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. Author manuscript; available in PMC: 2020 Aug 1.
Published in final edited form as: Drug Alcohol Depend. 2019 May 29;201:29–37. doi: 10.1016/j.drugalcdep.2019.03.023

Table 3.

Summary effect size for FA, MD, RD, and AD all ROI by study.

95% Confidence Interval
Outcome NStudies g Lower Upper Z Test of Homogeneity
Fractional Anisotropy 11 −0.37 −0.54 −0.20 −4.22* χ2 (10) = 15.51 (ns)
Mean Diffusivity 7 0.20 −0.01 0.41 1.87 χ2 (6) = 3.40 (ns)
Radial Diffusivity 6 0.24 0.01 0.47 2.03* χ2 (5) = 3.01 (ns)
Axial Diffusivity 5 0.05 −0.20 0.29 0.39 χ2 (4) = 1.22 (ns)
*

p < .05

**

p <.01

g: Hedges’ g.