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Table 2 The subgroup analysis for the VAS with rest or mobilization at 24 and 48 h

From: Local anesthetic infusion pump for pain management following total knee arthroplasty: a meta-analysis

Outcome

Studies

Overall effects

Heterogeneity

Effect estimate

95% CI

P value

I2 (%)

P value

VAS with rest at 24 h

 low speed

2

−5.91

−11.00, −0.82

0.000

0.0

0.579

 high speed

3

−17.78

−21.54, −14.02

<0.001

9.9

0.330

 ropivacaine

3

−15.00

−18.32, −11.68

0.000

80.7

0.006

 bupivacaine

2

−6.74

−14.06, −0.59

0.072

38.2

0.203

VAS with rest at 48 h

 low speed

2

−3.36

−8.11, 1.38

0.165

0.0

0.843

 high speed

3

−17.79

−20.59, −14.98

0.000

56.5

0.100

 ropivacaine

3

−15.22

−17.78, −12.66

0.000

91.5

0.000

 bupivacaine

3

−4.82

−12.02, 2.38

0.189

0.0

0.614