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Table 5 Pain NRS of IV-PCA, C-ACB, and PCA + sACB

From: Single shot adductor canal block combined with intravenous patient-controlled analgesia can be effective as continuous adductor canal block in reducing opioid consumption and breakthrough pain after total knee arthroplasty

Pain-NRS

IV-PCA (n = 180)

C-ACB (n = 173)

PCA + sACB (n = 129)

p-valuea

POD1

0A

3.52 ± 1.91

3.41 ± 1.77

3.49 ± 1.63

0.836

8A

4.57 ± 2.21

4.05 ± 1.75

4.11 ± 1.80

*0.025 b

4P

4.39 ± 1.86

3.99 ± 1.53

3.91 ± 1.55

*0.019 c

POD2

0A

4.18 ± 1.78

3.88 ± 1.38

3.83 ± 1.39

0.091

8A

3.84 ± 1.80

3.65 ± 1.40

3.85 ± 1.54

0.451

4P

3.69 ± 1.66

3.73 ± 1.36

3.81 ± 1.41

0.781

POD3

0A

3.70 ± 1.68

3.68 ± 1.42

3.73 ± 1.44

0.958

8A

3.63 ± 1.75

3.60 ± 1.48

3.62 ± 1.45

0.980

4P

3.38 ± 1.37

3.19 ± 1.08

3.47 ± 1.32

0.131

POD4

0A

3.49 ± 1.34

3.18 ± 1.08

3.40 ± 1.16

0.056

8A

3.74 ± 1.63

3.49 ± 1.43

3.57 ± 1.42

0.274

4P

3.53 ± 1.32

3.53 ± 1.25

3.61 ± 1.18

0.815

POD5

0A

3.29 ± 1.23

3.42 ± 1.26

3.59 ± 1.18

0.115

8A

3.29 ± 1.42

3.57 ± 1.35

3.50 ± 1.30

0.154

4P

3.44 ± 1.37

3.47 ± 1.12

3.52 ± 1.20

0.855

  1. Values are presented as mean ± standard deviation
  2. NRS Numerical rating scale, IV-PCA Intravenous patient-controlled analgesia, C-ACB Continuous adductor canal block, sACB Single-shot adductor canal block, POD Postoperative day
  3. a One-way analysis of variance
  4. b Post hoc (Bonferroni’s method) analysis showed that Pain NRS of C-ACB was lower than that of IV-PCA
  5. c Post hoc (Bonferroni’s method) analysis showed that Pain NRS of PCA + sACB was lower than that of IV-PCA
  6. * Statistically significant at p < 0.05