Table 1.

Complete CBCSC cohort description by selected baseline model variables (N = 12,098)

Racial/ethnic group
VariableNon-Latina WhiteAfrican AmericanLatinaAsian AmericanTotal
Totala6,501 (54%)2,060 (17%)2,032 (17%)1,505 (12%)12,098 (100%)
AJCC stage
 Stage I3,416 (53%)827 (40%)911 (45%)729 (48%)5,883 (49%)
 Stage II2,486 (38%)923 (45%)868 (43%)629 (42%)4,906 (41%)
 Stage III312 (5%)143 (7%)145 (7%)90 (6%)690 (6%)
 Stage IV102 (2%)58 (3%)34 (2%)19 (1%)213 (2%)
 Unknown185 (3%)109 (5%)74 (4%)38 (3%)406 (3%)
Grade
 Grade I1,522 (23%)280 (14%)306 (15%)215 (14%)2,323 (19%)
 Grade II2,537 (39%)639 (31%)780 (38%)594 (39%)4,550 (38%)
 Grade III1,769 (27%)874 (42%)721 (35%)569 (38%)3,933 (33%)
 Unknown673 (10%)267 (13%)225 (11%)127 (8%)1,292 (11%)
Nodal positivity
 No positive nodes4,338 (67%)1,208 (59%)1,244 (61%)981 (65%)7,771 (64%)
 Positive nodes1,984 (31%)737 (36%)713 (35%)499 (33%)3,933 (33%)
 Unknown179 (3%)115 (6%)75 (4%)25 (2%)394 (3%)
Prior tumor
 No5,972 (92%)1,906 (93%)1,924 (95%)1,445 (96%)11,247 (93%)
 Yes529 (8%)154 (7%)108 (5%)60 (4%)851 (7%)
Neighborhood SES
 Lowest SES201 (3%)559 (27%)263 (13%)137 (9%)1,160 (10%)
 Lower-middle SES591 (9%)528 (26%)402 (20%)251 (17%)1,772 (15%)
 Middle SES1,119 (17%)420 (20%)430 (21%)288 (19%)2,257 (19%)
 Higher-middle SES1,717 (26%)338 (16%)447 (22%)376 (25%)2,878 (24%)
 Highest SES2,657 (41%)177 (9%)440 (22%)420 (28%)3,694 (31%)
 Unknown216 (3%)38 (2%)50 (2%)33 (2%)337 (3%)
Surgery type
 No surgery115 (2%)98 (5%)36 (2%)18 (1%)267 (2%)
 Mastectomy2,547 (39%)843 (41%)926 (46%)792 (53%)5,108 (42%)
 Breast-conserving surgery3,827 (59%)1,116 (54%)1,069 (53%)693 (46%)6,705 (55%)
 Other12 (0%)3 (0%)1 (0%)2 (0%)18 (0%)
Tumor size
 <1 cm1,135 (17%)235 (11%)300 (15%)267 (18%)1,937 (16%)
 <5 cm4,730 (73%)1,512 (73%)1,495 (74%)1,084 (72%)8,821 (73%)
 ≥5 cm346 (5%)176 (9%)120 (6%)92 (6%)734 (6%)
 Unknown290 (4%)137 (7%)117 (6%)62 (4%)606 (5%)
  • aPercentages in the “Total” row are row percentages, whereas other percentages are column percentages for the variable.