Double Lumen Tubes: Usage and Performance by Frequent and Infrequent Users

Table 1

Characteristics of patients in frequent and infrequent double lumen tube user groups.

	Frequent (𝑛=790)	Infrequent (𝑛=99)	𝑃
Age (years ± SD)	62 ± 14	49 ± 21	<0.001
Sex (M/F)	442/349	66/33	<0.05
ASA PS (1/2/3/4)	13/408/346/24	15/41/36/7	<0.005

Values for continuous data are reported as mean ± standard deviation and compared by 𝑡 testing. Categorical data were compared by 𝑋² analysis. Age is reported as mean ± standard deviation. ASA physical status is reported as the number of patients in each category.
ASA PS: American Society of Anesthesiologists physical status classification.