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Forest plots for primary and secondary outcomes with subgroup analyses of mode application (a) gait speed, (b) six-minute walking test, (c) functional ambulation category, (d) Tinetti test, (e) Rivermead Mobility Index, (f) timed up and go test, (g) Berg Balance Scale. CI, confidence interval; Std diff in means, standard difference in means. *Anode tDCS used the fixed-effect model while dual-hemispheric tDCS used the random effect model. #Data without subgroup analysis.
