Table 3.
Usability testing participants’ sociodemographic characteristics (n=14).
| Characteristics | Total | NUa (n=7) | WRb (n=7) | ||||
| Age (years), mean (SD; range) | 50.0 (12.0; 27-66) | 56.6 (6.7; 45-66) | 42.7 (12.4; 27-65) | ||||
| Sex, n (%) | |||||||
|
|
Male | 11 (79) | 6 (86) | 5 (71) | |||
|
|
Female | 3 (21) | 1 (14) | 2 (29) | |||
| Ethnicity, n (%) | |||||||
|
|
Not Hispanic or Latino | 13 (93) | 7 (100) | 6 (86) | |||
|
|
Hispanic or Latino | 1 (7) | 0 (0) | 1 (14) | |||
| Race, n (%) | |||||||
|
|
White | 9 (64) | 5 (71) | 4 (57) | |||
|
|
Black or African American | 2 (14) | 1 (14) | 1 (14) | |||
|
|
Native Hawaiian or other Pacific Islander | 1 (7) | 1 (14) | 0 (0) | |||
|
|
Multiracial | 2 (14) | 0 (0) | 2 (29) | |||
| Marital status, n (%) | |||||||
|
|
Married or domestic partner or civil union | 12 (86) | 6 (86) | 6 (86) | |||
|
|
Separated or divorced | 1 (7) | 0 (0) | 1 (14) | |||
|
|
Never married or single | 1 (7) | 1 (14) | 0 (0) | |||
| Education, n (%) | |||||||
|
|
Some college | 5 (36) | 2 (29) | 3 (43) | |||
|
|
College graduate | 5 (36) | 2 (29) | 3 (43) | |||
|
|
Postgraduate degree | 4 (29) | 3 (43) | 1 (14) | |||
| Health literacy (adequate), n (%) | 13 (93) | 7 (100) | 6 (86) | ||||
| Employment status, n (%) | |||||||
|
|
Employed full time | 7 (50) | 3 (43) | 4 (57) | |||
|
|
Employed part time | 1 (7) | 1 (14) | 0 (0) | |||
|
|
Homemaker | 1 (7) | 0 (0) | 1 (14) | |||
|
|
Disabled | 1 (7) | 1 (14) | 0 (0) | |||
|
|
Retired | 4 (29) | 2 (29) | 2 (29) | |||
| Income (US $), n (%) | |||||||
|
|
<15,000 | 0 (0) | 0 (0) | 0 (0) | |||
|
|
Between 15,000 and 34,999 | 1 (7) | 1 (14) | 0 (0) | |||
|
|
Between 55,000 and 74,999 | 1 (7) | 1 (14) | 0 (0) | |||
|
|
Between 75,000 and 94,999 | 5 (36) | 1 (14) | 4 (57) | |||
|
|
>95,000 | 5 (36) | 3 (43) | 2 (29) | |||
|
|
Prefer not to answer | 2 (14) | 1 (14) | 1 (14) | |||
| Primary health insurance, n (%) | |||||||
|
|
Private | 4 (29) | 3 (43) | 1 (14) | |||
|
|
Tricare | 5 (36) | 0 (0) | 5 (71) | |||
|
|
Medicaid or Medicare | 4 (29) | 3 (43) | 1 (14) | |||
|
|
None | 1 (7) | 1 (14) | 0 (0) | |||
| Health status, n (%) | |||||||
|
|
Excellent | 5 (36) | 3 (43) | 2 (29) | |||
|
|
Very good | 5 (36) | 1 (14) | 4 (57) | |||
|
|
Good | 3 (21) | 3 (43) | 0 (0) | |||
|
|
Fair | 1 (7) | 0 (0) | 1 (14) | |||
| Dominant hand amputated, n (%) | |||||||
|
|
Yes | 12 (86) | 7 (100) | 5 (71) | |||
|
|
No | 2 (14) | 0 (0) | 2 (29) | |||
| Upper extremity amputated, n (%) | |||||||
|
|
Right | 7 (50) | 3 (43) | 4 (57) | |||
|
|
Left | 5 (36) | 2 (29) | 3 (43) | |||
|
|
Both | 2 (14) | 2 (29) | 0 (0) | |||
| Amputation type, n (%) | |||||||
|
|
Unilateral | 12 (86) | 5 (71) | 7 (100) | |||
|
|
Bilateral | 2 (14) | 2 (29) | 0 (0) | |||
| Amputation level, n (%) | |||||||
|
|
Below elbow | 7 (50) | 5 (71) | 2 (29) | |||
|
|
Above elbow | 6 (43) | 1 (14) | 5 (71) | |||
|
|
Below elbow and above elbow | 1 (7) | 1 (7) | 0 (0) | |||
| Current prosthesis typec, n (%) | |||||||
|
|
Mechanic | 8 (57) | 3 (43) | 5 (71) | |||
|
|
Myoelectric | 6 (43) | 4 (57) | 2 (29) | |||
|
|
None | 1 (7) | 0 (0) | 1 (14) | |||
| Time since the last amputation (years), n (%) | |||||||
|
|
<2 | 2 (14) | 1 (14) | 1 (14) | |||
|
|
2-8 | 2 (14) | 0 (0) | 2 (29) | |||
|
|
9-15 | 2 (14) | 1 (14) | 1 (14) | |||
|
|
16-25 | 4 (29) | 2 (29) | 2 (29) | |||
|
|
>25 | 4 (29) | 3 (43) | 1 (14) | |||
aNU: Northwestern University.
bWR: Walter Reed National Military Medical Center.
cPercentages do not add up to 100 as some participants used multiple prostheses.