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The mean scores and ANCOVAa results of main outcomes before and after intervention. (n = 72)ANCOVA: Analysis of covariance; CG: Active control group; FG: Face‐to‐face group; NFG: Non‐face‐to‐face group; VMST: Visual Memory Span test; VSMB: Visual Memory Span Backward task. Error bars represented standard deviation. aAge, education level and the score of MoCA‐J were set as covariates. *P < .05
