Article

OBJECTIVE: To assess consensual validity, interrater reliability, and criterion
validity of the International Dysphagia Diet Standardisation Initiative
Functional Diet Scale, a new functional outcome scale intended to capture the
severity of oropharyngeal dysphagia, as represented by the degree of diet texture
restriction recommended for the patient. DESIGN:
Participants assigned
International Dysphagia Diet Standardisation Initiative Functional Diet Scale
scores to 16 clinical cases. Consensual validity was measured against reference
scores determined by an author reference panel. Interrater reliability was
measured overall and across quartile subsets of the dataset. Criterion validity
was evaluated versus Functional Oral Intake Scale (FOIS) scores assigned by
survey respondents to the same case scenarios. Feedback was requested regarding
ease and likelihood of use. SETTING: Web-based survey. PARTICIPANTS: Respondents
(N=170) from 29 countries. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES:
Consensual validity (percent agreement and Kendall tau), criterion validity
(Spearman rank correlation), and interrater reliability (Kendall concordance and
intraclass coefficients). RESULTS: The International Dysphagia Diet
Standardisation Initiative Functional Diet Scale showed strong consensual
validity, criterion validity, and interrater reliability. Scenarios involving
liquid-only diets, transition from nonoral feeding, or trial diet advances in
therapy showed the poorest consensus, indicating a need for clear instructions on
how to score these situations. The International Dysphagia Diet Standardisation
Initiative Functional Diet Scale showed greater sensitivity than the FOIS to
specific changes in diet. Most (>70%) respondents indicated enthusiasm for
implementing the International Dysphagia Diet Standardisation Initiative Functional Diet Scale. CONCLUSIONS: This initial validation study suggests that
the International Dysphagia Diet Standardisation Initiative Functional Diet Scale
has strong consensual and criterion validity and can be used reliably by
clinicians to capture diet texture restriction and progression in people with dysphagia.
CI - Copyright (c) 2018 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS