Table 5.
Selected correlations of attributes with respect to referral frequency. The p-value for all correlations is less than 0.01, except for the ones with an asterisk
| Strong Correlations | Correlation |
|---|---|
| HCPCS: Initial Hospital Care | 0.46 |
| Number of Hospital Affiliations | 0.43 |
| Number of HCPCS Beneficiaries | 0.33 |
| Relative Procedure Volume | 0.26 |
| HCPCS: X-ray Exam of Abdomen | 0.24 |
| Number of Rx Beneficiaries | 0.23 |
| Internal Medicine and Cardiovascular Disease | 0.22 |
| Diagnostic Radiology | 0.21 |
| Family Medicine | −0.20 |
| Obstetrics and Gynecology | −0.16 |
| Number of Fellowships | 0.10 |
| Negligible Correlations | |
| Hospital Score | −0.02 |
| Patient Review Ratings | [−0.01,0.01]* |
| Number of Patient Reviews | −0.01 |
| Number of Accepted Insurances | 0.02 |
| Years of Experience | 0.01 |
| Medical School Rank | 0.03 |
| Individual Insurers | [−0.4,0.5]* |
| Residency Rank | 0.01* |