Yoshimatsu Y, Tobino K, Sueyasu T, et al. Int J Chron Obstruct Pulmon Dis. 2019;14:2777–2785.
Page 2780, left column, line 2, the text “42.9% and 96.4%” should read “96.4% and 42.9%”.
Page 2780, left column, lines 1 and 2 from the bottom, the text “[…] in patients with a history of exacerbation in the past year than in those with no such history […]” should read “[…] in patients with no history of exacerbation in the past year than in those with a history […]”.
on page 2780, the sensitivity and specificity values are incorrect. The correct is shown below.
Figure 1 Results of an ROC curve analysis using the swallow frequency in RSST. When the RSST cut-off value was set at 5.0, the sensitivity and specificity were 0.964 and 0.429, respectively, and the area under the ROC curve was 0.775.
Page 2781, Figure 2 legend, the text “[…] in patients with a history of exacerbation in the past year than in those with no such history […]” should read “[…] in patients with no history of exacerbation in the past year than in those with a history […]”.
Page 2782, Figure 3 legend, the text “[…] in patients with a history of exacerbation in the past year than in those with no such history […]” should read “[…] in patients with no history of exacerbation in the past year than in those with a history […]”.
The authors apologize for these errors and advise they do not affect the results of the paper.