Table 4. Determinants of Selected Cancer Treatments: Multilevel Regression Results .
| Immediate Breast Cancer Reconstruction | Sentinel Node Lymph Biopsy | |||||||
| 2005 | 2012 | 2005 | 2012 | |||||
| (1) | (2) | (1) | (2) | (1) | (2) | (1) | (2) | |
| Intercept | 0.001*** | 0.001*** | 0.004*** | 0.003*** | 0.000*** | 0.002*** | 0.016*** | 0.031*** |
| Patient Variables | ||||||||
| Age (ref ≥70): | ||||||||
| ≤50 | 22.851*** | 22.287*** | 12.541*** | 12.416 | 1.001 | 0.996 | 0.827*** | 0.824*** |
| 51-60 | 14.426*** | 14.027*** | 7.941*** | 7.877** | 1.113** | 1.107** | 0.995 | 0.993 |
| 61-70 | 6.883*** | 6.740*** | 4.255*** | 4.212*** | 1.209*** | 1.206*** | 1.151*** | 1.149*** |
| Charlson index (ref ≥2): | ||||||||
| 0 | 1.799*** | 1.828*** | 1.895*** | 1.912*** | 1.470*** | 1.471*** | 1.492*** | 1.492*** |
| 1 | 1.250 | 1.270 | 1.273 | 1.278*** | 1.283*** | 1.290*** | 1.402*** | 1.404*** |
| Carcinoma in situ (ref = yes): | ||||||||
| No | 0.318*** | 0.323*** | 0.373*** | 0.377*** | 3.380*** | 3.387*** | 3.781*** | 3.785*** |
| Total mastectomy with axillary node dissection (ref = yes): | ||||||||
| No | 3.438*** | 3.421*** | 5.924*** | 5.930*** | 5.888*** | 5.894*** | 7.279*** | 7.286*** |
| Chemotherapy (ref = yes): | ||||||||
| No | 2.773*** | 2.768*** | 2.259*** | 2.246 | ||||
| Residence area income (ref = High >66%): | ||||||||
| Low (<33%) | 0.714*** | 0.720*** | 0.868* | 0.869** | 0.905** | 0.908** | 0.934** | 0.934** |
| Medium (33-66%) | 0.932 | 0.931 | 1.006 | 1.000 | 0.944 | 0.943 | 0.989 | 0.988 |
| Hospital Variables | ||||||||
| Breast cancer volume (ref ≥110): | ||||||||
| ≤20 | 0.309*** | 0.198*** | 0.052*** | 0.130*** | ||||
| 21-49 | 0.365*** | 0.430*** | 0.084*** | 0.542*** | ||||
| 50-109 | 0.580** | 0.815*** | 0.375*** | 0.590*** | ||||
| Hospital type (ref = CH): | ||||||||
| CHR | 2.662** | 2.643** | 3.102** | 1.709* | ||||
| CLCC | 4.019*** | 3.034*** | 17.184*** | 2.563** | ||||
| PL | 1.498 | 2.565 | 1.374 | 0.763 | ||||
| PNL | 2.382*** | 2.641 | 0.717 | 0.889 | ||||
| Competition ref = Low (HHI >5000): | ||||||||
| Medium (HHI: 3000-5000 | 3.068*** | 1.994** | 1.692** | 1.127*** | 3.815*** | 1.534 | 2.529*** | 1.779*** |
| High (HHI <3000) | 3.873*** | 2.651*** | 2.404*** | 1.542 | 2.542*** | 1.283 | 1.322* | 0.949 |
| N | 15 166 | 15 166 | 16 707 | 16 707 | 54 904 | 54 904 | 62 250 | 62 250 |
| ICC | 0.495 | 0.490 | 0.292 | 0.312 | 0.723 | 0.670 | 0.440 | 0.405 |
| MOR | 5.511 | 5.412 | 3.038 | 3.187 | 16.158 | 11.664 | 4.643 | 4.150 |
Abbreviations: CH, public hospitalsCHR, regional teaching hospitals; CLCC, cancer centers; PL, private for profit; PNL, private non-profit; ICC, intra-class coefficient; MOR, median odds ratio.
* Significant at 10%; ** Significant at 5%; *** Significant at 1%.