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Table 2 Number and percentage of intubation attempts

From: Efficacy and safety of Cohen Flex-Tip blocker and left double lumen tube in lung isolation for thoracic surgery: a randomized comparative study

Number of intubation attempts Left DLT Cohen blocker Chi-square test
No. % No. % ×2 p value
First 18 90 19 95 0.026 0.871
Second 2 10 1 5 0.250 0.617
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