Table 2.
Univariate and multivariate logistic regression for short‐course RT
| Univariate | Multivariate | |||
|---|---|---|---|---|
| Odds ratio | P‐value | Odds ratio | P‐value | |
| Age | ||||
| <70 y | Reference Group | Reference Group | ||
| ≥70 y | 1.56 (1.25‐1.94) | <.0001 | 1.58 (1.30‐2.18) | <.0001 |
| <75 y | Reference Group | Reference Group | ||
| ≥75 y | 1.67 (1.34‐2.08) | <.0001 | 1.70 (1.32‐2.20) | <.0001 |
| Race | ||||
| White | Reference Group | — | ||
| Black | 1.12 (0.84‐1.50) | .436 | ||
| Other | 1.44 (0.91‐2.29) | .119 | ||
| Year of diagnosis | ||||
| 2010 | Reference Group | Reference Group | ||
| 2011 | 1.09 (0.71‐1.66) | .692 | 1.06 (0.69‐1.64) | .786 |
| 2012 | 1.25 (0.84‐1.87) | .277 | 1.22 (0.81‐1.83) | .353 |
| 2013 | 1.32 (0.89‐1.94) | .165 | 1.30 (0.86‐1.94) | .192 |
| 2014 | 1.82 (1.26‐2.62) | .001 | 1.73 (1.19‐2.51) | .004 |
| Charlson‐Deyo Comorbidity | ||||
| 0 | Reference Group | — | ||
| 1 | 1.21 (0.91‐1.61) | .186 | ||
| >1 | 1.23 (0.82‐1.83) | .318 | ||
| Site of treatment | ||||
| Extremity | Reference Group | Reference Group | ||
| Spine | 0.46 (0.32‐0.66) | <.0001 | 0.49 (0.34‐0.71) | <.0001 |
| Ribs | 3.03 (1.41‐6.53) | .005 | 2.99 (1.36‐6.60) | .007 |
| Hip | 0.72 (0.47‐1.11) | .133 | 0.79 (0.51‐1.22) | .290 |
| Pelvic bones | 0.72 (0.46‐1.14) | .161 | 0.77 (0.49‐1.24) | .289 |
| Shoulder | 0.96 (0.47‐1.97) | .908 | 1.15 (0.55‐2.40) | .719 |
| Facility type | ||||
| Integrated Network Cancer Program | Reference Group | Reference Group | ||
| Academic/Research Program | 1.69 (1.17‐2.45) | .005 | 1.76 (1.20‐2.57) | .004 |
| Community Caner Program | 1.02 (0.63‐1.64) | .943 | 0.94 (0.58‐1.54) | .808 |
| Comprehensive Community Cancer Program | 0.89 (0.61‐1.29) | .529 | 0.88 (0.59‐1.29) | .505 |
| Insurance status | ||||
| Not insured | Reference Group | Reference Group | ||
| Medicaid | 1.54 (0.85‐2.65) | .157 | 1.45 (0.81‐2.61) | .207 |
| Medicare | 1.39 (0.87‐2.22) | .166 | 1.08 (0.66‐1.78) | .757 |
| Other government | 2.31 (1.03‐5.21) | .043 | 1.78 (0.77‐4.12) | .180 |
| Private | 0.94 (0.57‐1.56) | .817 | 0.89 (0.53‐1.49) | .652 |
| Unknown | 0.94 (0.34‐2.65) | .913 | 0.95 (0.33‐2.72) | .926 |
| Income | ||||
| <$38 000 | Reference Group | — | ||
| $38 000‐47 999 | 0.93 (0.67‐1.31) | .692 | ||
| $48 000‐62 999 | 1.07 (0.78‐1.48) | .667 | ||
| >$63 000 | 1.06 (0.77‐1.45) | .727 | ||
| Unknown | 0.85 (0.19‐3.82) | .834 | ||
| Distance | ||||
| 0‐5 miles | Reference Group | Reference Group | ||
| >5‐10 miles | 0.93 (0.69‐1.27) | .655 | 0.91 (0.66‐1.25) | .557 |
| >10‐15 miles | 1.34 (0.95‐1.90) | .095 | 1.31 (0.91‐1.87) | .143 |
| >15 miles | 1.38 (1.05‐1.81) | .019 | 1.38 (1.05‐1.83) | .023 |
Bold value represent statistical significance of the odds ratio between short‐course and long‐course radiation therapy (P < 0.05).