Association between regional phase angle and level of locomotion among older females requiring long-term care in a health facility.
Akira Kubo, Minami Sato, Akihiro Yakabi and 2 others
PMID 38952460WHAT IT FOUND
Regional phase angle in the lower limbs decreased significantly across three levels of mobility, from walking to assisted wheelchair use.
This suggests phase angle may reflect physical decline in immobile older women, offering a potential marker for monitoring muscle quality without requiring active effort.
Key findings
01Lower limb phase angle differed significantly among all three mobility groups, with the lowest values in those requiring assistance to move in a wheelchair.
02Upper limb phase angle decreased significantly only when wheelchair-driven locomotion became difficult, distinguishing assisted users from independent walkers.
03Trunk phase angle decreased significantly when walking became difficult, separating walkers from both independent and assisted wheelchair users.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The study included only older females, so results cannot be generalized to males or younger populations. It was a single-center, cross-sectional design, preventing causal inference between phase angle and locomotion. Sample sizes were small and unevenly distributed across groups (15 vs 29 vs 47). Height was estimated rather than measured, which may affect BMI and impedance calculations.
Declared interests
The authors declare no conflicts of interest.
The easy way to misread this
Do not interpret phase angle as a diagnostic tool or a target for intervention. This is an observational study showing an association between phase angle and mobility level in a specific group of very old women; it does not prove that improving phase angle will improve mobility, nor does it establish causality.