TABLE 2.

Receipt of surgery by patient and tumor characteristics

Characteristic (percentage of resected [R] and nonresected [NR] patients with missing data)	Percentage resected	Unadjusted OR (95% Cl)	P
Age, years
<50	96.5	1.0
50–59	97.3	1.29 (0.99–1.68)	0.060
60–69	96.4	0.97 (0.76–1.25)	0.819
70–79	95.7	0.81 (0.64–1.04)	0.100
≥80	92.6	0.45 (0.35–0.59)	<0.0001
Race
Caucasian	96.4	1.0
African American	94.9	0.69 (0.58–0.83)	<0.0001
Marital status (R 5.1%, NR 17.6%)
Married	97.3	1.0
Single	95.9	0.66 (0.48–0.89)	0.006
Separated or divorced	96.3	0.73 (0.54–0.98)	0.037
Widowed	95.2	0.55 (0.45–0.67)	<0.0001
Romano-Charlson comorbidity index (R 7.2%, NR 22.0%)
0	96.9	1.0
1	96.2	0.80 (0.62–1.05)	0.105
2+	94.4	0.55 (0.38–0.79)	0.001
Residency (R 4.6%, NR 11.5%)
Urban	97.2	1.0
Rural	94.5	0.49 (0.41–0.58)	<0.0001
Education, zip code level (R 6.6%, NR 14.6%)
High education	96.7	1.0
Low education	95.9	0.80 (0.67–0.97)	0.020
Income, zip code level (R 6.5%, NR 14.6%)
Not living in poverty	96.5	1.0
Living in poverty	96.1	0.89 (0.69–1.14)	0.354
Insurance status (R 5.1%, NR 12.7%)
Commercial	97.8	1.0
HMO	97.7	0.95 (0.60–1.49)	0.809
Medicare	95.4	0.46 (0.38–0.57)	<0.0001
Medicaid	93.2	0.30 (0.20–0.45)	<0.0001
Other	94.8	0.41 (0.24–0.70)	0.001
Self-pay	94.5	0.39 (0.27–0.56)	<0.0001
SEER summary stage
Localized or regional (direct extension only)	95.8	1.0
Regional (lymph node involvement or NOS)	96.7	1.28 (1.07–1.54)	0.008
Tumor location
Central	96.6	1.0
Upper inner quadrant	96.9	1.10 (0.68–1.76)	0.700
Lower inner quadrant	96.8	1.06 (0.62–1.82)	0.837
Upper outer quadrant	96.9	1.09 (0.74–1.61)	0.668
Lower outer quadrant	97.4	1.31 (0.76–2.25)	0.327
Overlapping lesion	97.4	1.29 (0.85–1.96)	0.229
NOS	92.1	0.41 (0.28–0.60)	<0.0001

SEER, Surveillance, Epidemiology, and End Results; HMO, health maintenance organization; NOS, not otherwise specified; OR, odds ratio; CI, confidence interval.