Adjuvant chemotherapy and survival in males aged 70 years or older with breast cancer: a population-based retrospective study

Table 2 Predictors of receipt of chemotherapy using multivariate logistic regression analysis

Variables		Hazard Ratio (95% Confidence Interval)	P ^c
Race	White	Reference
	Black	1.401 (0.878–2.236)	0.157
	Other ^a	1.164 (0.587–2.310)	0.663
Marital status	Married	Reference
	Not married ^b	0.635 (0.446–0.905)	0.012
	Missing	0.902 (0.417–1.952)	0.793
Histology	Ductal	Reference
Histology	Other ^d	0.895 (0.602–1.332)	0.585
Grade	Well	Reference
	Moderately	2.844 (1.262–6.409)	0.012
	Poorly/undifferentiated	3.773 (1.661–8.572)	0.002
	Missing	3.970 (1.581–9.969)	0.003
Tumor size	T1	Reference
	T2	1.526 (1.077–2.162)	0.017
	T3/4	1.194 (0.697–2.045)	0.517
	Missing	0.720 (0.182–2.846)	0.640
Nodal status	N0	Reference
	N1	2.889 (1.991–4.193)	< 0.001
	N2/3	6.158 (3.976–9.538)	< 0.001
	Missing	2.812 (0.723–10.939)	0.136
Estrogen Receptor	Positive	Reference
	Negative	0.889 (0.325–2.433)	0.819
	Missing	0.412 (0.104–1.628)	0.206
Progesterone Receptor	Positive	Reference
	Negative	1.428 (0.815–2.505)	0.213
	Missing	1.882 (0.518–6.835)	0.337
Surgery approach	Breast Conserving Surgery	Reference
	Mastectomy	2.947 (1.240–7.005)	0.014
	Missing	1.162 (0.448–3.012)	0.758
Radiation status	No	Reference
Radiation status	Yes	1.833 (1.313–2.558)	< 0.001

Note:
^a Other includes American Indian/Alaskan native and Asian/Pacific Islander and Unknown
^b Not married includes divorced, separated, single (never married), unmarried or domestic partner, and widowed
^c The P value was calculated by multivariate logistic regression analysis and bold type indicates significance
^d Other represents all pathological types other than invasive ductal breast cancer, including invasive lobular carcinoma, medullary carcinoma, mucinous carcinoma, intraductal papilloma, papillary carcinoma, tubular carcinoma, and so on

ISSN: 1471-2318