Skip to main content

Advertisement

Table 2 T-test, Mann-Whitney U test and Chi-Square/Fisher’s Exact test for all demographics

From: Apnoeic oxygenation by nasal cannula during airway management in children undergoing general anaesthesia: a pilot randomised controlled trial

Variable Control group Intervention group T-test P-value
  Mean ± SD  
Age (m) 56.80 ± 24.487 52.40 ± 26.416 T= 0.473
p=0.640
Height (cm) 111.53 ± 13.89 106.27 ± 15.764 T= 0.971
p=0.340
  Median (IQR) U Value
P-value
Weight (kg) 21 (14 - 23) 14 (13 - 22) U= 85
p=0.267
  Count (%) Chi-square
P-value
Gender    1.292
Male: Female 8 (53.3%): 7 (46.7%) 11(73.3%): 4 (26.7%) p=0.256
ASA class
ASA I 12 (80%) 11 (73.3%) 0.187
ASA II 3 (20%) 4 (26.7%) p=1.000a
Surgery type    
General surgery: 4 (26.7%) 10 (66.7%)  
ENT surgery: 5 (33.3%) 3 (20%)  
Plastic surgery: 1 (6.7%) 1 (6.7%)  
Ophthalmology surgery: 5 (33.3%) 0 (0%) 11.480
Neurosurgery: 0 (0%) 1 (6.7%) p=0.022b,c
  1. M = Month, cm = centimetre, kg = kilogram, ASA class = American Society of Anesthesiologists classification, IQR= Interquartile Range
  2. a Fisher’s Exact is used instead of Pearson Chi-Square when an assumption is violated
  3. b Likelihood ratio is used instead of Pearson Chi-Square when an assumption is violated and the table is bigger than 2*2
  4. c P-value < 0.05 indicates a significant difference between the groups