Evaluation of real-time tracheal ultrasound versus colorimetric capnography as a point of care tool for confirmation of endotracheal intubation: a randomized controlled study

Ain-Shams Journal of Anesthesiology

Table 1 Comparison between group A (U.S) and group B (colorimetric CO₂ detector) according to baseline characteristics

Baseline characteristics	Group A (U.S) [n = 35]	Group B (colorimetric CO₂ detector) [n = 35]	Test of significant	p value
Age (years)
Range	21–70	22–70	t = 0.411	0.206
Mean ± SD	49.14 ± 13.69	50.86 ± 11.51	t = 0.411	0.206
Sex
Male	22 (62.9%)	20 (57.1%)	X² = 0.221	0.605
Female	13 (37.1%)	15 (42.9%)	X² = 0.221	0.605
BMI [wt/(ht)^2]
Range	24.0-31.6	26.5–33.9	t = 1.03	0.124
Mean ± SD	27.56 ± 2.31	30.29 ± 2.46	t = 1.03	0.124
ASA
I/II	30 (85.7%)	28 (80.0%)	X² = 0.114	0.691
III/IV	5 (14.3%)	7 (20.0%)	X² = 0.114	0.691
Unexpected difficult intubation	3 (8.6%)	5 (14.3%)	X² = 0.631	0.190
No. of attempts of intubation
Range	1–3	1–3	t = 1.15	0.187
Mean ± SD	1.31 ± 0.58	1.43 ± 0.61	t = 1.15	0.187