Table 2.

Results of multivariable logistic regression models for the log odds of undergoing mastectomy as opposed to lumpectomy.

Variables	Odds Ratio	95%CI	P
Nationality
Saudi	0.483	0.305–0.766	0.002
Non- Saudi	2.069	1.306–3.278	0.002
Age Groups
<40 years	1.232	0.593–2.560	0.575
40–60 years	0.607	0.377–0.977	0.040
>60 years	1.672	0.977–2.860	0.061
NACT
Yes	1.616	1.008–2.593	0.046
No	0.619	0.386–0.993	0.046
Laterality
Right	1.042	0.669–1.622	0.856
Left	0.960	0.616–1.495	0.856
Tumor Focality
Unifocal	0.391	0.233–0.657	0.0001
Multifocal	2.557	1.522–4.295	0.0001
Tumor Centricity
Unicentric	0.241	0.124–0.467	0.0001
Multicentric	4.155	2.142–8.061	0.0001
Tumor Size (cm)	1.247	1.115–1.395	0.0001
Tumor Size Groups
<2 cm	0.623	0.384–1.012	0.056
2–5 cm	0.936	0.601–1.456	0.768
>5 cm	2.124	1.166–3.868	0.014
Tumor Stage
0	0.691	0.327–1.459	0.333
IA	0.259	0.126–0.529	0.0001
IIA	0.945	0.555–1.608	0.833
IIB	0.553	0.305–1.003	0.051
IIIA	2.753	1.360–5.575	0.005
IIIB	3.897	1.317–11.528	0.014
IIIC	2.060	0.900–4.714	0.087
Tumor Grade
I	1.017	0.569–1.818	0.955
II	0.980	0.620–1.549	0.933
III	0.994	0.632–1.565	0.981
Unknown	1.059	0.431–2.600	0.900
Positive Estrogen Receptor Status	1.422	0.878–2.302	0.163
Positive Progesterone Receptor Status	1.145	0.723–1.813	0.656
Positive HER2 Receptor Status	1.963	1.181–3.264	0.009
Triple Negative Tumors	2.109	1.195–3.723	0.010
Doing MRIa	0.729	0.426–1.247	0.240
MRIaFinding
Unilateral Malignant Findings	0.855	0.475–1.539	0.602
Bilateral Malignant Findings	1.283	0.607–2.709	0.514
Benign Findings	1.001	0.448–2.235	0.999

^aMRI = magnetic resonance imaging.