Table 2.

Cox Proportional Hazard Model of Overall Survival Adjusting for Delay From Diagnosis to First Surgery Interval

	Interval From Diagnosis to First Surgery Treated as Category (≥42 vs <42 d)		Interval From Diagnosis to First Surgery Treated as Continuous Outcome (wk)
	HR	95% CI	HR	95% CI
Delay from diagnosis	1.34	0.73–2.46	1.04	1.00–1.08
Delay from diagnosis	1.31	0.72–2.41	1.04	1.00–1.08
Age at diagnosis (>75 vs ≤75 y)	1.51	0.87–2.61	1.62	0.93–2.82
Delay from diagnosis	1.38	0.75–2.53	1.05	1.01–1.09
Age at diagnosis (y)	1.02	0.99–1.05	1.03	1.00–1.05
Delay from diagnosis	1.34	0.73–2.46	1.04	1.00–1.09
Gender (male vs female)	1.15	0.68–1.94	1.22	0.72–2.08
Delay from diagnosis	1.33	0.72–2.44	1.04	1.00–1.08
Race (white vs nonwhite)	0.81	0.32–2.04	0.80	0.32–2.02
Delay from diagnosis	1.35	0.74–2.48	1.04	1.00–1.08
Smoking history (former vs current/unknown)	1.10	0.58–2.06	1.11	0.59–2.09
Smoking history (never vs current/unknown)	0.74	0.26–2.09	0.72	0.26–2.03
Delay from diagnosis	1.37	0.74–2.42	1.04	1.00–1.08
Insurance (yes vs no)	0.91	0.22–3.79	0.83	0.20–3.40
Delay from diagnosis	1.35	0.74–2.48	1.04	1.00–1.08
Residence (catchment vs Baltimore City)	0.95	0.34–2.68	0.91	0.32–2.55
Residence (noncatchment vs Baltimore City)	0.80	0.43–1.48	0.76	0.41–1.42
Delay from diagnosis	1.38	0.75–2.56	1.04	1.00–1.09
Diagnosis year (05–06 vs 03–04)	1.13	0.59–2.18	1.19	0.62–2.30
Diagnosis year (07–09 vs 03–04)	0.75	0.37–1.55	0.72	0.35–1.49
Delay from diagnosis	1.24	0.67–2.28	1.03	0.99–1.07
Stage (2B vs 1A–2A)	2.50	1.36–4.60	2.39	1.29–4.40
Delay from diagnosis	1.41	0.75–2.63	1.04	1.00–1.08
Marital status (married/ever vs single)	0.77	0.38–1.58	0.85	0.41–1.76
Delay from diagnosis	1.32	0.71–2.43	1.04	1.00–1.08
Tumor size (2–4 cm vs 0–2 cm)	4.11	1.24–13.66	3.94	1.19–13.11
Tumor size (>4 cm vs 0–2 cm)	4.82	1.42–16.42	4.79	1.41–16.31
Tumor size (unknown vs 0–2 cm)	5.19	1.43–18.82	5.40	1.48–19.63

CI = confidence interval; HR = hazard ratio.