Table 1.

Characteristics of breast cancer cases by joint ER and PR status

Unknown receptor status
Known receptor status
ERPR
ER+PR
ERPR+
ER+PR+
n (%)*n (%) *n (%)n (%)n (%)n (%)
789 (30)1,854 (70)332 (18)286 (15)71 (4)1165 (63)
Age at diagnosis (y)
    50-5464 (24)199 (76)50 (25)22 (11)16 (8)111 (56)
    55-59182 (30)416 (70)80 (19)59 (14)15 (4)262 (63)
    60-64160 (29)388 (71)68 (18)53 (14)13 (3)254 (65)
    65-69204 (31)463 (69)74 (16)76 (16)15 (3)298 (64)
    70-74179 (32)388 (68)60 (15)76 (20)12 (3)240 (62)
    P values, χ20.290.0033
Tumor size (mm)
    ≤10387 (54)334 (46)52 (16)43 (13)10 (3)229 (69)
    11-20264 (23)881 (77)129 (15)143 (16)37 (4)572 (65)
    21-50109 (15)577 (84)129 (22)89 (15)20 (3)339 (59)
    >5013 (19)55 (81)22 (40)7 (13)3 (5)23 (42)
    Missing1670412
    P values, χ2<0.0001<0.0001
Involved lymph nodes
    0588 (34)1,149 (66)189 (16)170 (15)42 (4)748 (65)
    1-3118 (22)425 (78)75 (18)68 (16)15 (4)267 (63)
    >338 (14)231 (86)61 (26)33 (14)14 (6)123 (53)
    Missing4549715027
    P values, χ2<0.00010.0054
Grade, differentiation
    Well100 (37)170 (63)13 (8)20 (12)7 (4)130 (76)
    Moderate171 (23)565 (77)67 (12)80 (14)15 (3)403 (71)
    Poor164 (22)596 (78)166 (28)95 (16)22 (4)313 (53)
    Missing354523869127319
    P values, χ2<0.0001<0.0001
Histology
    Ductal548 (29)1,340 (71)256 (19)202 (15)46 (3)836 (62)
    Lobular77 (25)231 (75)19 (8)41 (18)10 (4)161 (70)
    Other140 (34)271 (66)53 (20)41 (15)14 (5)163 (60)
    Missing24124215
    P values, χ20.0260.0048
Screening detection
    Yes496 (33)990 (67)135 (14)152 (15)41 (4)662 (67)
    No268 (24)854 (76)194 (23)131 (15)30 (4)499 (58)
    Missing25103304
    P values, χ2<0.0001<0.0001
Socioeconomic status
    Low421 (32)907 (68)158 (17)135 (15)38 (4)576 (64)
    High362 (28)936 (72)172 (18)148 (16)33 (4)583 (62)
    Missing6112306
    P values, χ20.0330.77
  • * Denominator includes all cases.

  • Denominator includes only receptor-defined cases.

  • Low level includes blue-collar workers and low-level white-collar workers, whereas high level includes all other categories.