Table 2: Opioid requirements, frequency of rescue NSAIDs, and incidence of side effects of analgesics in the PECS II and control groups during the 24 hours after the operation.

PECS II group ()Control group () value

Total opioid requirements (μg)43.8 ± 28.577.0 ± 41.9<0.001
Frequency of rescue NSAIDs1.0 (0.0; 1.0)1.0 (1.0; 1.0)0.213
MBP after incision − MPB before incision (mmHg)5.0 (1.0; 10.5)16.0 (9.0; 24.0)<0.001
HR after incision − HR before incision (beats per minute)0.0 (−2.0; 2.5)3.0 (1.0; 5.0)0.002
Side effects of analgesics (%)7 (17.5%)10 (26.3%)0.504

Data are expressed as mean ± SD (standard deviation), median (interquartile range), or number (%). NRS, Numerical Rating Scale; NSAID, nonsteroidal anti-inflammatory drug; MBP, mean blood pressure; HR, heart rate.