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Table 7 Time to first request of analgesia (h)

From: Ultrasound-guided thoracic paravertebral block vs pectoral nerve block for postoperative analgesia after modified radical mastectomy

  Group A, PVB Group B, PECS t test p value
Number of patients N= 10 N= 8   
Mean ± SD 8.30 ± 4.76 14.00 ± 4.54 6.637 0.020*
Range 1–18 8–18
  1. Independent sample t test
  2. p value > 0.05 NS; *p value < 0.05 S