Linking Oropharyngeal Swallowing Physiology and Functional Clinical Predictors in Amyotrophic Lateral Sclerosis.
Kendrea L Focht Garand, Angela M Malek, Kevin Renz Ambrocio
PMID 40741286WHAT IT FOUND
In people with ALS, oral swallowing impairment worsened as respiratory function declined.
However, the standard ALS functional rating scale did not predict swallowing severity, meaning global physical scores may miss specific oral and pharyngeal deficits.
Key findings
01Oral swallowing impairment scores were significantly associated with reduced respiratory function (FVC % predicted).
02The ALS Functional Rating Scale-Revised (ALSFRS-R) did not significantly predict oral or pharyngeal swallowing impairment scores.
03People with ALS showed significantly worse oral and pharyngeal swallowing physiology compared to age- and sex-matched healthy controls.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for SLPs
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What it does not show
The sample was small (21 patients with ALS), and missing data prevented pharyngeal score calculations for 10 participants. The study was retrospective and single-site, introducing referral bias where only patients with suspected swallowing issues underwent MBSS. Most participants had spinal-onset ALS, which may limit generalizability to those with bulbar-onset disease. FVC measurements may have been affected by lip and tongue weakness, potentially confounding the relationship between respiratory and oral swallowing scores.
Declared interests
The authors declared no conflicts of interest. The study was supported by institutional resources at the Medical University of South Carolina.
The easy way to misread this
Do not interpret the lack of correlation between ALSFRS-R and swallowing scores as evidence that swallowing function is stable. The ALSFRS-R measures global physical function and is insensitive to specific oral and pharyngeal deficits. A stable ALSFRS-R does not rule out progressive dysphagia requiring instrumental assessment.