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Table 2 Visual analogue scale (VAS) postoperative pain scores

From: The efficacy and safety of subcutaneous continuous local infiltration analgesia with ropivacaine in patients undergoing total knee arthroplasty: a comparative study

Time point

Pump (n = 28)

No pump (n = 35)

MD

95% CI

p-value

Mean

SD

Mean

SD

Lower limit

Higher limit

At rest, 12 h

4.68

2.64

5.89

4.02

-1.207

-2.970

0.556

0.176

At rest, 24 h

3.75

2.62

6.63

3.26

-2.879

-4.397

-1.360

 < 0.001

At rest, 48 h

3.36

2.38

5.86

2.90

-2.500

-3.860

-1.140

0.001

At rest, 72 h

2.96

2.17

4.94

3.14

-1.979

-3.375

-0.582

0.006

At rest, 3 months

1.07

0.38

1.66

0.94

-0.586

-0.963

-0.209

0.003

On mobilization, 12 h

5.61

2.74

6.23

4.17

-0.621

-2.452

1.209

0.500

On mobilization, 24 h

4.75

2.50

7.37

2.94

-2.621

-4.019

-1.224

 < 0.001

On mobilization, 48 h

3.86

2.65

7.03

2.64

-3.171

-4.512

-1.831

 < 0.001

On mobilization, 72 h

3.36

2.41

6.11

2.99

-2.757

-4.149

-1.365

 < 0.001

On mobilization, 3 months

1.14

0.59

1.66

0.94

-0.514

-0.921

-0.107

0.014

  1. CI Confidence interval, MD Mean difference, SD Standard deviation