“…Characteristics of the 21 studies (Holstein et al, 2020; Kelly et al, 2019; Pinto et al, 2019; Batis et al, 2016; Makkes et al, 2011; Clifton et al, 2011; Miller et al, 2020; Mathur et al, 2020; Rombaldi et al, 2011; Niven et al, 2014; Arcan et al, 2014; Rouche et al, 2019; Vereecken et al, 2005; Sayegh et al, 2002; Schneider et al, 2020; Olmedo et al, 2018; Han and Powell 2013; Bernsdorf et al, 2016; French et al, 2013; McNeill et al, 2017; Aburto et al, 2018) included in the systematic review are represented in Table 2. Of these, 13 were cross-sectional (Kelly et al, 2019; Pinto et al, 2019; Batis et al, 2016; Makkes et al, 2011, Clifton et al, 2011; Miller et al, 2020; Mathur et al, 2020; Rombaldi et al, 2011; Niven et al, 2014; Arcan et al, 2014; Rouche, et al 2019; Vereecken et al, 2005) two were longitudinal (Olmedo et al, 2018; Han et al, 2013) and trend analysis or panel data was available for the remaining six studies, with the majority of them being National surveys reported from developed countries (Holstein et al, 2020; Han et al, 2013; Bernsdorf et al, 2016; French et al, 2013; McNeill et al, 2017; Aburto et al, 2018).…”