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Table 2 Post-surgical clinical data and rehabilitation milestones in LIA and SNB patients

From: Local infiltration of analgesia and sciatic nerve block provide similar pain relief after total knee arthroplasty

Variables

LIA group (n = 41)

SNB group (n = 38)

P value

Passive knee flexion angle (degrees)

 POD 7

108 ± 13

104 ± 14

0.150

 POD 14

119 ± 12

116 ± 12

0.337

 POD 21

123 ± 12

123 ± 8

0.978

C-reactive protein level (mg/dl)

 POD 1

1.39 ± 0.71

3.77 ± 1.78

<0.001*

 POD 3

12.14 ± 5.22

15.47 ± 4.20

0.006*

 POD 7

5.53 ± 7.02

6.13 ± 8.68

0.762

 POD 14

1.19 ± 1.42

1.26 ± 0.99

0.841

Time to achieve rehabilitation milestones (days)

 Ambulation with a walker

2.0 (2.0-3.0)

2.0 (1.25–3.0)

0.648

 Straight leg raise

3.0 (3.0–4.0)

3.0 (3.0–4.0)

0.821

 Ambulation with a cane

9.0 (7.0–11.5)

8.0 (7.0–10.0)

0.818

 Stairs with a rail

11.0 (9.0–17.0)

12.0 (9.0–16.25)

0.886

Length of hospital stay (days)

24.0 (20.0–32.0)

24.0 (22.0–30.0)

0.738

Knee Society Score (function)

 Before surgery

39.2 ± 25.2

41.9 ± 28.2

0.624

 At discharge

49.3 ± 16.2

51.6 ± 14.1

0.791

Knee Society Score (knee)

 Before surgery

44.9 ± 13.7

47.5 ± 17.5

0.661

 At discharge

83.9 ± 10.0

84.9 ± 11.8

0.325

Induction time (min)

54.1 ± 6.4

61.0 ± 8.5

<0.001*

Surgical time (min)

73.5 ± 15.6

69.5 ± 13.1

0.215

Time of motor block in toe motion (h)

1.5 ± 4.4

6.7 ± 4.8

<0.001*

Requirement of diclofenac (mg)

0 (0–25)

0 (0–50)

0.159

Adverse effects

 Nausea or vomiting (%)

5 (12.2)

7 (18.4)

0.444

 Symptoms of local anesthetic poisoning (%)

0 (0)

0 (0)

1.00

  1. Data are presented as absolute number (percentage), median (interquartile range), or mean (SD) as appropriate for the variables and compared by Mann-Whitney U test or chi-square test. * Statistically significant P < 0.05. LIA local infiltration of analgesia, SNB sciatic nerve block, POD post-operative day