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Fig. 2 | BMC Anesthesiology

Fig. 2

From: Pain management after ambulatory surgery: a prospective, multicenter, randomized, double-blinded parallel controlled trial comparing nalbuphine and tramadol

Fig. 2

The VAS at rest in the experimental (Group E) and control group (Group C). Time points: T1: before administration; T2: after administration at 30 min; T3: after administration at 2 h; T4: after administration at 4 h; T5: after administration at 6 h. aAfter administration, the VAS of Group E was lower than that of Group C, from T2-T5; bthere was a statistically significant difference in VAS between the 2 groups at T5. Data are expressed as mean ± standard deviation

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