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Table 2 Comparison of fentanyl PCA data for patients with and without a FNC

From: Relationships between post operative pain management and short term functional mobility in total knee arthroplasty patients with a femoral nerve catheter: A preliminary study

  FNC group (n = 27) PCA only group (n = 21) Statistical significance
PCA duration (hours) *37.7 ± 2.8 39.6 ± 4.4 NS
Total fentanyl used (μg) Day 0 450 (220, 73) 820 (609, 1165) p < .001
Effect size medium, r = .48
Total fentanyl used (μg) Day 1 1120 (460, 1560) 1388 (1080, 2329) p < .067
Effect size small, r = .23
Total fentanyl used (μg) Day 2 180 (120, 295) 237 (188, 496) p < .03
Effect size medium, r = .31
Total fentanyl (μg) used 1860 (800, 2556) 2820 (2356, 4238) p < .001
Effect size large, r = .52
Fentanyl used (μg)/hour 51.8 (22.8, 66.8) 89 (61, 104) p < .001
Effect size large, r = .52
Fentanyl dose (μg)/BMI 53.6 (31.6, 93.8) 101 (71,129) p < .002
Effect size medium, r = .45
Mean number of dose increases required on Day 0 0 (0, 1) 1 (0,1) p < .016
Effect size medium, r = .35
% successful PCA attempts (Day 0) 75 (49, 89) 75.3 (58.3, 91.8) NS
% successful PCA attempts (Day 1) 81.3 (62.8, 92.5) 83.6 (63.2, 89.4) NS
  1. *Mean ± SD, or median (IQR: 25,75), reported according to normality