Studies

VR Mean (S.D.)

Control Mean (S.D.)

Mean difference (95% CI)

Edmond 2002 [32]

6.68 (1.09)

6.68 (0.07)

0.00 (−1.51 to 1.51)

Fried 2010 [28]

6.65 (2.53)

2.73 (1.89)

3.92 (2.16 to 5.68)