Article

People with stroke often have increased bone loss and fracture rate.
Increasing evidence has demonstrated a link between cardiovascular health and
bone loss in other patient populations. The study objectives were: (1)
to compare the bone density and geometry of the radius diaphysis on the left and
right sides in people with chronic stroke and people who were matched for age
(control participants) and (2) to examine the relationship between the bone
strength index at the hemiparetic radius diaphysis and vascular health in people
with chronic stroke. DESIGN: This was a case-control study. METHODS: The radius
diaphysis on both sides was scanned with peripheral quantitative computed
tomography in 65 participants with chronic stroke and 34 control participants.
Large-artery and small-artery elasticity indexes were evaluated with a
cardiovascular profiling system. RESULTS: The paretic radius diaphysis had
significantly lower values for cortical bone mineral density, cortical thickness,
cortical area, and the bone strength index but a larger marrow cavity area than
the nonparetic radius diaphysis in participants with chronic stroke, whereas no
bone measurement showed a significant side-to-side difference in control
participants. Multiple regression analyses showed that the large-artery
elasticity index and grip strength remained significantly associated with the
bone strength index at the hemiparetic radius diaphysis after controlling for
age, sex, time since stroke diagnosis, body mass index, and physical activity
(R(2)=.790). LIMITATIONS: This study was cross-sectional and could not establish
causality. The radius diaphysis is not the most common site of fracture after
stroke. CONCLUSIONS: Both the integrity of the vasculature and muscle strength
were significantly associated with the bone strength index at the hemiparetic
radius diaphysis in participants with chronic stroke. The results may be useful
in guiding rehabilitative programs for enhancing bone health in the paretic arm
after stroke.

Langue : ANGLAIS