Influence of Bolus Location and Age on Timing Measures of Swallowing in Healthy Older Adults.

The sample was small: 26 participants, and some bolus-location analyses used only 24 because of missing data. Most participants were female, and the age range was narrow (56 to 77 years), so results may not apply to men or to younger or older adults. The study used thin liquids only, so it does not show how bolus location and timing behave with thicker consistencies. Bolus location varied within participants, which prevented a single bolus-location score per participant for repeated-measures timing analysis. Hyoid burst onset could not be identified in three bolus trials, and bolus location at swallow onset was missing for three trials due to image quality. The study was retrospective and cross-sectional, so it looked at existing VFSS records rather than following participants over time. Participants were healthy volunteers without swallowing complaints, so the findings do not directly describe people with dysphagia.

The paper's funding and conflicts section states that one author disclosed her role as developer of the ASPEKT Method used to analyze the videofluoroscopic swallowing study. It also states that the authors declared no other competing financial or nonfinancial interests.

Do not conclude that a low bolus location at swallow onset is a swallowing disorder. The participants were healthy older adults without swallowing complaints, and bolus location varied widely across repeated swallows, so a single low position may be normal variation.