The Egyptian Journal of Otolaryngology

Table 4 T-test statistics of age variable according to treatment groups and results

From: Age-related difficulty in post-intubation tracheal stenosis reconstruction: a comparative analysis of CO2-laser, resection and anastomosis, and costal cartilage grafting techniques

Treatment groups		n	m	SD	p	Mean difference	95% CI of difference
Treatment groups		n	m	SD	p	Mean difference	Lower	Upper
CO₂ laser	Success	14	37.64	8.345	0.006	−11.7	−19.7	−3.8
CO₂ laser	Failure	7	49.43	7.786
TRPA	Success	46	39.39	8.686	0.002	−11.1	−17.952	−4.266
TRPA	Failure	8	50.50	10.184
CCG	Success	6	34.50	4.324	0.011*	−18.50	−24.978	−12.022
CCG	Failure	4	53.00	4.397

TRPA tracheal resection with primary anastomosis, CCG costal cartilage graft
^*p-value obtained from the Mann-Whitney U-test

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