Table 2.

Distribution of the breast cancer stage at diagnosis and primary treatment of the case subjects

All cases (n = 755)Screen-detected cases (n = 225, 29.8%)Interval cases (n = 259, 34.3%)Nonparticipant casesa (n = 271, 35.9%)
n (%)%%%
Stageb
 0–I133 (17.6)34.210.810.3
 IIA189 (25.0)32.429.015.1
 IIB178 (23.6)20.429.720.3
 IIIA36 (4.8)2.26.25.5
 IIIB61 (8.1)1.85.815.5
 IV131 (17.4)5.315.129.5
 Unknown27 (3.6)3.63.53.7
Therapy
 Breast-conserving surgery221 (29.3)45.327.018.1
 Mastectomy333 (44.1)47.150.635.4
 Primary radiotherapy2 (0.3)00.40.4
 Chemotherapy103 (13.6)3.613.921.8
 Hormonal therapy58 (7.7)0.94.616.2
 Other/unknownc38 (5.0)3.13.58.1
  • aCancer detection in women who never attended screening.

  • bStage based on pathologic TNM classification; in case of missing, clinical TNM staging was used instead.

  • cOther includes metastasectomy and palliation.