practice: North vs. Other | 2.251 [0.589; 8.606] | 0.2358 | 0.348 [0.094; 1.281] | 0.1124 |
| Country of Practice: South vs. Other | 1.793 [0.518; 6.213] | 0.3569 | 0.950 [0.284; 3.184] | 0.9340 |
| Country of Practice: East vs. Other | 2.889 [0.629; 13.271] | 0.1726 | 1.106 [0.227; 5.388] | 0.9003 |