Figure 6. Cognitive stimulation versus no cognitive stimulation. Outcome: mood. SD: standard deviation, Std. mean difference: standardized mean difference, IV, fixed: a fixed-effects meta-analysis with inverse variances weights, CI: confidence interval, df: degrees of freedom, tau2 and I2: heterogeneity values, Chi2: Chi-square test value, Z: Z-value as the overall effect, p: p-value.
