Table 2.

Inter-rater reliability of the examination procedure

	Investigators 1 and 2		Investigators 2 and 3
	Cohen’s κ	Exact sig.	Cohen’s κ	Exact sig.
SST	0.750	0.000***	0.739	0.05*
WST	1.000	0.071	0.667	0.400
WSTSST	0.632	0.143	0.667	0.400
BST	0.770	0.011*	1.000	0.017*
BSTSST	1.000	0.05*	0.739	0.033*
WSTSST + BSTSST	0.632	0.143	0.250	1.000

The results for the SST, BST and BST_SST showed statistically significant correlations (κ > 0.75)

BST bolus swallow test, BST _SST saliva and bolus swallow test, WST water swallow test, WST _SST saliva and water swallow test

Difference of the two investigators is significant p = 0.000–0.05 (bold values)