*3.2. Risk of Bias of Individual Studies*

The risk of bias for each trial is summarized in Figures 2 and 3. Most of the included studies completed the results with similar groups at the beginning and the end of the treatment, although this information was not clear in three of the studies [28,32,33].

**Figure 2.** Risk of bias of studies included in the systematic review (Balzotti, 2018 [31], Cantarella, 2018 [28], Cohen Mansfield, 2014 [32], Mackenzie, 2006 [33], Moyle, 2018 [29], Shin, 2015 [20], Ylmaz, 2020 [30]).

**Figure 3.** Risk of bias: systematic review authors' judgments about each risk of bias item presented as percentages across all included trials using the Cochrane risk of bias tool (*n* = 7).

Four studies had a low risk of bias in the randomization sequence and the allocation concealment. No study could blind the participants due to the characteristics of the intervention, and in four of the studies the assessment of the results was not blinded either. The report of data was only clear in one study [29].
