Table 2

The characteristics of traditional pathological parameters in the different age groups

Pathological parametersNo. of patients (%)X2 P values
All patients
(n=1042)
20 –40 years
(n=115)
41–60 years
(n=599)
≥61 years
(n=328)
In situ and invasive breast cancer
Tumour size23.320.010
 TX202 (19.4)39 (33.9)115 (19.2)48 (14.6)
 T1352 (33.7)34 (29.6)203 (33.9)114 (34.8)
 T2420 (40.3)38 (33.0)241 (40.2)141 (43.0)
 T332 (3.1)2 (1.7)19 (3.2)11 (3.3)
 T436 (3.5)2 (1.7)21 (3.5)13 (4.0)
Lymph nodes22.270.001
 NX382 (36.7)62 (53.9)206 (34.4)114 (34.8)
 N0408 (39.2)33 (28.7)230 (38.4)145 (44.2)
 N1250 (24.0)20 (17.4)162 (27.0)68 (20.7)
 N22 (0.2)0 (0.0)1 (0.2)1 (0.3)
Grade8.370.212
 Not detected399 (38.3)53 (46.1)217 (36.2)129 (39.3)
 High histological grade76 (7.3)9 (7.8)49 (8.2)18 (5.5)
 Intermediate histological grade478 (45.9)45 (39.1)286 (47.8)147 (44.8)
 Low histological grade89 (8.5)8 (7.0)47 (7.8)34 (10.4)
Invasive breast cancer
Auxillary staging15.120.004
 No description133 (14.2)20 (19.8)78 (14.4)35 (11.9)
 With auxiliary staging610 (65.0)49 (48.5)363 (67.0)198 (67.1)
 Without auxiliary staging195 (20.8)32 (31.7)101 (18.6)62 (21.0)
Margins9.630.055
 Not detected294 (31.4)44 (43.6)168 (31.1)82 (27.8)
 No residual cancer617 (65.8)56 (55.4)358 (66.2)203 (68.8)
 With residual cancer26 (2.8)1 (1.0)15 (2.8)10 (3.4)
Vascular tumour invasion7.470.102
 Not detected436 (46.5)54 (53.5)239 (44.2)143 (48.5)
 No403 (43.0)35 (34.7)238 (44.0)130 (44.1)
 Yes98 (10.5)12 (11.9)64 (11.8)22 (7.5)
Nerve infiltration4.190.380
 Not detected913 (97.4)98 (97.0))528 (97.6)287 (97.3)
 No14 (1.5)3 (3.0)8 (1.5)1 (1.0)
 Yes10 (1.1)0 (0.0)5 (0.9)5 (1.7)