Purpose: To investigate characteristics of dysphagia in the oldest-old population and the effect of aging on swallowing physiology.
Methods: 418 (364 men, 54 women) patients who underwent videofluoroscopic swallow study (VFSS) for dysphagia were included. The patients were divided into an older group, group I (60-79 years old, n = 275) and the oldest-old group, group II (80-96 years old, n = 143). Sex, cognition, duration of symptoms, BMI (body mass index), frailty index derived from comprehensive geriatric assessment (FI-CGA), penetration aspiration scale (PAS), and videofluoroscopic dysphagia scale (VDS) scores and the etiologies of dysphagia were compared between the groups. The correlation analysis of BMI and FI-CGA with dysphagia severity and age was performed.
Results: The proportion of males, K-MMSE scores, the duration of symptoms, BMI scores and FI-CGA were significantly greater in group I than II. The PAS and VDS scores were significantly higher in group II than I. The proportion of CNS disorders was significantly higher in group I than in group II. The proportion of poor general medical condition was significantly higher in group II than in group I. A negative correlation between BMI and dysphagia severity and a positive correlation between FI-CGA and dysphagia severity were observed.
Conclusion: Dysphagia tends to be more severe in the oldest-old, and can be caused by health conditions unrelated to swallowing. Malnutrition and frailty correlated positively with dysphagia severity, irrespective of age.
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