Medical Condition TTA, n (%) TFA, n (%) Total Participants 60 32 Head Injury/Traumatic Brain Injury 23 (38) 14 (44) Posttraumatic Stress Disorder 21 (35) 12 (38) Depression 12 (20) 7 (22) Heterotopic Ossification on Residual 16 (27) 20 (63) Limb(s) Medical Condition BLLA
, n (%) Total, n (%) Total Participants 26 118 Head Injury/Traumatic Brain Injury 16 (62) 53 (45) Posttraumatic Stress Disorder 11 (42) 44 (37) Depression 5 (19) 24 (20) Heterotopic Ossification on Residual 17 (65) 53 (45) Limb(s) BLLA
= bilateral lower-limb amputation, TFA = unilateral transfemoral amputation, TTA = unilateral transtibial amputation.
When compared with the AMP, it was found to have moderate to high correlation in people with lower-limb amputation  but has never been tested for those with BLLA.
Current measures of functional mobility in the amputee population share the same limitation; they have not been validated with BLLA primarily because a cohort with capabilities at higher functional levels is very difficult to recruit.
5 yr) with BLLA resulting from traumatic causes participated in the study (Table 1).
All participants with BLLA were retrospectively graded with a new scoring system (AMP-B).
Although literature examining predictive measures of functional mobility for those with BLLA is limited, our findings are consistent with previous studies that state the presence of at least one intact knee is key to maximizing function .
Separate models were generated for individuals with TTA, TFA, and BLLA.
There were significant differences in CHAMP score among SMs with TTA, TFA, and BLLA.
The results of the separate regression analyses for TTA, TFA, and BLLA are presented in subsequent paragraphs, followed by findings from an analysis of the contribution of prosthetic components.
Table 6 describes the stepwise regression analysis for the SMs with BLLA.