“…Ghaziuddin, Weidmer‐Mikhail, and Ghaziuddin (1998) reported an age range of 8–51 years, with a mean age of 15.1 years old. A mixture of cross‐sectional (Demirkaya, Tutkunkardas, & Mukaddes, 2016; Mattila et al., 2010; Mazefsky, Kao, & Oswald, 2011; Montazeri, de Bildt, Dekker, & Anderson, 2020; Mukaddes & Fateh, 2010; Phung, Abdullah, & Goldberg, 2019; Vickerstaff, Heriot, Wong, Lopes, & Dossetor, 2007; Witwer & Lecavalier, 2010), prospective designs (Bitsika, Sharpely, Andronicos, & Agnew, 2016; Ghaziuddin et al., 1998; Salazar et al., 2015), and case‐control (case controls, unless comprised of an autistic group, are not reported in this review, please see individual papers for details) studies were included. Six studies were conducted in United States (Ghaziuddin et al., 1998; Joshi et al., 2018; Lopata et al., 2010; Mazefsky et al., 2011; Phung et al., 2019; Witwer & Lecavalier, 2010), three in Turkey (Demirkaya et al., 2016; Mukaddes & Fateh, 2010; Şahin, Bozkurt, & Karabekiroğlu, 2019), three in Australia (Bitsika et al., 2016; Bitsika & Sharpley, 2015; Vickerstaff et al., 2007), two in the United Kingdom (Green, Gilchrist, Burton, & Cox, 2000; Salazar et al., 2015), two in Finland (Mattila et al., 2010; Reinvall et al., 2016), one in Canada (Orinstein et al., 2015), one in the Netherlands (Montazeri et al., 2020), and one in Italy (Mazzone et al., 2013).…”