2. Interrater Reliability
The overall modified GUSS scores of two raters achieved high positive
correlation (rs=0.961, P<0.01), and the
overall severity rating of two raters appeared high consistency
(κ=0.849, P<0.01, P0=0.900). Both raters confirmed 16 (40.0%)
patients having severe dysphagia in the sample (κ=1.000,
P<0.01, P0=1.000). The first rater classified 19 (47.5%)
patients as having severe and moderate dysphagia, where the second rater
classified 18 (45.0%) patients (κ=0.950, P<0.01, P0=0.975).
The first rater found 7 (17.5%) patients with no dysphagia, but the
second rater found 4 (10.0%) patients with no dysphagia (κ=0.688,
P<0.01, P0=0.925).