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Published on: December 6, 2016
The Kushida Index as a screening tool for obstructive sleep apnoea-hypopnoea syndrome
S Jauhar1, R Orchardson, S W Banham
1Department of Restorative Dentistry, Glasgow Dental Hospital and School, 378 Sauchiehall Street, Glasgow G2 3JZ. sachin.jauhar@ggc.scot.nhs.uk
Objectives:
To test the validity of the Kushida Index for screening for sleep apnoea in a West of Scotland adult population.
Methods:
Specific intra-oral measurements and respiratory polysomnography were carried out on 71 patients in this prospective study. The intra-oral measurements were applied to the Kushida formula to obtain a value for the Kushida Index. This value was compared to the diagnosis obtained using polysomnography in the conventional manner.
Results:
The sensitivity of the Kushida Index in this present study was 68% (95% CI 50-81) and the specificity was 71% (95% CI 52-84). The positive predictive value was 71% and the negative predictive value was 67%. The Mallampati score, Epworth sleepiness score and enlargement of the tongue, soft palate or tonsils were not statistically significantly related to a diagnosis of sleep apnoea (p >0.05).
Conclusion:
With the limited sensitivity and specificity of the Kushida Index demonstrated in this study, this test cannot be recommended as a screening tool for sleep apnoea in a West of Scotland population.
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