Table 2.
Logistic Regression Modeling of Factors Associated With Receipt of Chemotherapy (n = 1,403)
| Factor | OR | 95% CI | P* |
|---|---|---|---|
| Age, years | 0.91 | 0.90 to 0.93 | < .001 |
| Comorbid conditions | .547 | ||
| None | Referent | ||
| One | 0.95 | 0.75 to 1.21 | |
| ≥ Two | 1.10 | 0.83 to 1.46 | |
| Stage | < .001 | ||
| I | Referent | ||
| II | 17.29 | 13.73 to 21.69 | |
| III | 52.29 | 33.67 to 81.22 | |
| Hormone receptor status | < .001 | ||
| ER and/or PR positive | Referent | ||
| ER negative/PR negative | 3.34 | 2.51 to 4.44 | |
| Histologic grade | < .001 | ||
| 1 | Referent | ||
| 2 | 2.91 | 2.24 to 3.78 | |
| 3 | 4.39 | 3.27 to 5.88 | |
| Income | .908 | ||
| < $20,000 | Referent | ||
| $20,000 to $69,000 | 0.94 | 0.67 to 1.31 | |
| ≥ $70,000 | 0.97 | 0.65 to 1.46 | |
| Education | .440 | ||
| Not high school graduate | Referent | ||
| High school graduate | 0.78 | 0.52 to 1.18 | |
| Some college | 1.17 | 0.77 to 1.77 | |
| College graduate | 0.73 | 0.47 to 1.14 | |
| Insurance status | < .001 | ||
| Medicare | Referent | ||
| Medicaid | 0.59 | 0.37 to 0.95 | |
| Other | 1.50 | 1.09 to 2.08 | |
| None | 1.77 | 0.98 to 3.19 | |
| Marital status | .246 | ||
| Married/partnered | Referent | ||
| Not married or partnered | 1.15 | 0.91 to 1.45 | |
| Employment status | .092 | ||
| Employed | Referent | ||
| Not employed | 1.23 | 0.97 to 1.57 | |
| Race/ethnicity | < .001 | ||
| Non-Hispanic white | Referent | ||
| Black | 0.83 | 0.64 to 1.08 | |
| Low-acculturated Hispanic | 2.10 | 1.28 to 3.44 | |
| High-acculturated Hispanic | 1.28 | 0.89 to 1.85 |
NOTE. Model is adjusted for site (registry).
Abbreviations: ER, estrogen receptor; OR, odds ratio; PR, progesterone receptor.
*
P values refer to tests for significance of the variables in the adjusted model.