Intraobserver reliability and validity of a single ultrasonic measurement of the lateral condyle-capsule distance in the temporomandibular joint

Purpose The purpose of the study was to examine the reliability and validity of a single lateral condyle-capsule distance (LCCD) measurement while saving on economic costs and clinical resources. Methods A longitudinal test–retest design was used to assess the reliability and validity of single-exam...

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Bibliographic Details
Published in:Journal of ultrasound 2023-09, Vol.27 (3), p.479-485
Main Authors: Delgado-Delgado, Raquel, Conde-Vázquez, Orlando, Fall, Fiona Mc, Fernández-Rodríguez, Tomás
Format: Article
Language:English
Subjects:
Adult
Correlation coefficients
Cost analysis
Economic impact
Error analysis
Female
Humans
Joint Capsule - diagnostic imaging
Longitudinal Studies
Male
Mandibular Condyle - diagnostic imaging
Medicine
Medicine & Public Health
Middle Aged
Observer Variation
Original Paper
Reliability
Reproducibility of Results
Temporomandibular Joint - diagnostic imaging
Ultrasonic methods
Ultrasonic testing
Ultrasonography - methods
Ultrasound
Validity
Young Adult
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Summary:Purpose The purpose of the study was to examine the reliability and validity of a single lateral condyle-capsule distance (LCCD) measurement while saving on economic costs and clinical resources. Methods A longitudinal test–retest design was used to assess the reliability and validity of single-examiner measures over 72 TMJ sonographic analyses. Intraclass correlation coefficients (ICC) and a Bland–Altman plot were used to study reliability and validity, comparing the first measurement of the LCCD to the mean of 3 measurements taken one week later by the same examiner. Results ICC show intraobserver reliability of 0.981, 95% confidence intervals (CI) of 0.969 to 0.988. The mean difference between the ultrasound measurements is 0.019 mm (95% CI 0.0005–0.0383) with a standard deviation of 0.080 mm, demonstrating robust validity. The 95% Limits of Agreement (LoA) are − 0.138 for the lower limit and 0.177 for the upper. Mean relative error is 0.009 mm. Conclusion Intraobserver reliability of a trained examiner is very high in the single measurement of the LCCD and validity is significant compared to more complex methods. The risk of bias is low since the mean of three LCCD measurements is calculated as opposed to recording only one single measurement.
ISSN:1876-7931
1971-3495
1876-7931
DOI:10.1007/s40477-023-00818-z