Table 3.
Adjusted Odds Ratios of Chemotherapy Use For HRR Characteristics (Model [4])
| Odds Ratio | p-Value | |
|---|---|---|
| Population density (population per square) | 0.82 | .111 |
| Hospitals (n) | 1.00 | .001 |
| Physicians (per 1,000 population) | 1.09 | .278 |
| Oncologists (per 1,000 physician) | 0.99 | .729 |
| Oncology facilities (per hospital) | 2.49 | .000 |
| HMO penetration (%) | 0.58 | .275 |
| Teaching hospitals (per SEER hospital) | 0.96 | .920 |
| Control variables added | ||
| Age, stage, comorbidities, time | Yes | |
| Race, education, income | Yes | |
| Fit of model | ||
| C-statistic | 0.80 | |
HMO, health maintenance organization; HRR, health referral region; SEER, Surveillance, Epidemiology, and End Results.