https://link.springer.com/epdf/10.1007/s11657-017-0414-4?author_access_token=llxbJoqMAwbJR_-wSasLove4RwlQNchNByi7wbcMAY5Yc2JLyKIO9HuvO8n_m0d9g6X67dQIlftqkWNr1ccluDEouY0oDjLLG90erJn5jg22kDJNXKRySBJhFYdfYJU6QZ2RCBKtJPtQgz-bZyDb4g%3D%3D
Karen Borschmann
1,2
&
Sandra Iuliano
3,4
&
Ali Ghasem-Zadeh
3,4
&
Leonid Churilov
2
&
Marco Y. C. Pang
5
&
Julie Bernhardt
1,2
Received: 24 May 2017 /Accepted: 18 December 2017
#
The Author(s) 2018. This article is an open access publication
Abstract
Purpose: Bone fragility contributes to increased fracture risk, but little is known about the emergence of post-stroke bone loss. We investigated skeletal changes and relationships with physical activity, stroke severity, motor control and lean mass within 6 months of stroke.
Methods
This is a prospective observational study. Participants were non-diabetic but unable to walk within 2 weeks of first stroke. Distal tibial volumetric bone mineral density (vBMD, primary outcome), bone geometry and microstructure (high-resolution peripheral quantitative computed tomography) were assessed at baseline and 6 months, as were secondary outcomes total body bone mineral content and lean mass (dual energy X-ray absorptiometry), bone metabolism (serum osteocalcin, N-terminal propeptide of type 1 procollagen (P1NP), C-terminal telopeptide of type 1 collagen (CTX)), physical activity (PAL2 accelerometer) and motor control (Chedoke McMaster) which were also measured at 1 and 3 months.
Results
Thirty-seven participants (69.7 years (SD 11.6), 37.8% females, NIHSS 12.6 (SD 4.7)) were included. The magnitude of difference in vBMD between paretic and non-paretic legs increased within 6 months, with a greater reduction observed in paretic legs (mean difference = 1.5% (95% CI 0.5, 2.6), p= 0.007). At 6 months, better motor control was associated with less bone loss
since stroke (r=0.46, p= 0.02). A trend towards less bone loss was observed in people who regained independent walking compared to those who did not (p= 0.053). Higher baseline daily count of standing up was associated with less change in bone turnover over 6 months: osteocalcin (r=−0.51,
p=0.01),P1NP(r=−0.47, p = 0.01), CTX (r=−0.53, p = 0.01).
Conclusion
Better motor control and walking recovery were associated with reduced bone loss. Interventions targeting these impairments from early post-stroke are warranted.
Clinical trial registration
URL:
http://www.anzctr.org.au
. Unique identifier: ACTRN12612000123842.
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