Table 2.

Percent (number) of participants with specified exposure, by stage of cancer at diagnosis

OverallStage of cancer at diagnosis*
(n = 631)In situ (n = 84)I (n = 182)IIa (n = 102)IIb (n = 45)III/IV (n = 28)DK/Unk* (n = 166)
Any radiation65.8 (415)53.6 (45)78.0 (142)68.6 (70)77.8 (35)64.3 (18)53.0 (88)
    Among those with radiation:
    %Breast/chest wall only80.2 (333)100.0 (45)99.3 (141)77.1 (54)42.9 (15)11.1 (2)71.6 (63)
    %Breast/chest wall + supraclavicular field9.6 (40)0.0 (0)0.7 (1)11.4 (8)22.9 (8)44.4 (8)15.9 (14)
    %Breast/chest wall + supraclavicular field + full axilla10.1 (42)0.0 (0)0.0 (0)11.4 (8)34.3 (12)44.4 (8)12.5 (11)
Any chemotherapy43.6 (275)1.2 (1)27.5 (50)80.4 (82)84.4 (38)78.6 (22)49.4 (82)
    Among those with chemotherapy:
    % with anthracycline80.7 (222)100.0 (1)86.0 (43)85.4 (70)94.7 (36)86.4 (19)64.6 (53)
Any tamoxifen63.5 (401)46.4 (39)63.7 (116)73.5 (75)71.1 (32)57.1 (16)65.1 (108)
Any lymph node surgery74.5 (470)13.1 (11)96.7 (176)99.0 (101)97.8 (44)85.7 (24)68.7 (114)
    Among those with any lymph node surgery:
    %Sentinel + axillary31.1 (146)9.1 (1)34.1 (60)35.6 (36)43.2 (19)25.0 (6)21.1 (24)
    %Axillary only50.2 (236)63.6 (7)36.4 (64)53.5 (54)54.5 (24)66.7 (16)62.3 (71)
    %Sentinel only16.6 (78)18.2 (2)29.5 (52)10.9 (11)0.0 (0)4.2 (1)10.5 (12)
Any breast surgery
    Among those with any breast surgery:
    %Mastectomy30.1 (190)19.0 (16)17.0 (31)31.4 (32)40.0 (18)64.3 (18)44.0 (73)
        % with concurrent reconstruction24.2 (46)37.5 (6)32.3 (10)31.3 (10)27.8 (5)22.2 (4)15.1 (11)
    %Breast conservation69.4 (438)81.0 (68)82.4 (150)68.6 (70)60.0 (27)35.7 (10)54.8 (91)
Any breast/axilla infection5.5 (35)3.6 (3)6.6 (12)8.8 (9)6.7 (3)3.6 (1)4.2 (7)
  • *See footnote § in Table 1.

  • This participant first received chemotherapy in the third year after diagnosis. Of the 275 participants given chemotherapy, 271 began chemotherapy within the first year of diagnosis.

  • Virtually 100% of participants had breast surgery.