Table 1.

Select patient and facility characteristics of women with breast cancer in the NCDB (2004–2015), stratified by age group

	All patients (N = 1,201,252)	Ages ≤ 45 years (N = 156,240)	Ages ≥ 75 years (N = 210,095)	p value
Gender				< 0.001
Female	1,191,150 (99.2%)	155,463 (99.5%)	207,536 (98.8%)
Male	10,102 (0.8%)	777 (0.5%)	2559 (1.2%)
Race/ethnicity				< 0.001
Non-Hispanic White	908,990 (75.7%)	103,355 (66.2%)	172,366 (82%)
Non-Hispanic Black	126,573 (10.5%)	21,873 (14%)	15,774 (7.5%)
Hispanic	57,113 (4.8%)	13,279 (8.5%)	5721 (2.7%)
Other	44,001 (3.7%)	9485 (6.1%)	3992 (1.9%)
Charlson/Deyo Comorbidity Score				< 0.001
0	1,008,792 (84%)	145,622 (93.2%)	159,889 (76.1%)
1	156,501 (13%)	9535 (6.1%)	38,742 (18.4%)
≥ 2	35,959 (3%)	1083 (0.7%)	11,464 (5.5%)
Income level				< 0.001
< $48,000	424,193 (35.3%)	51,145 (32.7%)	78,913 (37.6%)
≥ $48,000	768,697 (64%)	103,838 (66.5%)	129,413 (61.6%)
Education level				< 0.001
≤ 87% high school grad rate	445,597 (37.1%)	58,044 (37.2%)	76,745 (36.5%)
> 87% high school grad rate	747,773 (62.2%)	96,989 (62.1%)	131,687 (62.7%)
Insurance status				< 0.001
Private	634,577 (52.8%)	123,753 (79.2%)	19,358 (9.2%)
Government	526,525 (43.8%)	23,941 (15.3%)	187,884 (89.4%)
Not insured	23,942 (2%)	5967 (3.8%)	657 (0.3%)
Facility type				< 0.001
Academic	362,684 (30.2%)	56,323 (36%)	51,418 (24.5%)
Integrated network	136,214 (11.3%)	18,142 (11.6%)	23,489 (11.2%)
Comprehensive	584,136 (48.6%)	69,111 (44.2%)	109,882 (52.3%)
Community	118,218 (9.8%)	12,664 (8.1%)	25,306 (12%)

Data presented as N (%) unless otherwise specified. Percentages may not add up to 100 due to rounding or missing values. p values represent the comparison between patients ≤ 45 years and those ≥ 75 years