Normative Data of the Self-Report Version of the German Strengths and Difficulties Questionnaire in an Epidemiological Setting
Abstract
Abstract.Objective: This study served to establish German norms for the Strengths and Difficulties Questionnaire self-report (SDQ-S) by using data from a representative epidemiological sample from the German National Health Interview and Examination Survey for Children and Adolescents (KiGGS study). Although the German version of the SDQ has been widely used and normative data for the parent version (SDQ-P) exist, no German norms for the self-report version have been reported, so that practitioners had to rely on the available British norms. In addition, we investigated whether sex- and age-specific norms are necessary. Methods: At the baseline of the KiGGS study, SDQ-S ratings were collected from n = 6,726 children and adolescents between 11 and 17 years (n = 3,440 boys und n = 3,286 girls). We assessed the internal consistency and age/sex effects of the SDQ-S. Confirmatory factor analysis was conducted to assess the factor structure of the SDQ-S. Banding scores were developed to differentiate children and adolescents with levels of difficulties and categorized them as “normal,” “borderline,” and “abnormal.” General as well as age- and sex-specific bandings were created for both total score and subscales of SDQ-S. In addition, the German norms of the SDQ-S were compared with those of the UK, Norway, and Thailand. Results: The five-factor solution of the SDQ-S (including Emotional symptoms, Conduct problems, Hyperactivity/Inattention, Peer problems, and Prosocial behavior) provided a satisfactory fit to the data. Moderate internal consistencies (Cronbach’s α) were observed for the scales Emotional symptoms, Hyperactivity/Inattention, and Total difficulties score, whereas insufficient internal consistency was found for the scales Peer problems and Conduct problems. However, using McDonald’s ω as a more appropriate measure of homogeneity, internal consistencies were found to be satisfactory for all subscales and for Total difficulties. Normative banding scores were established conservatively to avoid producing too many false positives in the category “abnormal.” In line with previous research, girls showed more emotional problems but fewer Peer problems than boys. German normative bandings of SDQ-S were similar to the original British bandings and those of other countries. Conclusions: This study of the German SDQ-S in a large representative epidemiological sample presents evidence of partly moderate to good psychometric properties. It also supports the usefulness of SDQ-S as an effective and efficient instrument for child and adolescent mental health problems in Germany. German normative banding scores of SDQ-S established in this study were comparable with the original British norms as well as with those of other countries, so that SDQ-S can be recommended as a psychopathological broadband-screening tool.
Literature
(2008). Multicultural assessment of child and adolescent psychopathology with ASEBA and SDQ instruments: research findings, applications, and future directions. Journal of Child and Adolescent Psychiatry, 49, 251–275.
(1987). Child/adolescent behavioral and emotional problems: Implications of cross-informant correlations for situational specificity. Psychological Bulletin, 101, 213–232.
(2007). The self-assessment sheet of the SDQ using an Austrian field test. Journal of Child and Youth Psychiatry and Psychotherapy, 35, 265–271.
Aschpurwis und Behrens GmbH: [BIK regions: metropolitan areas, city regions, middle and low order centers – Description of method of the last update 2001]. Hamburg; 2001.(2004a). Validation of the parent and teacher SDQ in a clinical sample. European Child and Adolescent Psychiatry, 13, II/11–II/16 (Supplement 2).
(2004b). Evaluation of the self-reported SDQ in a clinical setting: Do self-ratings tell us more than ratings by adult informants? European Child and Adolescent Psychiatry, 13, II/17–II/24 (Supplement 2).
. (2015). Six years ahead: Course and predictive value of psychopathological screening in children of the community. European Child and Adolescent Psychiatry, 24, 715–725. doi 10.1007/s00787-015-0706-4
(2013). Psychometric properties of online administered parental strengths and difficulties questionnaire (SDQ), and normative data based on combined online and paper-and-pencil administration. Child and Adolescent Psychiatry and Mental Health, 7, 40.
(2005). The Strengths and Difficulties Questionnaire: U. S. normative data and psychometric properties. Journal of the American Academy of Child and Adolescent Psychiatry, 44, 557–564.
(2016). The Strengths and Difficulties Questionnaire (SDQ): Factor structure and gender equivalence in Norwegian adolescents. PloS one, 11(5), e0152202.
(2015). Investigation of a bifactor model of the Strengths and Difficulties Questionnaire. European Child & Adolescent Psychiatry, 24, 1291–1301.
(2007). Psychometric properties of the French version of the self-report and teacher strengths and difficulties questionnaire (SDQ). European Journal of Psychological Assessment, 23, 79–88.
(1993). What is coefficient alpha? An examination of theory and applications. Journal of Applied Psychology, 78, 98–104.
(2003). Prevalence and development of psychiatric disorders in childhood and adolescence. Archives of General Psychiatry, 60, 837–844.
(1987). A constructive procedure for unbiased controlled rounding. Journal of the American Statistical Association, 82, 520–524.
(2004). Revisiting the factor structure of the Strengths and Difficulties Questionnaire. Journal of the American Academy of Child and Adolescent Psychiatry, 43, 1159–1167.
(2012). Diagnostik psychischer Störungen im Kindes- und Jugendalter [Diagnosis of mental disorders in children and adolescents] (Vol. 2). Hogrefe Verlag.
(2008). The validity, reliability and normative scores of the parent, teacher and self-report versions of the Strengths and Difficulties Questionnaire in China. Child and Adolescent Psychiatry and Mental Health, 2: 8.
(2014). From alpha to omega: A practical solution to the pervasive problem of internal consistency estimation. British Journal of Psychology, 105, 399–412.
, … (2012). Psychometric properties of the Strengths and Difficulties Questionnaire from five European countries. International Journal of Methods Psychiatric Research, 21, 232–245.
(1991). The use of questionnaires in child psychiatry research: Measuring their performance and choosing an optimal cutoff. Journal of Child Psychology and Psychiatry, 32, 677–693.
(1997). The Strengths and Difficulties Questionnaire: A research note. Journal of Child Psychology and Psychiatry, 38, 581–586.
(2001). Psychometric properties of the Strengths and Difficulties Questionnaire. Journal of the American Academy of Child & Adolescent Psychiatry, 40, 1337–1345.
(2000). Using the Strengths and Difficulties Questionnaire (SDQ) to screen for child psychiatric disorders in a community sample. British Journal of Psychiatry, 177, 534–539.
(2010). When to use broader internalising and externalising subscales instead of the hypothesised five subscales on the Strenghs and Difficulties Questionnaire (SDQ). Data from British parents, teachers and children. Journal of Abnormal Child Psychology, 38, 1179–1191.
(1998). The Strengths and Difficulties Questionnaire: A pilot study on the validity of the self-report version. European Child and Adolescent Psychiatry, 7, 125–130.
(2004). Evaluation of the self-reported SDQ in a clinical setting: Do self-reports tell us more than ratings by adult informants? European Journal of Child and Adolescent Psychiatry, 13, 17–23.
(2007). An examination of the convergent and discriminant validity of the Strengths and Difficulties Questionnaire. School PsycholQuart, 22, 380–406.
(1993). Structured interviews for assessing children. Journal of Child Psychology and Psychiatry, 34, 49–68.
(2008). Assessing psychopathological problems of children and adolescents from 3 to 17 years in a nationwide representative sample: Results of the German health interview and examination survey for children and adolescents (KiGGS). European Child & Adolescent Psychiatry, 17(Suppl 1), 34–41.
(2012). The KiGGS study: Nationwide representative longitudinal and cross-sectional study on the health of children and adolescents within the framework of health monitoring at the Robert Koch Institute. Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz, 55, 836–842.
. (2014). Psychological disorders and psychosocial impairment in children and adolescents aged between 3 and 17 years in Germany prevalence and temporal trends at 2 collection periods (2003–2006 and 2009–2012). Federal Health Gazette – Health Research Health Protection, 57, 807–819.
(1965). Survey sampling. New York: Wiley.
(2000). Comparing the German versions of the strengths and difficulties questionnaire (SDQ-Deu) and the child behavior checklist. European Child & Adolescent Psychiatry, 9, 271–276.
(2000).
Reliability of tests: Practical issues . In The handbook of psychological testing (2nd ed., pp. 7–16). London: Routledge.(2007). German version of the Strengths and Difficulties Questionnaire (SDQ-Deu): Psychometrische Qualität der Lehrer-/Erzieherversion für Kindergartenkinder [Psychometric quality of teacher/Educator version for kindergarten children]. Diagnostica, 53(4), 175–183.
(2000). The Strengths and Difficulties Questionnaire among Finnish school-aged children and adolescents. European Child and Adolescent Psychiatry, 9, 277–284.
(2009). Health monitoring at the Robert Koch Institute: Status and perspectives. Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz, 52, 557–570.
Kurth BM, Kamtsiuris P (2008). The challenge of comprehensively mapping children’s health in a nationwide health survey: Design of the German KiGGS-Study. BMC Public Health, 8(1): 196.(2013). The bifactor model of the Strengths and Difficulties Questionnaire. European Journal of Psychological Assessment, 29, 299–307.
(2014). The first KiGGS follow-up (KiGGS Wave 1): Study conduct, sample design, and response. Bundesgesundheitsblatt, Gesundheitsforschung, Gesundheitsschutz, 57, 747–761.
(2015). Die deutsche Selbstbeurteilungsversion des Strengths and Difficulties Questionnaire (SDQ-Deu-S). [The German self-assessment version of the Strengths and Difficulties Questionnaire (SDQ-Deu-S)]. Psychometrische Eigenschaften, Faktorenstruktur und Grenzwerte. Diagnostica, 61, 222–235.
(2013). Response to treatments in youth with disruptive behaviour disorders. Comprehensive Psychiatry, 54, 1009–1015.
(1999). Predicting DSM-III-R disorders from the Youth Self-Report: Analysis of data from a field study. Journal of the American Academy of Child & Adolescent Psychiatry, 38, 1237–1245.
(2004). The self-report version of the Strengths and Difficulties Questionnaire: Its psychometric properties in 8- to 13-year-old non-clinical children. British Journal of Clinical Psychology, 43, 437–448.
(2003). The Strengths and Difficulties Questionnaire (SDQ): Further evidence for its reliability and validity in a community sample of Dutch children and adolescents. European Child and Adolescent Psychiatry, 12, 1–8.
(2015). New evidence of factor structure and measurement invariance of the SDQ across five European nations. European Child & Adolescent Psychiatry, 24, 1523–1534.
(2015). A general psychopathology factor in early adolescence. The British Journal of Psychiatry, 207, 15–22.
(2000).
Klassifikation und Epidemiologie psychischer Störungen [translation please] . In F. Petermann (Ed.), Lehrbuch der klinischen Kinderpsychologie und -psychotherapie (pp. 30–56). Hogrefe: Berlin.(2007). Psychische Gesundheit von Kindern und Jugendlichen in Deutschland Ergebnisse aus der BELLA-Studie im Kinderund Jugendgesundheitssurvey (KiGGS) (2007) [Mental health of children and adolescents in Germany Results from the BELLA study in the child and adolescent health survey]. Bundesgesundheitsblatt, Gesundheitsforschung Gesundheitsschutz, 50, 871–878.
(2009). Coefficients alpha, beta, omega, and the GLB: Comments on Sijtsma. Psychometrika, 74, 145–154.
(2017). Messinvarianz zwischen Eltern- und Jugendversion des Strengths and Difficulties Questionnaire (SDQ)? [Measurement Invariance Between Parent and Youth Version of the Strengths and Difficulties Questionnaire (SDQ)?]. Diagnostica.
(2008). Psychometric properties of the parent strengths and difficulties questionnaire in the general population of German children and adolescents: Results of the BELLA study. European Child & Adolescent Psychiatry, 7 (Suppl 1), 99–105.
(2018). Factor structure and factorial invariance of the strengths and difficulties questionnaire among children of prisoners and their parents. Child Indicators Research, 11(2), 649–660.
(2009). On the use, the misuse, and very limited usefulness of Cronbach’s alpha. Psychometrika, 74, 107–120.
(2003). Starting at the beginning: An introduction to coefficient alpha and internal consistency. Journal of Personality Assessment, 80, 99–103.
(2010). Psychometric properties of the parent and teacher versions of the Strengths and Difficulities Questionnaire for 4- to 12-year-olds: A review. Clinical Child and Family Psychology Review, 13, 254–274.
(2011). Confirmatory factor analysis and factorial invariance analysis of the adolescent self-report Strengths and Difficulties Questionnaire: How important are method effects and minor factors? British Journal of Clinical Psychology, 50, 127–144.
(2006). Strengths and Difficulties Questionnaire: Research and clinical applications. Current Opinion in Psychiatry, 19, 367–372.
(2009). Measuring adolescent psychopathology: psychometric properties of the self-report strengths and difficulties questionnaire in a sample of Chinese adolescents. Journal of Adolescent Health, 45, 55–62.
(2004). Normative data and scale properties of the German parent SDQ. European Child and Adolescent Psychiatry, 13, II3–II10.
(2002). Normierung und Evaluation der deutschen Elternversion des Strengths and Difficulties Questionnaire (SDQ): Ergebnisse einer repräsentativen Felderhebung [Standardization and Evaluation of the German Parent Version of the Strengths and Difficulties Questionnaire (SDQ): Results of a Representative Field Survey]. Zeitschrift für Kinder- und Jugendpsychiatrie und Psychotherapie, 30, 105–112.
