Table 1 Methodological quality ratings based on AMSTAR II (k = 60)

Abrahams et al., 2018 [14]

Backhouse et al., 2017 [15]

Bernardo et al., 2018 [16]

Boots et al., 2014 [17]

Brodaty & Arasaratnam, 2012 [18]

Chien et al., 2011 [19]

Clarkson et al., 2018 [20]

Collins & Kishita, 2019 [21]

Cooper et al., 2007 [22]

*Corbett et al., 2012 [23]

Dam et al., 2016 [24]

Deeken et al., 2018 [25]

Egan et al., 2018 [26]

Eggenberger et al., 2013 [27]

Elvish et al., 2013 [28]

Gallagher-Thompson & Coon, 2007 [29]

Godwin et al., 2013 [30]

Greenwood et al., 2016 [31]

Hopkinson et al., 2019 [32]

Hurley et al., 2014 [33]

Jensen et al., 2014 [34]

Jütten et al., 2018 [35]

Kaddour et al., 2019 [36]

Kishita et al., 2018 [37]

Kor et al., 2018 [38]

Lamotte et al., 2017 [39]

Laver et al., 2017 [40]

Li et al., 2013 [41]

*Lins et al., 2014 [42]

*Liu et al., 2017 [43]

Llanque & Enriquez, 2012 [44]

Maayan et al., 2014 [45]

McKechnie et al., 2014 [46]

Morris et al., 2018 [47]

Nguyen et al., 2019 [48]

Olazarán et al., 2010 [49]

Orgeta et al., 2014 [50]

Parra-Vidales et al., 2017 [51]

*Petriwskyj et al., 2016 [52]

Piersol et al., 2017 [53]

Pinquart & Sörensen, 2006 [12]

Powell et al., 2008 [54]

Rausch et al., 2017 [55]

Schoenmakers et al., 2010 [56]

Scott et al., 2016 [57]

Selwood et al., 2007 [58]

Smith et al., 2014 [59]

Smits et al., 2007 [60]

Tang et al., 2016 [61]

*Thompson et al., 2007 [62]

Tretteteig et al., 2016 [63]

Tyack et al., 2017 [64]

Vandepitte et al., 2016 [65]

Vandepitte et al., 2016 [66]

*Vernooij-Dassen et al., 2011 [67]

Waller et al., 2017 [68]

Weinbrecht et al., 2016 [69]

Williams et al., 2019 [70]

*Wilson et al., 2017 [71]

Ying et al., 2018 [72]

Total^d