Table 4. Logistic Regression Models of Radiation Therapy Underascertainment.
Los Angeles | Detroit | |||||||
---|---|---|---|---|---|---|---|---|
Odds Ratio | 95% Confidence Interval | P-value* | Odds Ratio | 95% Confidence Interval | P-value* | |||
Stage | 0.008 | 0.026 | ||||||
0 | 1.00 | 1.00 | ||||||
I | 0.82 | 0.64 | 1.03 | 0.67 | 0.35 | 1.28 | ||
II | 1.32 | 0.94 | 1.83 | 0.69 | 0.30 | 1.56 | ||
III | 0.76 | 0.49 | 1.21 | 0.26 | 0.09 | 0.70 | ||
Age | <0.001 | 0.36 | ||||||
<50 | 3.01 | 2.09 | 4.31 | 1.34 | 0.54 | 3.30 | ||
50-64 | 1.91 | 1.38 | 2.66 | 0.95 | 0.42 | 2.16 | ||
65+ | 1.00 | 1.00 | ||||||
Race | 0.14 | 0.13 | ||||||
White | 1.00 | 1.00 | ||||||
Black | 0.84 | 0.63 | 1.12 | 0.57 | 0.32 | 1.04 | ||
Hispanic | 0.78 | 0.61 | 0.99 | |||||
Other | 0.59 | 0.2 | 1.71 | |||||
Income | <0.001 | 0.050 | ||||||
<$20,000 | 1.12 | 0.79 | 1.60 | 1.15 | 0.48 | 2.71 | ||
$20,000-$69,999 | 1.66 | 1.31 | 2.11 | 1.96 | 1.19 | 3.24 | ||
$70,000+ | 1.00 | 1.00 | ||||||
Unknown | 1.02 | 0.76 | 1.37 | 1.42 | 0.72 | 2.78 | ||
Insurance | <0.001 | 0.87 | ||||||
None | 1.94 | 1.23 | 3.05 | <0.001 | <0.001 | >999 | ||
Medicaid | 1.26 | 0.86 | 1.87 | 0.82 | 0.31 | 2.17 | ||
Medicare | 2.19 | 1.60 | 3.00 | 0.70 | 0.30 | 1.67 | ||
Other | 1.00 | 1.00 | ||||||
Surgery Type | <0.001 | <0.001 | ||||||
Breast conservation | 1.00 | 1.00 | ||||||
Mastectomy | 2.07 | 1.50 | 2.85 | 4.93 | 2.84 | 8.57 | ||
Chemotherapy Receipt | <0.001 | 0.045 | ||||||
Yes | 1.84 | 1.43 | 2.37 | 1.86 | 1.02 | 3.41 | ||
No | 1.00 | 1.00 | ||||||
Delay Initiating RT | <0.001 | 0.15 | ||||||
Yes | 1.93 | 1.52 | 2.44 | 0.66 | 0.38 | 1.16 | ||
No | 1.00 | 1.00 | ||||||
Diagnosed at ACoS Accredited Hospital | <0.001 | <0.001 | ||||||
Yes | 1.00 | 1.00 | ||||||
No | 1.30 | 1.10 | 1.55 | 2.05 | 1.40 | 3.00 |
P values for group variables are reported from Wald tests; standard errors were adjusted for hospital clustering.
There were too few Hispanic patients in Detroit to support a separate category. Thus, Hispanics in Detroit were included in the “other” race category.