Table 2 leave-one-out sensitivity analysis for outcomes with more than 3 studies. Pooled estimates of each outcome after leaving out each study on the left column are presented

Diejomaoh [4]

SMD = 0.33 [-0.20, 0.85], I² = 93%, P = 0.22

SMD = 0.52 [0.16, 0.89], I² = 85%, P = 0.005

SMD = 0.79 [0.12, 1.46], I2 = 93%, P = 0.02

SMD = − 0.58 [− 1.15, − 0.01], I2 = 87%, P = 0.05

Edugbe [16]

SMD = 0.16 [-0.25, 0.57], I² = 87%, P = 0.44

SMD = 0.59 [0.25, 0.94], I² = 80%, P = 0.0008

SMD = 0.84 [0.16, 1.53], I2 = 92%, P = 0.02

NR

Kotanaie [20]

SMD = 0.30 [-0.24, 0.84], I² = 93%, P = 0.27

SMD = 0.52 [0.14, 0.90], I² = 85%, P = 0.007

NR

SMD = − 0.58 [− 1.19, 0.02], I2 = 87%, P = 0.06

Craig [8]

SMD = 0.36 [− 0.18, 0.90], I² = 92%, P = 0.19

SMD = 0.54 [0.15, 0.93], I² = 85%, P = 0.006

NR

SMD = − 0.62 [− 1.19, − 0.05], I2 = 83%, P = 0.03

Wang [18]

SMD = 0.38 [− 0.14, 0.91], I² = 92%, P = 0.16

SMD = 0.59 [0.24, 0.94], I² = 82%, P = 0.0010

SMD = 0.88 [0.27, 1.50], I2 = 90%, P = 0.005

NR

Ispasoiu [9]

SMD 0.45 [0.00, 0.90], I² = 89%, P = 0.05

SMD = 0.49 [0.12, 0.86], I² = 84%, P = 0.01

SMD = 0.55 [− 0.02, 1.12], I2 = 90%, P = 0.06

NR

Wani [21]

SMD = 0.20 [− 0.28, 0.69], I² = 91%, P = 0.41

SMD = 0.37 [0.17, 0.57], I² = 44%, P = 0.0003

SMD = 0.57 [− 0.00, 1.14], I2 = 89%, P = 0.05

SMD = − 0.30 [0 −0.52, 0− 0.07], I2 = 0%, P = 0.009