Table 1.

Characteristics of NABC patients with breast cancer (N = 4,639), San Francisco Bay Area, 1995 to 2008

Non-Hispanic whiteAfrican-AmericanHispanicAsian-AmericanTotal
n (%)n (%)n (%)n (%)Chi-square P-valuen (%)
Total patients1,0679881,6426724,369
Number of deaths
 All-cause27728025792906
 Breast cancer–specific157 (57)173 (62)162 (63)75 (82)567 (63)
Study<0.01
 NC-BCFR high risk448 (42)241 (24)337 (21)259 (39)1,285 (29)
 NC-BCFR sporadic99 (9)293 (30)365 (22)413 (62)1,170 (27)
 SFBCS520 (49)454 (46)940 (57)0 (0)1,914 (44)
Age at diagnosis (years)<0.01
 <3019 (2)11 (1)29 (2)14 (2)73 (2)
 30–3479 (7)32 (3)69 (4)48 (7)228 (5)
 35–3952 (5)53 (5)139 (9)55 (8)299 (7)
 40–44100 (9)121 (12)229 (14)115 (17)565 (13)
 45–49153 (14)162 (16)297 (18)127 (19)739 (17)
 50–54171 (16)180 (18)238 (15)119 (18)708 (16)
 55–59157 (15)142 (14)241 (14)106 (16)646 (15)
 60–64149 (14)152 (15)193 (12)88 (13)582 (13)
 65+187 (18)135 (14)207 (13)0 (0)529 (12)
AJCC stage<0.01
 I535 (50)398 (40)685 (42)291 (43)1,909 (44)
 II429 (40)449 (45)742 (45)319 (48)1,939 (44)
 III53 (5)80 (8)143 (9)32 (5)308 (7)
 IV17 (2)25 (3)24 (2)13 (2)79 (2)
 Unknown33 (3)36 (4)48 (3)17 (3)134 (3)
Nodal involvement<0.01
 No694 (65)576 (58)968 (59)397 (59)2,635 (60)
 Yes323 (30)363 (37)627 (38)255 (38)1,568 (36)
 Unknown50 (5)49 (5)47 (3)20 (3)166 (4)
Histology0.19
 Ductal839 (79)786 (80)1299 (79)551 (82)3,475 (80)
 Lobular151 (14)112 (11)212 (13)72 (11)547 (12)
 Other77 (7)90 (9)131 (8)49 (7)347 (8)
Histologic grade<0.01
 1192 (18)125 (13)243 (15)85 (13)645 (15)
 2423 (40)314 (32)592 (36)278 (41)1,607 (37)
 3 and 4324 (30)437 (44)654 (40)252 (38)1,667 (38)
 Unknown128 (12)112 (11)153 (9)57 (9)450 (10)
Estrogen and progesterone receptor status<0.01
 ER and/or PR negative160 (15)261 (26)378 (23)127 (19)926 (21)
 ER/PR positive796 (75)627 (64)1,122 (68)476 (71)3,021 (69)
 Unknown111 (10)100 (10)142 (9)69 (10)422 (10)
Surgerya<0.01
 None10 (1)40 (4)29 (2)12 (2)91 (2)
 Lumpectomy581 (55)592 (60)899 (55)317 (47)2,389 (55)
 Mastectomy475 (45)356 (36)714 (44)343 (51)1,888 (43)
Radiation<0.01
 No421 (40)398 (40)656 (40)322 (48)1,797 (41)
 Yes646 (61)590 (60)986 (60)350 (52)2,572 (59)
Chemotherapy<0.01
 No545 (51)453 (46)660 (40)248 (37)1,906 (44)
 Yes505 (47)519 (53)968 (59)417 (62)2,409 (55)
 Unknown17 (2)16 (2)14 (1)7 (1)54 (1)
Education<0.01
 <High school45 (4)143 (15)606 (40)51 (8)845 (19)
 High school degree or equivalent175 (16)194 (20)349 (21)64 (10)782 (18)
 Vocational/technical degree or some college374 (35)430 (44)436 (27)176 (26)1,416 (32)
 College degree/graduate school473 (44)221 (22)251 (15)381 (57)1,326 (30)
Neighborhood (block group) SESb<0.01
 Quintile 1-low SES9 (1)132 (13)98 (6)9 (1)248 (6)
 Quintile 230 (3)282 (29)240 (15)31 (5)583 (13)
 Quintile 3100 (9)207 (21)363 (22)101 (15)771 (18)
 Quintile 4257 (24)216 (22)434 (26)164 (24)1,071 (25)
 Quintile 5-high SES671 (63)151 (15)507 (31)367 (55)1,696 (39)
% Poverty (block group)<0.01
 0–0.049, high SES627 (59)202 (20)591 (36)350 (52)1,770 (41)
 0.05–0.09279 (26)191 (19)429 (26)199 (30)1,098 (25)
 0.1–0.19135 (13)317 (32)438 (27)94 (14)984 (23)
 ≥0.2, low SES26 (2)278 (28)184 (11)29 (4)517 (12)
Marital status<0.01
 Single/never married164 (15)282 (29)258 (16)98 (15)802 (18)
 Married681 (64)397 (40)1,018 (62)522 (78)2,618 (60)
 Separated/divorced114 (11)197 (20)207 (12)34 (5)552 (13)
 Widowed78 (7)86 (9)119 (7)10 (2)293 (7)
 Unknown30 (3)26 (3)40 (2)8 (1)104 (2)
History of benign breast disease<0.01
 No817 (77)794 (80)1,405 (86)576 (86)3,592 (82)
 Yes250 (23)192 (19)234 (14)96 (14)772 (18)
 Unknown0 (0)2 (0)3 (0)0 (0)5 (0)
Years since last full-term pregnancy<0.01
 Nulliparous272 (26)180 (18)234 (14)173 (26)859 (20)
 <225 (2)14 (1)21 (1)17 (3)77 (2)
 2–440 (4)26 (3)82 (5)47 (7)195 (5)
 5+726 (68)767 (78)1,303 (79)435 (65)3,231 (74)
 Unknown4 (0)1 (0)2 (0)0 (0)7 (0)
History of oral contraceptive use<0.01
 No285 (27)271 (27)535 (33)365 (54)1,456 (33)
 Yes730 (68)679 (69)1,052 (64)306 (46)2,767 (63)
 Unknown52 (5)38 (4)55 (3)1 (0)146 (3)
History of menopausal hormone therapy usec<0.01
 No540 (51)686 (70)1,126 (69)514 (77)2,866 (66)
 Past197 (19)201 (20)232 (14)90 (13)720 (17)
 Recent330 (31)101 (10)284 (17)68 (10)783 (18)
Alcohol consumption (g/day) in the year before diagnosis<0.01
 0380 (36)614 (62)1,045 (64)617 (92)2,656 (61)
 <5240 (23)125 (13)263 (16)21 (3)649 (15)
 5–9135 (13)97 (10)107 (7)12 (2)351 (8)
 10–14109 (10)48 (5)99 (6)9 (1)265 (6)
 ≥15196 (18)101 (10)124 (8)10 (2)431 (10)
 Unknown7 (1)3 (0)4 (0)3 (0)17 (0)
BMI (kg/m2) in year before diagnosis<0.01
 <25.0604 (57)262 (27)529 (32)471 (70)1,866 (43)
 25.0–29.9257 (24)312 (32)543 (33)146 (22)1,258 (29)
 ≥30.0197 (19)400 (41)549 (33)48 (7)1,194 (27)
 Unknown9 (1)14 (1)21 (1)7 (1)51 (1)
Recent recreational physical activity (hours/week)<0.01
 0, None260 (24)288 (29)686 (42)211 (31)1,445 (33)
 Quartiles 1 & 2330 (31)460 (47)476 (29)241 (36)1,507 (35)
 Quartile 3 & 4476 (45)240 (24)479 (29)218 (32)1,413 (32)
 Unknown1 (0)0 (0)1 (0)2 (0)4 (0)
Percent of race/ethnic-concordant patients with cancer in reporting hospital (%)<0.01
 <251 (0)646 (65)1456 (89)562 (84)2,665 (61)
 25–4970 (7)342 (35)186 (11)86 (13)684 (16)
 50–74472 (44)0 (0)0 (0)10 (2)482 (11)
 ≥75524 (49)0 (0)0 (0)14 (2)538 (12)
Percent of patients with cancer in highest SES quintile in reporting hospital (%)<0.01
 <25169 (16)317 (32)420 (26)124 (19)1,030 (24)
 25–49286 (27)491 (50)492 (30)249 (37)1,518 (35)
 50–74521 (49)163 (17)659 (40)251 (37)1,594 (37)
 ≥7591 (9)17 (2)71 (4)48 (7)227 (5)
  • aDistributions are based on known status.

  • bNeighborhood SES was measured using a composite measure of 7 Census indicator measures known as the Yost SES Index (29).

  • cPast = stopped before diagnosis; recent = stopped or continued to use at diagnosis.