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CS-PFP-10 VALIDITY IN TRANSFEMORAL AMPUTEES 187

Table 1. Description of CS-PFP-10 Tasks
Table 1. Description of CS-PFP-10 Tasks
Functional Domains
Task
Difficulty Task UBS LBS UBF BAL END
1. Pot carry 1 m Mass Time
Low
Difficulty 2. Don/Doff jacket Time Time
3. Vertical reach Distance
4. Pick up scarves from floor Time Time
5. Floor sweep Time Time
Moderate
Difficulty 6. Laundry: a) transfer clothes
washer to dryer, b) dryer to Time Time Time
basket
7. Transfer from standing to
long-sit on floor and back to Time Time
High standing
Difficulty 8. Stair ascent/descent Time Time
9. Carry groceries 70 m Mass Mass Time
10. 6-minute walk test Distance

Balance and coordination (BAL), endurance (END), lower body strength (LBS), upper body flexibility (UBF), and upper body strength
(UBS).
Balance and coordination (BAL), endurance (END), lower body strength (LBS), upper body flexibility
Level) (17). TFA subjects used their preferred pros- judgement of safety and comfort. Tasks are performed
(UBF), and upper body strength (UBS).
theses with an MPK system and an energy storing serially from low to high difficulty. The CS-PFP-10

and return prosthetic foot. Each participant had their tasks use time, distance, and weight to evaluate overall
prosthesis evaluated for proper fit, alignment, and physical functional performance and performance in
function by the study’s licensed prosthetist. The study five physiologic functional domains: UBS, UBF, LBS,
protocol was approved by the University of South BAL, and END. Raw data (time, distance, mass) are
Florida’s Institutional Review Board, and each study converted, via an algorithm within licensed scoring
participant provided written informed consent. software, into a continuously scaled score (0 to 100)
Study Design for a singular overall total performance score and five
This was a cross-sectional study to determine con- individual domain scores. The CS-PFP-10 requires
approximately 30 to 40 min to complete. Table 1 pro-
current validity (the extent of statistical correlation) vides a description of CS-PFP-10 tasks.
of the CS-PFP-10 and its specific physiologic domains
that involved the lower extremities (LBS, BAL, or Amputee Mobility Predictor (AMP)
END) in comparison to measures of comparable ADL The AMP is a 21-item test of functional mobility
tasks or physiologic measures that have established used to predict an LEA patient’s ability to ambulate
validity for use in persons with TFA. Participants and was shown to have moderate to strong concurrent
were assessed performing the CS-PFP-10, AMP, 75 m validity with the 6MWT and the Amputee Activ-
self-selected walking speed test (75 m SSWS), down ity Survey (2). Specific details of each item and test
stair walking time (DN stair time), and the limits of administration of the AMP have been described pre-
stability (LOS) balance test.
viously (2). The following is a synopsis of the mobility
CS-PFP-10 functions assessed by the AMP (2). Items 1 and 2
The CS-PFP-10 was administered using stan- test the ability to maintain sitting balance. Items 3
dardized procedures (i.e., certified test site and test through 7 test the ability to maintain balance while
administrators, script dialogue; all reported else- performing tasks of transferring from chair to chair
where) (4,18). The CS-PFP-10 consists of 10 ADL and standing unchallenged. Items 8 through 13 test
tasks performed at maximal effort within the person’s more challenging standing balance activities. Items