Table 1.

Univariate Correlates of Radiation Receipt After Mastectomy

Characteristic	No. of Patients*	PMRT, %	P
T classification			<.001
T1	175	18.9
T2	122	38.5
T3	43	81.4
T4	32	78.1
N classification			<.001
No	193	17.1
N1	104	42.3
N2	45	86.7
N3	23	82.6
Nx	15	46.7
Tumor grade			.01
Low	59	23.7
Intermediate	130	32.3
High	154	46.0
Age, y			.003
<40	29	62.1
40-49	65	41.5
50-59	95	42.1
60-69	93	29.0
70+	62	24.2
No. of comorbidities			.02
0	193	43.0
≥1	203	32.0
Race			<.001
White	247	31.2
African American	103	39.9
Other (includes Asian,     Native American, other)	43	62.8
Insurance			.001
None	9	77.8
Medicaid	17	64.7
Medicare	124	28.2
Private	150	34.7
Other	85	44.7
Marital status			.28
Married or partnered	220	35.0
Not married	176	40.3
Education			.38
Some high school or less	50	48.0
High school graduate	77	36.4
Some college or technical school	142	35.2
College graduate and beyond	82	34.2
Income			.08
<30,000	139	42.5
30,000-69,999	100	29.0
70,000+	75	32.0
Received chemotherapy			<.001
Yes	225	51.6
No	118	9.3

PMRT indicates postmastectomy radiotherapy.

^*Numbers may sum to <396 due to missing values. The P values tested differences in the receipt of radiation for the selected variable.