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. Author manuscript; available in PMC: 2014 Jul 1.
Published in final edited form as: J Geriatr Oncol. 2013 Jul;4(3):262–270. doi: 10.1016/j.jgo.2013.03.002

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