Fig. 3

The anti-PONV effect of penehyclidine over time. The PONV incidences in different postoperative periods are shown in the figure. ^†P < 0.01 vs. the incidence during 2 ~ 6 h in normal saline group; ^**P < 0.01 and ^*P < 0.05 vs. the time-matched normal saline group, analyzed by Fisher’s exact test. PONV, postoperative nausea and vomiting