Table 3 Primary outcomes of meta-analyses in included randomized controlled trials.

From: Adductor canal block versus femoral nerve block for total knee arthroplasty: a meta-analysis of randomized controlled trials

Variables

Studies

Patients (n)

Overall Effect

Heterogeneity P Value (I2)

Model

P value

SMD/MD (95% CI)

Pain score at rest

2 h

3

167

0.76

0.05 (−0.26, 0.35)

0.95 (0%)

F

4 h

3

196

0.8

−0.04 (−0.32, 0.24)

0.14 (50%)

F

6–8 h

5

368

0.83

0.02 (−0.18, 0.23)

0.09 (50%)

F

12 h

3

216

0.07

−0.24 (−0.51, 0.02)

0.59 (0%)

F

24 h

9

612

0.9

−0.02 (−0.26, 0.23)

0.02 (58%)

R

24 h *

8

552

0.41

0.07 (−0.10, 0.24)

0.29 (18%)

F

48 h

9

612

0.25

−0.09 (−0.25, 0.06)

0.70 (0%)

F

72 h

3

160

0.76

−0.05 (−0.36, 0.26)

0.33 (11%)

F

Pain score at activity

2 h

3

167

0.4

0.13 (−0.17, 0.44)

0.18 (41%)

F

4 h

2

98

1

0.00 (−0.40, 0.40)

1 (0%)

F

6–8 h

3

177

0.96

−0.01 (−0.30, 0.29)

0.67 (0%)

F

12 h

2

118

0.76

−0.06 (−0.42, 0.30)

0.38 (0%)

F

24 h

7

437

0.75

−0.03 (−0.22, 0.16)

0.24 (25%)

F

48 h

7

437

0.89

−0.01 (−0.20, 0.17)

0.42 (0%)

F

72 h

3

160

0.14

0.24 (−0.08, 0.55)

0.24 (30%)

F

Muscle strength (5-grade scale)

2 h

2

118

0.24

0.34 (−0.23, 0.90)

0.14 (54%)

R

4–6 h

3

178

0.0002 *

1.50 (0.70, 2.29)

0.006 (81%)

R

4–6 h *

2

98

<0.0001 *

1.89 (1.40, 2.37)

0.76 (0%)

F

6–8 h

2

97

0.08

0.36 (−0.04, 0.77)

0.26 (22%)

F

12 h

2

118

<0.0001 *

0.87 (0.49, 1.25)

0.20 (39%)

F

24 h

6

341

<0.0001 *

0.82 (0.45, 1.18)

0.02 (62%)

R

24 h *

4

202

<0.0001 *

1.09 (0.79, 1.39)

0.55 (0%)

F

48 h

6

341

<0.0001 *

0.52 (0.13, 0.91)

0.008 (68%)

R

48 h *

4

241

0.003 *

0.63 (0.29, 0.97)

0.28 (21%)

F

72 h

3

160

0.03 *

0.91 (0.08, 1.74)

0.003 (83%)

R

72 h *

2

80

<0.0001 *

1.32 (0.84, 1.81)

1.00 (0%)

F

Quadriceps strength (MVIC)

2

97

<0.0001 *

1.55 (1.09, 2.01)

0.39 (0%)

F

Adductor strength (MVIC)

2

97

0.59

−0.27 (−1.25, 0.72)

0.02 (83%)

R

  1. MVIC, maximum voluntary isometric contraction; SMD, standard mean differences; MD, mean differences; F, fixed-model effect; R, random-model effect.
  2. * P values in bold denotes significance.