Exhibit 1. Study participant characteristics by income group.

Study participant characteristics by income group

Source: Authors’ analysis of data from the Breast Cancer and the Workforce study

	Low-income (<200% FPL) n=85	Middle-income (200–400% FPL) n=67	High-income (>400% FPL) n=115	p-value
	%	%	%
Characteristic
Age (mean, range)	50.3 27.7–64.9	51.6 32.3–64.6	47.3 24.9–64.5	0.004
Race/ethnicity
Black	16.5%	15.4%	20.9%	<0.001
Chinese	20.0	13.4	20.9
Korean	9.4	11.9	8.7
Latina	51.8	29.9	16.5
Non-Latina white	2.4	19.4	33.0
Foreign borna	83.5%	58.2%	41.2%	<0.001
Less-acculturated	74.1%	46.3%	18.3%	<0.001
Single-income household	76.5%	52.2%	40.9%	<0.001
Married or long-term partnera	51.8%	56.7%	69.9%	0.026
More than high-school educationa,b	48.8%	71.6%	92.2%	<0.001
Job typea
Managerial or professional specialty	9.5%	37.9%	74.8%	<0.001
Office or sales	22.6	25.8	14.8
Transportation, production, service	67.9	36.4	10.4
Number of employees in workplacea
Fewer than 15	42.5%	25.0%	17.7%	0.004
15–49	7.5	9.4	8.0
50 or more	50.0	65.6	74.3
Salaried earningsa	30.1%	37.9%	71.4%	<0.001
Job tenure >2 yearsa	71.3%	91.0%	87.8%	0.001
Health insurance
Employer-sponsored	28.2%	61.2%	77.4%	<0.001
Private, other	11.8	13.4	17.4
Public or no insurance	60.0	25.4	5.2
Employer was accommodatinga	45.1%	59.7%	67.5%	0.007
Stage II or III breast cancer	56.5%	55.2%	56.5%	0.986
Mastectomy	45.9%	49.3%	48.7%	0.897
Axillary dissection	34.1%	31.3%	34.8%	0.890
Received chemotherapya	84.7%	83.6%	87.7%	0.707
Received radiationa	74.1%	70.2%	75.4%	0.733
Number of comorbid conditions (≥1)	30.6%	22.4%	20.0%	0.209

Notes:

^aData missing for >=1 participant. Percentages calculated over complete data.

^bMore than high school education could include technical/vocational school, Associate’s Degree, or some or all of a Bachelor’s Degree.