Correlation Between Neurologic Impairment Grade and Ambulation Status in the Adult Spina Bifida Population.
Anne C Tita, John R Frampton, Christian Roehmer and 3 others
PMID 30932916WHAT IT FOUND
In 409 adults with spina bifida, more severe motor impairment went with less ability to walk.
The Broughton motor scale matched walking category most closely, but the simpler NSBPR scale was nearly as close; the ISNCSCI motor level was less closely linked.
Key findings
01All tested neurologic impairment scales showed significant inverse correlations with Hoffer ambulation status.
02The Broughton classification had the strongest inverse correlation with Hoffer ambulation status (rs = -0.771, P < 0.001).
03The NSBPR scale showed high inverse correlations under both interpretations (rs = -0.763 for strength 3/5 or greater and rs = -0.716 for strength 1/5 or greater, P < 0.001), while the ISNCSCI motor scale showed only a moderate inverse correlation (rs = -0.565, P < 0.001).
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study reviewed clinic records from each patient's most recent visit, so it cannot show that impairment grade causes ambulation status. Some muscle strength data were missing, and the authors substituted other muscle tests for the Broughton and ISNCSCI scales, which may have moved some patients into different motor levels. Multiple examiners performed muscle testing, which may have introduced variation, although a single attending physiatrist conducted or verified exams. The study used motor testing only, so it may not capture all factors related to walking. The Hoffer ambulation scale has low sensitivity, which may limit how reliably it can be correlated with impairment scales. The sample was mostly white and non-Hispanic/non-Latino, so results may not apply to other demographic groups. The study was done at one adult spina bifida clinic, so patient mix and testing practices may differ elsewhere.
Declared interests
The supplied metadata lists research support as Research Support, U.S. Gov't, P.H.S. No author conflicts of interest or industry funding are reported in the supplied text.
The easy way to misread this
Do not conclude that the Broughton scale should be used routinely because it had the strongest correlation. It uses many muscle tests that can be hard to perform in a busy clinic, and the simpler NSBPR scale was nearly as strong.