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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