“…Although the SDQ is commonly used as a screening and research tool in different countries and exists in numerous language versions, normative data are only available from a limited number of countries, ages and informants (see http://www.sdqinfo.org). Previous studies on the psychometric properties of the SDQ have shown that norms vary across cultural settings (Aiko & Yoko, ; Borg, Kaukonen, Joukamaa & Tamminen, ; Bourdon, Goodman, Rae, Simpson & Koretz, ; Kremer et al , ; Lai et al , ; Maurice‐Stam et al , ; Niclasen, Teasdale, Andersen, Skovgaard, Elberling & Obel, ; Tobia & Marzocchi, ; Woerner, Becker & Rothenberger, ). Hence, to use the SDQ in research for cross‐country comparisons of children’s mental health problems or in paediatric care as an instrument to identify children with mental health problems, population‐specific norms and percentile cut‐off values are needed (Goodman et al , ).…”