Table 2.
Patient and Facility Characteristics Related to Not Receiving Treatment: Iowa Cancer Registry Data, 2004 to 2010
| Characteristic | Total Patient Cases | Bivariate Logistic Regression |
Multivariable Logistic Regression* |
||||
|---|---|---|---|---|---|---|---|
| OR | 95% CI | P | OR | 95% CI | P | ||
| Disease site | |||||||
| Breast | 14,898 | 0.185 | 0.17 to 0.20 | < .001 | 0.423 | 0.37 to 0.48 | < .001 |
| Cervix | 684 | 0.349 | 0.25 to 0.49 | < .001 | 1.440 | 0.93 to 2.24 | .1047 |
| Colon | 9,060 | 0.584 | 0.54 to 0.63 | < .001 | 0.591 | 0.53 to 0.66 | < .001 |
| Kidney and renal pelvis | 3,762 | 0.914 | 0.83 to 1.01 | .0768 | 1.209 | 1.06 to 1.38 | .0057 |
| Lung/bronchus | |||||||
| Small cell | 2,367 | 1.433 | 1.29 to 1.60 | < .001 | 1.675 | 1.45 to 1.93 | < .001 |
| Non–small cell | 11,518 | 1.483 | 1.41 to 1.60 | < .001 | 2.465 | 2.28 to 2.66 | < .001 |
| Melanoma | 3,859 | 0.461 | 0.41 to 0.52 | < .001 | 0.304 | 0.25 to 0.37 | < .001 |
| Non-Hodgkin lymphoma | |||||||
| Low grade | 1,419 | 2.095 | 1.85 to 2.40 | < .001 | 3.049 | 2.59 to 3.60 | < .001 |
| High grade | 2,034 | 1.107 | 0.98 to 1.26 | 0.1091 | 1.252 | 1.07 to 1.47 | .0058 |
| Prostate | 14,432 | 1.303 | 1.24 to 1.37 | < .001 | 0.953 | 0.86 to 1.05 | .3304 |
| Rectum | 2,349 | 0.724 | 0.63 to 0.84 | < .001 | 1.199 | 1.01 to 1.43 | .0429 |
| Other | 42,059 | Ref† | |||||
| Stage of disease at diagnosis | |||||||
| II | 25,141 | 2.070 | 1.93 to 2.22 | < .001 | 1.691 | 1.53 to 1.87 | < .001 |
| III | 14,402 | 2.059 | 1.90 to 2.23 | < .001 | 2.725 | 2.47 to 3.01 | < .001 |
| IV | 18,613 | 6.448 | 6.05 to 6.89 | < .001 | 7.964 | 7.31 to 8.68 | < .001 |
| Unknown | 19,242 | 6.216 | 5.84 to 6.62 | < .001 | 4.962 | 4.57 to 5.39 | < .001 |
| I | 31,043 | Ref† | |||||
| Age at diagnosis, years | 1.057 | 1.06 to 1.08 | .0122 | 1.053 | 1.05 to 1.06 | < .001 | |
| Sex‡ | |||||||
| Female | 52,532 | 1.053 | 1.01 to 1.10 | .0164 | 0.916 | 0.88 to 0.97 | .0014 |
| Male | 55,906 | Ref† | |||||
| Patient residence | |||||||
| Large rural city/town | 16,569 | 1.253 | 1.19 to 1.32 | < .001 | 1.193 | 1.11 to 1.28 | < .001 |
| Small rural town | 20,844 | 1.106 | 1.05 to 1.16 | < .001 | 0.809 | 0.75 to 0.87 | < .001 |
| Isolated small rural | 19,440 | 1.049 | 0.10 to 1.10 | .0594 | 0.750 | 0.70 to 0.81 | < .001 |
| Urban | 51,582 | Ref† | |||||
| Institution type | |||||||
| Comprehensive or academic cancer center | 47,914 | 1.410 | 1.32 to 1.51 | < .001 | 2.975 | 2.61 to 3.39 | < .001 |
| Community or integrated cancer center | 9131 | 2.135 | 1.96 to 2.33 | < .001 | 3.575 | 3.08 to 4.14 | < .001 |
| PPS hospital§ | 21,064 | 2.467 | 2.30 to 2.65 | < .001 | 4.450 | 3.90 to 5.08 | < .001 |
| Critical access hospital | 9788 | 3.851 | 3.56 to 4.16 | < .001 | 6.531 | 5.67 to 7.52 | < .001 |
| Clinic or physician office | 3233 | 26.576 | 24.19 to 29.20 | < .001 | 81.325 | 68.97 to 95.90 | < .001 |
| NCI cancer center | 17,311 | Ref† | |||||
| Oncologist seen‖ | |||||||
| Yes | 39,146 | 0.545 | 0.52 to 0.57 | < .001 | 0.415 | 0.39 to 0.44 | < .001 |
| No | 47,771 | Ref† | |||||
| Radiation therapist seen | |||||||
| Yes | 24,126 | 0.173 | 0.16 to 0.19 | < .001 | 0.165 | 0.15 to 0.18 | < .001 |
| No | 62,791 | Ref† | |||||
| Surgeon seen | |||||||
| Yes | 31,959 | 0.333 | 0.32 to 0.35 | < .001 | 0.455 | 0.43 to 0.47 | < .001 |
| No | 54,958 | Ref† | |||||
Abbreviations: NCI, National Cancer Institute; OR, odds ratio; PPS, prospective payment system; Ref, reference.
*
Multivariable logistic regression included all variables in the model.
†
Ref indicates the reference group within each bivariate and multivariable logistic regression analysis.
‡
Bivariate analysis of sex was conducted excluding predominately sex-specific cancers (ie, breast, cervical, prostate, and uterus cancers).
§
Indicates PPS hospitals that are not Commission on Cancer accredited.
‖
Oncologist includes medical, gynecologic, pediatric, and hematologic oncologists but does not include radiation oncologists.