Table 4: pathologic findings in undertreated and properly treated aged ≥71 years.

Pathologic findingFull treatmentUndertreated value

Histopathology
 Infiltrating ductal149 (80%)114 (60%)<0.001
 Infiltrating lobular18 (10%)25 (13%)
 Ductal carcinoma in situ15 (8%)51 (27%)
 Unknown4 (2.2%)0 (0%)
Tumor differentiation
 Well26 (14%)35 (18%)<0.001
 Moderately91 (49%)113 (59%)
 Poorly57 (31%)24 (13%)
 Unknown12 (6.5%)18 (9.5%)
Tumor size (cm)*
 Median1.41.00.003
 0–2128 (69%)146 (77%)0.169
 2.1–541 (22%)32 (17%)
 >5.18 (4.3%)4 (2.1%)
 Unknown9 (4.8%)8 (4.2%)
Involved nodes
 Mean1.10.50.021
 0119 (75%)80 (81%)0.103
 1–319 (12%)14 (14%)
 4+ 21 (13%)5 (5%)
Estrogen receptor positive133/162 (82%)140/155 (90%)0.034
Final margin: close/involved19/166 (11%)23/175 (13%)
Examined nodes (mean)83<0.001
Axillary node dissections153/167 (92%)90/139 (65%)<0.001
Surgery
 Breast conservation151 (81%)167 (88%)0.091
 Mastectomy34 (18%)23 (12%)
 Unknown1 (0.5%)0 (0%)
Postoperative chemotherapy43/184 (23%)5/190 (3%)<0.001
Tamoxifen142/181 (78%)98/183 (54%)<0.001
Radiation therapy 155/184 (84%)29/89 (33%)<0.001

Data are presented as or (%).
*Size of invasive component.
Invasive tumors.