Table 1. Sample characteristics. Unless otherwise specified, all variables represent patient-reported information at the time of study participation. Six participants were included in both the usability testing and feasibility trial samples.

Variable	Statistic
	Usability testing(n=9)	Feasibility trial(n=7)
Age at study participation in years, mean (range)	27.8 (23-37)	25.1 (18-33)
Age at diagnosis in years, mean (range)	24.7 (19-34)	22.0 (17-32)
Gender, n (%)
Male	3 (33)	2 (29)
Female	5 (56)	5 (71)
Nonbinary	1 (11)	0 (0)
Race, n (%)
White	8 (89)	7 (100)
Native American or Alaskan Native	1 (11)	0 (0)
Hispanic or Latine, n (%)	6 (67)	3 (43)
Education, n (%)
Partial high school	0 (0)	1 (14)
High school graduate	1 (11)	1 (14)
Partial college or specialized training	5 (56)	3 (43)
College or university graduate	3 (33)	2 (29)
Relationship status, n (%)
Never married	4 (44)	4 (57)
Married or partnered	4 (44)	3 (43)
Divorced	1 (11)	0 (0)
Employment, n (%)a
Working full time	5 (56)	3 (43)
Working part time	0 (0)	2 (29)
Not employed	2 (22)	2 (29)
Student	1 (11)	0 (0)
Missing	1 (11)	0 (0)
Household income, n (%)
<US $10,000	1 (11)	1 (14)
US $10,000-US $39,999	3 (33)	2 (29)
US $40,000-US $59,999	2 (22)	1 (14)
US $60,000-US $100,000	3 (33)	2 (29)
>US $100,000	0 (0)	1 (14)
Cancer type at diagnosis, n (%)
Bone and soft tissue	1 (11)	2 (29)
Breast	3 (33)	2 (29)
Colorectal	1 (11)	0 (0)
Leukemia	2 (22)	1 (14)
Lymphoma	1 (11)	1 (14)
Thyroid and endocrine	1 (11)	1 (14)
Stage at diagnosis, n (%)
I	3 (33)	2 (29)
II	0 (0)	0 (0)
III	2 (22)	2 (29)
IV	1 (11)	1 (14)
Unknown or not reported	3 (33)	2 (29)

^aFor employment, participants were instructed to select the response that they felt most closely aligned with their employment status at the time of study participation.