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Table 2 Intraoperative opioid consumption and postoperative pain scores

From: Comparison of plasma levobupivacaine concentrations with and without epinephrine following erector spinae plane block for breast cancer surgery: a randomized controlled trial

  Group L Group LE P value *†
Sample size, n 14 15  
Intraoperative opioid consumption
 Mean fentanyl dose (SD; µg) 276.4 (41.7) 263.7 (41.9) 0.42
 Mean remifentanil dose (SD; µg/kg/min) 0.11 (0.01) 0.11 (0.02) 0.76
Median postoperative NRS (IQR)
 Soon after extubation 0.0 (0.0–2.8) 0.0 (0.0–3.0) 0.45
 5 h after the ESP block 3.0 (2.8–3.5) 4.0 (2.0–5.0) 0.65
 9 h after the ESP block 2.0 (1.0–3.0) 2.0 (1.0–4.0) 0.60
  1. *P value for comparison between groups L and LE. † The t-test was used to compare means and the Mann–Whitney U-test was used to compare medians. SD standard deviation, NRS numerical rating scale, IQR interquartile range, ESP erector spinae plane