Table 3.
Random-effects model: Mastectomy versus Breast-conserving surgery1
| Variables | A2 Total Variation |
B3 Surgeon Variation |
C4 % of surgeon variation explained |
|---|---|---|---|
| Patient clinical and demographics | 14% | 7% | NA |
| Contraindication to BCS | 37% | 4% | 43% |
| Surgeon demographics | 37% | 4% | 0 |
| Surgeon practice factors | 38% | 4% | 0 |
| Surgeon attitudes about treatment | 38% | 4% | 0 |
1)
N= 1639 patients and 277 surgeons
2)
Column A: R2 results after inclusion of patient and surgeon variable sets
3)
Column B: % total variation attributable to individual surgeons
4)
Column C: % of between -surgeon variation explained after including variable sets