Fig. 2. Time course of the distribution of the behavioral pain scores during the first 15 min after tracheal extubation in the desflurane group (top ) and in the remifentanil group (bottom ). Solid bars = calm, gray bars = behavioral or verbal expression of pain, open bars = intense behavioral or verbal manifestation of pain. Asterisks indicate statistically significant differences between the groups (P < 0.05).