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Cross-tabs of the EAT-10 using a cut-off score of ≥2 [12] (Reference test) and the single question (Index test)
| EAT-10 (Reference test) | Total | ||
|---|---|---|---|
| + (at risk of OD) | − (not at risk) | ||
| Single question ‘What about swallowing?’ (Index test) | |||
| + (Abnormal) | 193 | 7 | 200 |
| − (Normal) | 64 | 39 | 103 |
| Total | 257 | 46 | 303 |
Diagnostic performance of the single question: Se = 0.75, Sp = 0.84, PPV = 0.97 and NPV = 0.38
