Table 3.
Multivariate analysis of surgery vs. non-surgery.
| Patient Characteristics | OR | 95% CI | p-value | |
|---|---|---|---|---|
| SEER region (ref.= Connecticut and New Jersey) |
Detroit | 0.98 | (0.86 – 1.11) | 0.7116 |
| Hawaii | 1.06 | (0.77 – 1.45) | 0.7178 | |
| Atlanta and Rural Georgia |
0.94 | (0.78 – 1.12) | 0.4739 | |
| San Francisco, San Jose, LA and Greater California |
0.86** | (0.77 – 0.95) | 0.0046 | |
| Louisiana | 0.70** | (0.59 – 0.84) | <.0001 | |
| Cancer site (ref.= Oral Cavity) | Hypopharynx + Larynx | 0.27** | (0.25 – 0.30) | <.0001 |
| Tonsil + Oropharynx | 0.19** | (0.16 – 0.23) | <.0001 | |
| Salivary Gland, Nasopharynx + Middle Ear |
0.62** | (0.54 – 0.72) | <.0001 | |
| Diagnosis era (ref.= 2002– 2007) |
1997–2001 | 1.38** | (1.25 – 1.52) | <.0001 |
| 1992–1996 | 1.40** | (1.26 – 1.56) | <.0001 | |
| Historic stage A (ref.= In Situ and localized) |
Regional | 0.73** | (0.67 – 0.80) | <.0001 |
| Locally advanced | 0.99 | (0.83 – 1.18) | 0.9184 | |
| Unknown/Unstaged | 0.54** | (0.45 – 0.65) | <.0001 | |
| Charlson comorbidity index (ref.= 0) |
1+ | 0.99 | (0.91 – 1.08) | 0.8588 |
| Sex (ref.= Male) | Female | 1.23** | (1.12 – 1.35) | <.0001 |
| Race (ref.= Caucasian American) |
Non-Caucasian American | 0.93 | (0.82 – 1.07) | 0.3290 |
| Age at diagnosis | 1.00 | (0.99 – 1.00) | 0.3659 | |
| Marital status (ref.= Married) | Unmarried or Unknown |
1.01 | (0.93 – 1.10) | 0.8038 |
| Dual eligibility for Medicare/Medicaid (ref.= No) |
Yes | 0.96 | (0.85 – 1.09) | 0.5564 |
| Percent of high school graduate based on 2000 census data (ref. = Quartile 4: <25%) |
Quartile 1: >=75% | 0.99 | (0.87 – 1.12) | 0.8343 |
| Quartile 2: 50%–<75% | 1.01 | (0.90 – 1.14) | 0.8232 | |
| Quartile 3: 25%–<50% | 1.01 | (0.90 – 1.13) | 0.9015 | |
| Cooperative group affiliated | 0.99 | (0.90 – 1.08) | 0.8188 | |
| NCI cancer center designated | 1.25 | (0.97 – 1.62) | 0.0856 | |
| Medical school affiliation | 0.95 | (0.86 – 1.04) | 0.2335 | |