| | |
Control (n = 1785)
|
Chemotherapy (n = 1785)
|
Statistical value
|
P
|
bias
|
t-test for bias
|
P
|
|---|
|
Age (years)
|
< 40
|
37 (2.07%)
|
47 (2.63%)
|
χ2 = 15.831
|
0.003
|
−11.6
|
−3.48
|
0.001
|
|
40–49
|
319 (17.87%)
|
392 (21.96%)
|
|
50–59
|
588 (32.94%)
|
605 (33.89%)
|
|
60–69
|
646 (36.19%)
|
557 (31.20%)
|
|
70–79
|
195 (10.92%)
|
184 (10.31%)
|
|
Race
|
Black
|
162 (9.08%)
|
174 (9.75%)
|
χ2 = 0.170
|
0.919
|
−3.7
|
−1.08
|
0.280
|
|
White
|
1493 (83.64%)
|
1495 (83.75%)
|
|
Other
|
130 (7.28%)
|
116 (6.50%)
|
|
Tumor
|
Ib
|
389 (21.79%)
|
374 (20.95%)
|
χ2 = 0.375
|
0.540
|
1.9
|
0.61
|
0.540
|
|
Ic
|
1396 (78.21%)
|
1411 (79.05%)
|
|
LN
|
N0
|
907 (50.81%)
|
895 (50.14%)
|
χ2 = 0.161
|
0.688
|
1.6
|
0.40
|
0.688
|
|
N1
|
878 (49.19%)
|
890 (49.86%)
|
|
Grade
|
I
|
450 (25.21%)
|
430 (24.09%)
|
z = −0.762
|
0.446
|
2.5
|
0.75
|
0.456
|
|
II
|
1173 (65.71%)
|
1188 (66.55%)
|
|
III
|
162 (9.08%)
|
167 (9.36%)
|
|
Radiotherapy
|
No
|
938 (52.55%)
|
883 (49.47%)
|
χ2 = 3.391
|
0.066
|
6.2
|
1.84
|
0.066
|
|
Yes
|
847 (47.45%)
|
902 (50.53%)
|
|
Surgery
|
No surgery
|
34 (1.90%)
|
36 (2.02%)
|
χ2 = 3.392
|
0.183
|
5.5
|
1.59
|
0.112
|
|
BCS
|
897 (50.25%)
|
842 (47.17%)
|
|
Mastectomy
|
854 (47.84%)
|
907 (50.81%)
|
