Table 2. Factors Associated With Receipt of CRT in the 6900 Study Patients.
| Factor | Multivariate Analysis for Receiving CRT, Adjusted Odds Ratio (95% CI)a |
|---|---|
| Age, y | |
| ≤50 | 1 [Reference] |
| 51-60 | 1.18 (0.99-1.40) |
| 61-70 | 1.24 (1.04-1.49) |
| >70 | 1.38 (1.15-1.68) |
| Sex | |
| Female | 1 [Reference] |
| Male | 1.31 (1.16-1.49) |
| Year of diagnosis | |
| 2004-2006 | 1 [Reference] |
| 2007-2009 | 0.79 (0.68-0.91) |
| 2010-2012 | 0.48 (0.42-0.46) |
| Distance, miles | |
| <10 | 1 [Reference] |
| 10-19 | 0.63 (0.54-0.74) |
| 20-29 | 0.67 (0.55-0.81) |
| ≥30 | 0.49 (0.42-0.57) |
| Facility | |
| Academic | 1 [Reference] |
| Comprehensive community cancer program | 2.65 (2.33-3.01) |
| Community or integrated network cancer program | 2.54 (2.15-3.01) |
| Unknown | 1.04 (0.72-1.49) |
| Comorbidity index | |
| 1 | 1 [Reference] |
| 2 | 0.60 (0.51-0.71) |
| 3 | 0.81 (0.61-1.06) |
| Clinical T stage | |
| cT1-cT2 | 1 [Reference] |
| cT3-cT4a | 2.11 (1.85-2.41) |
| Clinical N stage | |
| cN0-cN1 | 1 [Reference] |
| cN2a-cN2c | 1.81 (1.62-2.04) |
| Site | |
| Oral tongue | 1.78 (1.58-2.01) |
| Other mouth | 1 [Reference] |
Abbreviation: CRT, chemoradiotherapy.
a
Multivariate model included age, sex, year of diagnosis, distance from facility, facility type, comorbidity index, clinical T stage, clinical N stage, and site.