Table 2. Adjusted Risk Predictors of Diagnosis by a Dermatologist.

Characteristic	Time to Surgery, wk >6 wk, RR (95% CI)	P Value
Patient
Age at diagnosis, y
<50	1 [Reference]
50-59	0.99 (0.95-1.03)	.60
60-69	1.05 (1.01-1.09)	.01
70-79	1.08 (1.03-1.12)	<.001
≥80	1.08 (1.03-1.13)	.003
Sex
Male	0.98 (0.95-1.00)	.06
Female	1 [Reference]
Race
Non-Hispanic white	1 [Reference]
Others	0.83 (0.74-0.94)	.002
Insurance type
Private	1 [Reference]
Medicare	0.94 (0.91-0.97)	<.001
Medicaid	0.72 (0.65-0.79)	<.001
Rural zip code
No	1 [Reference]
Yes	0.91 (0.89-0.93)	<.001
Year of diagnosis
2004	1 [Reference]
2005	0.97 (0.91-1.03)	.30
2006	1.01 (0.95-1.07)	.76
2007	1.04 (0.98-1.09)	.17
2008	1.06 (1.01-1.11)	.03
2009	1.06 (1.01-1.12)	.02
2010	1.05 (1.00-1.11)	.051
2011	1.00 (0.95-1.06)	.86
Charlson comorbidity index
0	1 [Reference]
≥1	0.92 (0.87-0.97)	.001
Tumor
Cancer anatomic location
Trunk	1 [Reference]
Head and neck	1.02 (0.99-1.05)	.28
Upper extremities	1.00 (0.97-1.03)	.93
Lower extremities	0.97 (0.93-1.00)	.06
Other skin, not otherwise specified	0.83 (0.67-1.04)	.11
American Joint Committee on Cancer stage
0	1 [Reference]
I	0.92 (0.90-0.94)	<.001
II	0.73 (0.68-0.78)	<.001
III	0.73 (0.67-0.81)	<.001
Unknown	0.85 (0.80-0.89)	<.001

Abbreviation: RR, risk ratio.