Table 3.

Cross-tabs of the EAT-10 using a cut-off score of ≥3 [11] (Reference test) and the single question “What about swallowing?” (Index test)

	EAT-10 (Reference test)		Total
	+ (at risk of OD)	− (not at risk)
Single question ‘What about swallowing?’ (Index test)
+ (Abnormal)	185	15	200
− (Normal)	59	44	103
Total	244	59	303

Diagnostic performance of the single question: Se = 0.76, Sp = 0.75, PPV = 0.93 and NPV = 0.43