A method for addressing right upper lobe obstruction with right-sided double-lumen endobronchial tubes during surgery: a randomized controlled trial

Table 2 Factors related to the second tracheal intubation in the lateral decubitus position

	Group R (n = 30)	Group L (n = 30)	P value
Time required for tracheal intubation and R-DLT positioning(s)	23.5 (14.5–65.8)	15.0 (12.0–20.0)	0.005^a
Position after intubation (optimal/suboptimal/misplaced/ unsatisfactory)	21/5/4/0	8/19/2/1	> 0.001^b
Number of tracheal intubation attempts (1/2/3)	25/4/1	27/2/1	0.832^b
Ease of placing the R-DLT (easy/difficult/very difficult)	19/8/3	27/3/0	> 0.001^b
Number of repositions (0/1/2/3)	22/6/1/1	24/3/1/2	0.794^b
Patients^c	26	27	1.000^b

^aMedian (IQR) of the non-normal variables (Kolmogorov–Smirnov test, P < 0.05); significance tested by the Mann–Whitney rank sum test
^bNumbers for the categorical variables; significance tested by Fisher’s exact test
^cNumber of patients with optimal or suboptimal positioning of the bronchial tubes

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