Table 5.

Multivariable logistic regression of independent predictors of delay to surgery beyond 100 days

		95% Confidence Interval
Predictor	Odds Ratio	Lower	Upper	p-value
Age (per year)	0.97	0.95	0.99	0.005
Sex (female)	1.07	0.70	1.62	0.77
Race (reference: White)
Black	1.27	0.33	4.84	0.72
Year of diagnosis (per year)	0.99	0.93	1.05	0.72
CDCC score (reference: 0)
1	0.93	0.65	1.32	0.68
2+	1.71	0.96	3.06	0.07
Insurance status (reference: private)
Government	2.27	1.55	3.32	<0.001
None	1.33	0.27	6.55	0.72
Facility location (reference: metro)
Urban	1.08	0.68	1.71	0.75
Rural	1.49	0.59	3.78	0.40
Median income (reference: <$38,000)
$38000-$47999	0.85	0.51	1.43	9.55
$48000-$62999	0.72	0.41	1.28	0.27
>$63000	0.71	0.37	1.37	0.31
Education (reference: >=21% not high school grads)
13%-20.9%	1.39	0.79	2.47	0.25
7%-12.9%	1.46	0.80	2.66	0.22
<7%	1.12	0.56	2.27	0.74
Facility type (reference: non-academic)
Academic/Research Program	1.02	0.65	1.62	0.92
Distance to treatment center (per mile)	1.00	1.00	1.00	0.15
Facility geography (reference: New England)
Middle Atlantic (nj,ny,pa)	0.77	0.38	1.55	0.47
South Atlantic (dc,de,fl,ga,md,nc,sc,va,wv)	0.72	0.36	1.45	0.36
East North Central (il,in,mi,oh,wi)	0.99	0.51	1.92	0.97
East South Central (al,ky,ms,tn)	0.52	0.20	1.34	0.18
West North Central (ia,ks,mn,mo,nd,ne,sd)	0.41	0.18	0.96	0.04
West South Central (ar,la,ok,tx)	0.77	0.30	1.99	0.59
Mountain (az,co,id,mt,nm,nv,ut,wy)	0.39	0.19	1.30	0.13
Pacific (ak,ca,hi,or,wa)	1.05	0.50	2.21	0.89
Center volume (reference: Q1 ≤1 a year)
Q2 (>1-3)	1.39	0.51	3.77	0.51
Q3 (>3-8)	2.04	0.77	5.37	0.15
Q4 (>8)	2.64	0.98	7.08	0.05
Center of diagnosis vs. treatment (reference: same)
Diagnosis and treatment at different centers	1.63	1.14	2.31	0.007
Tumor size (per mm)	0.98	0.97	1.00	0.009