Fawcett EJ, Power H, Fawcett JM (2020) Women are at greater risk of OCD than men: a meta-analytic review of OCD prevalence worldwide. J Clin Psychiatr. https://doi.org/10.4088/JCP.19r13085

Article  Google Scholar 

Anholt GE et al (2014) Age of onset in obsessive-compulsive disorder: admixture analysis with a large sample. Psychol Med 44(1):185–194

Article  CAS  PubMed  Google Scholar 

American Psychiatric Association (2013) Diagnostic and statistical manual of mental disorders, fifth edition (DSM-5(TM)). American Psychiatric Publishing, Arlington

Book  Google Scholar 

Nakatani E et al (2011) Children with very early onset obsessive-compulsive disorder: clinical features and treatment outcome. J Child Psychol Psychiatr 52(12):1261–1268

Article  Google Scholar 

Selles RR, Storch EA, Lewin AB (2014) Variations in symptom prevalence and clinical correlates in younger versus older youth with obsessive-compulsive disorder. Child Psychiatr Hum Dev 45(6):666–674

Article  Google Scholar 

Smarason O et al (2022) Age differences in children with obsessive-compulsive disorder: symptoms, comorbidity, severity and impairment. Nord J Psychiatr. https://doi.org/10.1080/08039488.2021.2019917

Article  Google Scholar 

Højgaard DRMA et al (2018) Symptom Dimensions and Clinical Correlates of OCD in a Large Sample of Children and Adolescents. In: Højgaard DRMA (ed) 65th annual meeting. The American Academy of Child and Adolescent Psychiatry, Seattle

Google Scholar 

Nestadt G et al (2009) Obsessive-compulsive disorder: subclassification based on co-morbidity. Psychol Med 39(9):1491–1501

Article  CAS  PubMed  Google Scholar 

Højgaard DRMA et al (2018) Obsessive-compulsive symptom dimensions: Association with comorbidity profiles and cognitive-behavioral therapy outcome in pediatric obsessive-compulsive disorder. Psychiatr Res 270:317–323

Article  Google Scholar 

Selles RR et al (2018) Symptom insight in pediatric obsessive-compulsive disorder: outcomes of an international aggregated cross-sectional sample. J Am Acad Child Adolesc Psychiatr 57(8):615–619

Article  Google Scholar 

Krueger RF, Markon KE (2006) Understanding psychopathology: melding behavior genetics, personality, and quantitative psychology to develop an empirically based model. Curr Dir Psychol Sci 15(3):113–117

Article  PubMed  PubMed Central  Google Scholar 

Gillan CM, Fineberg NA, Robbins TW (2017) A trans-diagnostic perspective on obsessive-compulsive disorder. Psychol Med 47(9):1528–1548

Article  CAS  PubMed  PubMed Central  Google Scholar 

Scahill L et al (1997) Children’s yale-brown obsessive compulsive scale: reliability and validity. J Am Acad Child Adolesc Psychiatr 36(6):844–852

Article  CAS  Google Scholar 

Bernstein GA et al (2013) Pediatric obsessive–compulsive disorder: Symptom patterns and confirmatory factor analysis. J Obsess Compuls Relat Disord 2(3):299–305

Article  Google Scholar 

Bloch MH et al (2008) Meta-analysis of the symptom structure of obsessive-compulsive disorder. Am J Psychiatr 165(12):1532–1542

Article  PubMed  Google Scholar 

Højgaard DRMA et al (2017) Structure and clinical correlates of obsessive-compulsive symptoms in a large sample of children and adolescents: a factor analytic study across five nations. Eur Child Adolesc Psychiatr 26(3):281–291

Article  Google Scholar 

Stewart SE et al (2008) Four-factor structure of obsessive-compulsive disorder symptoms in children, adolescents, and adults. J Am Acad Child Adolesc Psychiatr 47(7):763–772

Article  Google Scholar 

Petersen KJ, Qualter P, Humphrey N (2019) The application of latent class analysis for investigating population child mental health: a systematic review. Front Psychol 10:1214

Article  PubMed  PubMed Central  Google Scholar 

Molenaar PCM, von Eye A (1994) On the arbitrary nature of latent variables. In: von Eye A, Clogg CC (eds) Latent variables analysis: Applications for developmental research. Sage Publications, Inc., Thousand Oaks, CA, pp 226–242

Google Scholar 

Van Lissa CJ, Garnier-Villarreal M, Anadria D (2023) Recommended practices in latent class analysis using the open-source R-package tidySEM. Struct Equat Model Multidiscip J. https://doi.org/10.1080/10705511.2023.2250920

Article  Google Scholar 

Delucchi KL et al (2011) Latent class analysis of the yale-brown obsessive-compulsive scale symptoms in obsessive-compulsive disorder. Compr Psychiatr 52(3):334–341

Article  Google Scholar 

Atli A et al (2014) Latent class analysis of obsessive-compulsive symptoms in a clinical sample. Compr Psychiatr 55(3):604–612

Article  Google Scholar 

Nestadt G et al (2003) The identification of OCD-related subgroups based on comorbidity. Biol Psychiatr 53(10):914–920

Article  Google Scholar 

Hybel KA et al (2017) Symptom profiles and executive function in childhood obsessive-compulsive disorder. J Obsess-Compu Relat Disord 14:36–46

Article  Google Scholar 

Ivarsson T, Valderhaug R (2006) Symptom patterns in children and adolescents with obsessive-compulsive disorder (OCD). Behav Res Ther 44(8):1105–1116

Article  PubMed  Google Scholar 

Torp NC et al (2015) Effectiveness of cognitive behavior treatment for pediatric obsessive-compulsive disorder: acute outcomes from the nordic long-term OCD treatment study (NordLOTS). Behav Res Ther 64:15–23

Article  PubMed  Google Scholar 

Melin K et al (2015) Treatment and 12 month outcome of children and adolescents with obsessive-compulsive disorder: a naturalistic study. J Obsess-Compu Relat Disord 6:1–6

Article  Google Scholar 

Storch EA et al (2016) Efficacy of augmentation of cognitive behavior therapy with weight-adjusted d-cycloserine vs placebo in pediatric obsessive-compulsive disorder: a randomized clinical trial. JAMA Psychiat 73(8):779–788

Article  Google Scholar 

Stewart SE et al (2017) A multisite study of family functioning impairment in pediatric obsessive-compulsive disorder. J Am Acad Child Adolesc Psychiatr 56(3):241–249

Article  Google Scholar 

Farrell L et al (2022) Efficacy of D-cycloserine augmented brief intensive cognitive-behavioural therapy for paediatric obsessive-compulsive disorder: a randomised clinical trial. Depress Anxiety 39(6):461–473

Article  CAS  PubMed  PubMed Central  Google Scholar 

Kaufman J et al (1997) Schedule for affective disorders and schizophrenia for school-age children-present and lifetime version (K-SADS-PL): initial reliability and validity data. J Am Acad Child Adolesc Psychiatr 36(7):980–988

Article  CAS  Google Scholar 

Silverman WK, Albano AM (1996) The anxiety disorders interview schedule for children and parents— DSM-IV version. Graywind, New York

Google Scholar 

Storch EA et al (2004) Psychometric evaluation of the children’s yale-brown obsessive-compulsive scale. Psychiatr Res 129(1):91–98

Article  Google Scholar 

Piacentini J et al (2003) Functional impairment in children and adolescents with obsessive-compulsive disorder. J Child Adolesc Psychopharmacol 13(Suppl 1):S61–S69

Article  PubMed  Google Scholar 

Piacentini J et al (2007) Functional impairment in childhood OCD: development and psychometrics properties of the child obsessive-compulsive impact scale-revised (COIS-R). J Clin Child Adolesc Psychol 36(4):645–653

Article  PubMed  Google Scholar 

Calvocoressi L et al (1999) Family accommodation of obsessive-compulsive symptoms: instrument development and assessment of family behavior. J Nerv Ment Dis 187(10):636–642

Article  CAS  PubMed  Google Scholar 

Flessner CA et al (2011) Predictors of parental accommodation in pediatric obsessive-compulsive disorder: findings from the pediatric obsessive-compulsive disorder treatment study (POTS) trial. J Am Acad Child Adolesc Psychiatr 50(7):716–725

Article  Google Scholar 

Pinto A, Van Noppen B, Calvocoressi L (2013) Development and preliminary psychometric evaluation of a self-rated version of the family accommodation scale for obsessive-compulsive disorder. J Obsess Compuls Relat Disord 2(4):457–465

Article  Google Scholar 

Muthén LK, Muthén BO (1998) Mplus user´s guide, 8th edn. Muthén & Muthén, Los Angeles

Google Scholar 

Satorra A, Bentler PM (2001) A scaled difference chi-square test statistic for moment structure analysis. Psychometrika 66(4):507–514

Article  Google Scholar 

Rosseel Y (2012) lavaan: an R package for structural equation modeling. J Stat Softw 48(2):1–36

Article  Google Scholar 

Visser I, Speekenbrink M (2010) depmixS4: an R package for hidden markov models. J Stat Softw 36(7):1–21

Article  Google Scholar 

Masyn KE (2013) Latent class analysis and finite mixture modeling. In: Little TD (ed) The oxford handbook of quantitative methods. Oxford University Press, pp 551–611

Google Scholar 

Nylund KL, Asparoutiov T, Muthen BO (2007) Deciding on the number of classes in latent class analysis and growth mixture modeling: A Monte Carlo simulation study. Struct Equ Model Multidiscip J 14(4):535–569

Article  Google Scholar 

Nylund-Gibson K (2018) Ten frequently asked questions about latent class analysis. Transl Issu Psychol Sci. https://doi.org/10.1037/tps0000176

Article  Google Scholar 

Howard MC (2016) A review of exploratory factor analysis decisions and overview of current practices: what we are doing and how can we improve? Int J Hum-Comput Interact 32(1):51–62

Article  Google Scholar 

Cervin M et al (2020) Incompleteness, harm avoidance, and disgust: a comparison of youth with OCD, anxiety disorders, and no psychiatric disorder. J Anxiety Disord 69:102175

Article  PubMed  Google Scholar 

Cervin M et al (2021) Involvement of fear, incompleteness, and disgust during symptoms of pediatric obsessive-compulsive disorder. Eur Child Adolesc Psychiatr 30(2):271–281

Article