TABLE 3. Variations in Modes of Chemotherapy Administration for Breast Carcinoma based on Age, Race, Tumor Stage, Year of Diagnosis, and Geographic Area.
| % of patients, by hierarchical order of modes of chemotherapy administration (low to high) |
||||||
|---|---|---|---|---|---|---|
| Subcutaneous, intramuscular, or intralesional | Intravenous-push technique | Intravenous-infusion lasting < 1 hr | Intravenous-infusion lasting 1-8 hr | Intravenous-infusion lasting longer than 8 hr and requiring a pump | Total no. of cases (%) | |
| Age | ||||||
| 65-69 | 0.5 | 11.0 | 33.4 | 38.8 | 16.2 | 2663 (100.0) |
| 70-74 | 0.5 | 12.6 | 33.9 | 38.3 | 14.7 | 1480 (100.0) |
| 75-79 | 0.5 | 13.6 | 32.5 | 41.1 | 12.3 | 799 (100.0) |
| 80-84 | 1.2 | 11.1 | 32.5 | 39.3 | 12.7 | 252 (100.0) |
| 85 | 3.2 | 12.9 | 27.4 | 40.3 | 16.1 | 62 (100.0) |
| Race/ethnicity | ||||||
| White | 0.6 | 12.0 | 33.8 | 39.3 | 14.4 | 4618 (100.0) |
| African | 0.9 | 8.9 | 29.2 | 36.5 | 24.5 | 449 (100.0) |
| Americans | ||||||
| Other ethnicities | 0 | 17.6 | 35.2 | 39.8 | 7.4 | 176 (100.0) |
| Unknown | 0 | 0 | 38.5 | 53.9 | 7.7 | 13 (100.0) |
| Tumor stage | ||||||
| Stage I | 1.2 | 16.8 | 39.2 | 33.4 | 9.3 | 677 (100.0) |
| Stage II | 0.4 | 12.8 | 35.2 | 37.8 | 13.8 | 2888 (100.0) |
| Stage III | 0.7 | 8.2 | 27.9 | 43.1 | 20.2 | 878 (100.0) |
| Stage IV | 0.5 | 8.3 | 26.8 | 44.8 | 19.7 | 594 (100.0) |
| Un-staged | 0.9 | 9.6 | 32.9 | 42.5 | 14.2 | 219 (100.0) |
| Comorbidity score | ||||||
| 0 | 0.6 | 11.8 | 33.8 | 40.2 | 13.6 | 3532 (100.0) |
| 1 | 0.5 | 11.7 | 33.4 | 37.2 | 17.2 | 1132 (100.0) |
| 2 | 0.3 | 12.7 | 28.9 | 38.9 | 19.2 | 401 (100.0) |
| 3 | 1.6 | 13.1 | 36.7 | 30.4 | 18.3 | 191 (100.0) |
| Year of diagnosis | ||||||
| 1992 | 0.4 | 20.7 | 35.6 | 26.4 | 16.8 | 570 (100.0) |
| 1993 | 0.6 | 20.6 | 36.0 | 25.4 | 17.4 | 505 (100.0) |
| 1994 | 1.1 | 13.3 | 31.8 | 36.3 | 17.4 | 534 (100.0) |
| 1995 | 0.9 | 11.4 | 31.9 | 38.6 | 17.2 | 570 (100.0) |
| 1996 | 1.6 | 8.8 | 33.8 | 40.6 | 15.2 | 579 (100.0) |
| 1997 | 0.4 | 10.1 | 32.9 | 40.7 | 16.0 | 764 (100.0) |
| 1998 | 0.1 | 10.1 | 34.3 | 44.6 | 11.0 | 826 (100.0) |
| 1999 | 0.1 | 6.2 | 32.2 | 49.3 | 12.2 | 908 (100.0) |
| Geographic areas | ||||||
| San Francisco | 0.3 | 10.6 | 32.2 | 48.2 | 8.7 | 311 (100.0) |
| Connecticut | 0.7 | 15.3 | 29.3 | 49.5 | 5.2 | 826 (100.0) |
| Detroit | 0.2 | 13.1 | 25.6 | 34.1 | 27.0 | 998 (100.0) |
| Hawaii | 0 | 10.0 | 37.5 | 48.8 | 3.8 | 80 (100.0) |
| Iowa | 0.2 | 6.8 | 49.0 | 32.6 | 11.5 | 619 (100.0) |
| New Mexico | 0 | 5.0 | 42.9 | 41.0 | 11.2 | 161 (100.0) |
| Seattle | 0.7 | 21.5 | 24.4 | 31.2 | 22.2 | 410 (100.0) |
| Utah | 0 | 10.6 | 66.6 | 19.2 | 3.6 | 302 (100.0) |
| Atlanta | 0 | 2.3 | 34.0 | 45.0 | 18.7 | 438 (100.0) |
| San Jose | 0.7 | 22.3 | 22.3 | 46.8 | 7.9 | 278 (100.0) |
| Los Angeles | 1.8 | 10.2 | 29.7 | 40.3 | 18.0 | 833 (100.0) |
| Total | 0.6 | 11.9 | 33.5 | 39.1 | 15.0 | 5256 (100.0) |