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Table 2 Variables comparing easy and difficult laryngoscopy. Data shown as Number(%) Mean ± SD or median (IQR)

From: Predicting difficult laryngoscopy in morbidly obese Thai patients by ultrasound measurement of distance from skin to epiglottis: a prospective observational study

Variables Easy Laryngoscopy
(n = 75)
Difficult Laryngoscopy
(n = 13)
P value
bAge (years) 38 (29,48) 48 (46,57) 0.08
bBody mass index (kg/m2) 44.0 (39.8, 50.8) 41.8 (37.4, 45.9) 0.19
cSnoring 72 (96) 12 (92.3) 0.48
cPolysomnography 48 (64) 9 (69.2) 1
cApnea-Hyponea Index (AHI)    1
 mild 9 (18.8) 2 (22.2)  
 moderate 10 (20.8) 2 (22.2)  
 severe 29 (60.4) 5 (55.6)  
cModified Mallampati score    0.46
 I 28 (37.3) 5 (38.5)  
 II 24 (32) 6 (46.2)  
 III 19 (25.3) 1 (7.7)  
 IV 4 (5.3) 1 (7.7)  
bThyromental distance (cm) 7.5 (7.0,8.0) 6.5 (6.3,8.0) 0.03
bSternomental distance (cm) 16.8 (152,180) 16.0 (145,163) 0.05
aInterincisor gap (cm) 4.6 (0.7) 4.5 (0.8) 0.59
aNeck circumference (cm) 42.8 (4.3) 41.9 (3.8) 0.51
cAbnormal upper teeth 12 (16) 1 (7.7) 0.68
cUpper lip bite test    0.60
 I 43 (57.3) 10 (76.9)  
 II 29 (38.7) 3 (23.1)  
 III 3 (4) 0 (0)  
aDistance from skin to epiglottis (mm) 10.5 (2.9) 12.5 (3.3) 0.05
  1. a Data are presented as mean (Standard Deviation)
  2. b Data are presented as median (Interquartile range)
  3. c Data are presented as number (Percentage)