Table 3 Comparison of the percentage of glottic opening (POGO) scale and modified Cormack–Lehane (C–L) grade between video laryngoscopy and direct laryngoscopy, without external laryngeal manipulation.

From: Usefulness of video laryngoscopy in tracheal intubation at thyroid surgical position for intraoperative neuromonitoring

 

Video laryngoscopy

Direct laryngoscopy

Mean difference (95% CI)

P-value

POGO scale (%)

84.6 ± 22.9

58.0 ± 36.3

26.7 (18.4, 35.0)

< 0.001a

modified C–L grade (1/2A/2B/3/4) (n)

25/14/0/0/0

13/16/10/0/0

 

< 0.001b

  1. Data are presented as the mean ± standard deviation or number (95% confidence interval). aPaired t-test. bWilcoxon signed-rank test.
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