Table 1.

Patient and hospital characteristics

Characteristic	White (n = 112,306)	Black (n = 8,526)	P value
Age (y), mean (SD)	77.1 (7.2)	75.7 (7.1)	<.001
Female sex	62,055 (55.3%)	5,151 (60.4%)	<.001
Mean Charlson comorbidity index score (SD)	3.88 (2.15)	4.00 (2.18)	<.001
Stage
In situ	3,859 (3.4%)	368 (4.3%)	<.001
Localized	47,130 (42.0%)	3,247 (38.1%)
Regional	46,346 (41.3%)	3,467 (40.7%)
Distant	14,971 (13.3%)	1,444 (16.9%)
Hospital*
Rural	5,371 (12.4%)	142 (4.0%)	<.001
Teaching	23,309 (64.3%)	3,275 (76.9%)	<.001

SD = standard deviation.

^*Hospital data available only from 1996 to 2005.