Fig. 3

Insertion time. The insertion time was faster in Group W (3.60 s [3.15–4.06 s]) than in Group R. Box-and-whisker plot (median, interquartile range, and range) of the insertion time in Group R and Group W. Group R: the Streamlined Liner of the Pharynx Airway (SLIPA) was kept at room temperature; Group W: the SLIPA was pre-warmed to 37 ° C. *P < 0.001