Performance-based outcome measures are associated with cadence variability during community ambulation among individuals with a transtibial amputation.

This was an association study, not a treatment trial, so it cannot show that faster clinical test performance causes better community cadence variability. The sample was limited to community-dwelling, established prosthesis users, predominantly male, and mostly K3-level, so it says little about a more heterogeneous lower-limb loss population. Eight participants were excluded for invalid FitBit data, and outliers were removed, leaving 38 or 39 analysed. FitBit One step counts were validated in laboratory walking and may count fewer steps during free-living walking, especially at slower speeds. K-levels were assigned by prosthetists without a dictated process, so the mobility groups may reflect subjective clinical judgement. No cut-points were established for the clinical tests or for cadence variability, so individual scores cannot be read as high or low without further evidence.

Do not read these associations as proof that faster clinical walking tests cause higher cadence variability or guarantee K-level reimbursement. The study tested associations, K-levels were subjectively assigned, and no test cut-points were established.