Table 1.
Sample Characteristics and Adjusted Likelihood of Surgical Resection for Michigan Patients With Lung Cancer (N = 2,626)
| Characteristic | Medicare
|
Dually Eligible
|
P* | Surgical Resection
|
|||
|---|---|---|---|---|---|---|---|
| No. | % | No. | % | OR | 95% CI† | ||
| Medicare | 2,353 | NA | 1.0 | Referent | |||
| Dually eligible | NA | 273 | 0.50 | 0.38 to 0.67‡ | |||
| Age, years | < .001 | ||||||
| 66-69 | 494 | 20.99 | 87 | 31.87 | 1.0 | Referent | |
| 70-74 | 800 | 34.00 | 87 | 31.87 | 0.90 | 0.72 to 1.14 | |
| 75-79 | 610 | 25.92 | 59 | 21.61 | 0.65 | 0.51 to 0.83‡ | |
| ≥ 80 | 449 | 19.08 | 40 | 14.65 | 0.29 | 0.22 to 0.38‡ | |
| Race | < .001 | ||||||
| White | 2,159 | 91.76 | 208 | 76.19 | 1.0 | Referent | |
| African American | 194 | 8.24 | 65 | 23.81 | 0.88 | 0.65 to 1.19 | |
| Sex | < .001 | ||||||
| Male | 1,326 | 56.35 | 111 | 40.66 | 1.0 | Referent | |
| Female | 1,027 | 43.65 | 162 | 59.34 | 0.99 | 0.83 to 1.17 | |
| Comorbidity | < .001 | ||||||
| 0 | 1,287 | 54.70 | 114 | 41.76 | 1.0 | Referent | |
| 1 | 636 | 27.03 | 89 | 32.60 | 0.97 | 0.80 to 1.18 | |
| 2+ | 430 | 18.27 | 70 | 25.64 | 0.64 | 0.51 to 0.80‡ | |
| Census tract median annual income, $ | < .001 | ||||||
| < 35,000 | 1,345 | 57.16 | 222 | 81.32 | 0.80 | 0.67 to 0.98‡ | |
| ≥ 35,001 | 903 | 38.38 | 37 | 13.55 | 1.0 | Referent | |
| Missing | 105 | 4.46 | 14 | 5.13 | NA | ||
| Urban/rural | .4554 | ||||||
| Metropolitan | 1,816 | 77.18 | 196 | 71.79 | 1.0 | Referent | |
| Rural, adjacent to metropolitan | 11 | 0.47 | 1 | 0.37 | 1.18 | 0.35 to 3.99 | |
| Isolated rural | 42 | 1.78 | 5 | 1.83 | 1.79 | 0.91 to 3.53 | |
| Urban, not adjacent to metropolitan | 200 | 8.50 | 32 | 11.72 | 1.31 | 0.96 to 1.79 | |
| Urban, adjacent to metropolitan | 189 | 8.03 | 27 | 9.89 | 1.34 | 0.96 to 1.84 | |
| Missing | 95 | 4.04 | 12 | 4.40 | NA | ||
| Cancer stage | .1669 | ||||||
| I | 770 | 32.74 | 88 | 32.23 | 6.12 | 4.56 to 8.22‡ | |
| II | 1,264 | 53.72 | 143 | 52.38 | 3.29 | 2.49 to 4.34‡ | |
| IIIA | 319 | 13.56 | 42 | 15.38 | 1.0 | Referent | |
| Histology | .0949 | ||||||
| Adenocarcinomas | 928 | 39.44 | 112 | 10.58 | 1.0 | Referent | |
| Large-cell carcinomas | 172 | 7.31 | 90 | 8.84 | 0.48 | 0.34 to 0.67‡ | |
| Others/unknown | 306 | 13.00 | 25 | 12.69 | 0.25 | 0.19 to 0.33‡ | |
| Squamous cell carcinomas | 947 | 40.25 | 46 | 13.07 | 0.61 | 0.50 to 0.74‡ | |
| Resection | 1,238 | 52.61 | 98 | 35.90 | < .001 | ||
Abbreviations: OR, odds ratio; NA, not applicable.
*
Statistical significance determined by the two-sided χ2 test.
†
Statistical significance is determined by dividing the maximum likelihood coefficient by its standard error (Z) with two-tailed, statistical significance level set at P > Z.
‡
Statistically significant at P < .05.