Table 2.
Percentage of Patients Receiving Radiation Therapy Pre- and Post-RCT Dissemination
| Variable | Overall | Pre-RCT Dissemination | Post-RCT Dissemination | P* |
|---|---|---|---|---|
| Overall | 76.5 | 78.8 | 74.5 | < .001 |
| Age group, years | ||||
| 70-74 | 90.1 | 91.3 | 89.1 | .01 |
| 75-79 | 83.5 | 86.0 | 81.0 | < .001 |
| 80-84 | 68.8 | 69.7 | 68.0 | .33 |
| 85-94 | 35.1 | 37.4 | 33.3 | .08 |
| Race | ||||
| White | 76.5 | 78.9 | 74.3 | < .001 |
| Black | 72.2 | 69.3 | 74.7 | .20 |
| Other | 80.7 | 84.4 | 77.9 | .07 |
| No. of comorbidities | ||||
| 0 | 81.5 | 83.0 | 79.9 | .003 |
| 1-2 | 75.5 | 78.3 | 73.1 | < .001 |
| ≥ 3 | 63.7 | 64.9 | 62.8 | .37 |
| Marital status | ||||
| Married | 83.3 | 86.1 | 80.9 | < .001 |
| Not married | 71.1 | 73.1 | 69.3 | < .001 |
| Unknown | 70.6 | 71.7 | 70.0 | .71 |
| Median income, $ | ||||
| < 33,000 | 71.7 | 72.3 | 71.2 | .61 |
| 33,000-40,000 | 76.6 | 78.7 | 74.7 | .05 |
| 40,001-50,000 | 74.7 | 78.1 | 71.7 | < .001 |
| 50,001-63,000 | 78.3 | 79.2 | 77.5 | .27 |
| > 63,000 | 78.7 | 82.5 | 75.7 | < .001 |
| Unknown | 50.0 | 100.0 | 0.0 | .01 |
| Tumor size, cm | ||||
| < 1 | 76.3 | 78.8 | 74.1 | < .001 |
| 1-2 | 76.6 | 78.7 | 74.7 | < .001 |
| County-level use of mammography screening, % | ||||
| 24.5-42.6 | 75.9 | 78.3 | 73.8 | < .001 |
| 42.9-58.6 | 78.0 | 80.3 | 76.1 | < .001 |
| Other† | 70.9 | 72.9 | 69.1 | .26 |
| County-level hospital bed density (per 100,000) | ||||
| 0-237 | 75.3 | 77.4 | 73.4 | < .001 |
| 238-3,981 | 77.3 | 79.6 | 75.2 | < .001 |
Abbreviation: RCT, randomized controlled trial.
*
P value is for a χ2 test between receipt of radiation therapy and time period within strata of covariates.
†
Mammography rate was not estimated because there were fewer than 100 female patients without cancer in the data set residing in that county.