Auerbach, JG, Zilberman-Hayun, Y, Atzaba-Poria, N and Berger, A (2017) The contribution of maternal ADHD symptomatology, maternal DAT1, and home atmosphere to child ADHD symptomatology at 7 years of age. Journal of Abnormal Child Psychology 45, 415–427.
Banerjee, TD, Middleton, F and Faraone, SV (2007) Environmental risk factors for attention-deficit hyperactivity disorder. Acta Paediatrica 96, 1269–1274.
Chang, Z, Lichtenstein, P, Asherson, PJ and Larsson, H (2013) Developmental twin study of attention problems: high heritabilities throughout development. JAMA Psychiatry 70, 311–318.
Chen, Q, Brikell, I, Lichtenstein, P, Serlachius, E, Kuja-Halkola, R, Sandin, S et al. (2016) Familial aggregation of attention-deficit/hyperactivity disorder. Journal of Child Psychology and Psychiatry 58, 231–239.
Chudal, R, Gissler, M, Sucksdorff, D, Lehti, V, Suominen, A, Hinkka-Yli-Salomäki, S et al. (2014) Parental age and the risk of bipolar disorders. Bipolar Disorders 16, 624–632.
Chudal, R, Joelsson, P, Gyllenberg, D, Lehti, V, Leivonen, S, Hinkka-Yli-Salomäki, S et al. (2015) Parental age and the risk of attention-deficit/hyperactivity disorder: a nationwide, population-based cohort study. Journal of the American Academy of Child and Adolescence Psychiatry 54, 487–494.
Costello, EJ, Compton, SN, Keeler, G and Angold, A (2003) Relationships between poverty and psychopathology: a natural experiment. JAMA 290, 2023–2029.
Cross-Disorder Group of the Psychiatric Genomics Consortium (2013 a) Genetic relationship between five psychiatric disorders estimated from genome-wide SNPs. Nature Genetics 45, 984–994.
Cross-Disorder Group of the Psychiatric Genomics Consortium (2013 b) Identification of risk loci with shared effects on five major psychiatric disorders: a genome-wide analysis. Lancet 381, 1371–1379.
Faraone, SV, Perlis, RH, Doyle, AE, Smoller, JW, Goralnick, JJ, Holmgren, MA et al. (2005) Molecular genetics of attention-deficit/hyperactivity disorder. Biological Psychiatry 57, 1313–1323.
Gershon, J (2002) A meta-analytic review of gender differences in ADHD. Journal of Attention Disorders 5, 143–154.
Ghirardi, L, Brikell, I, Kuja-Halkola, R, Freitag, CM, Franke, B, Asherson, P et al. (2018) The familial co-aggregation of ASD and ADHD: a register-based cohort study. Molecular Psychiatry 23, 257–262.
Gyllenberg, D, Gissler, M, Malm, H, Artama, M, Hinkka-Yli-Salomäki, S, Brown, AS et al. (2014) Specialized service use for psychiatric and neurodevelopmental disorders by age 14 in Finland. Psychiatric Services 65, 367–373.
Haukka, JK, Suvisaari, J and Lönnqvist, J (2004) Family structure and risk factors for schizophrenia: case-sibling study. BMC Psychiatry 4, 41.
Isohanni, M, Mäkikyrö, T, Moring, J, Räsänen, P, Hakko, H, Partanen, U et al. (1997) A comparison of clinical and research DSM-III-R diagnoses of schizophrenia in a Finnish national birth cohort. Clinical and research diagnoses of schizophrenia. Social Psychiatry and Psychiatric Epidemiology 32, 303–308.
Jacquemont, S, Coe, BP, Hersch, M, Duyzend, MH, Krumm, N, Bergmann, S et al. (2014) A higher mutational burden in females supports a “female protective model” in neurodevelopmental disorders. American Journal of Human Genetics 94, 415–425.
Joelsson, P, Chudal, R, Gyllenberg, D, Kesti, AK, Hinkka-Yli-Salomäki, S, Virtanen, JP et al. (2016) Demographic characteristics and psychiatric comorbidity of children and adolescents diagnosed with ADHD in specialized healthcare. Child Psychiatry and Human Development 47, 574–582.
Joelsson, P, Chudal, R, Uotila, J, Suominen, A, Sucksdorff, D, Gyllenberg, D et al. (2017) Parental psychopathology and offspring attention-deficit/hyperactivity disorder in a nationwide sample. Journal of Psychiatric Research 94, 124–130.
Jokiranta-Olkoniemi, E, Cheslack-Postava, K, Sucksdorff, D, Suominen, A, Gyllenberg, D, Chudal, R et al. (2016) Risk of psychiatric and neurodevelopmental disorders among siblings of probands with autism spectrum disorders. JAMA Psychiatry 73, 622–629.
Kieseppä, T, Partonen, T, Kaprio, J and Lönnqvist, J (2000) Accuracy of register- and record-based bipolar I disorder diagnoses in Finland; a study of twins. Acta Neuropsychiatrica 12, 106–109.
Lampi, KM, Sourander, A, Gissler, M, Niemelä, S, Rehnström, K, Pulkkinen, E et al. (2010) Brief report: validity of Finnish registry-based diagnoses of autism with the ADI-R. Acta Paediatrica 99, 1425–1428.
Larsson, H, Rydén, E, Boman, M, Långström, N, Lichtenstein, P and Landén, M (2013) Risk of bipolar disorder and schizophrenia in relatives of people with attention-deficit hyperactivity disorder. The British Journal of Psychiatry 203, 103–106.
Larsson, H, Sariaslan, A, Långström, N, D'Onofrio, B and Lichtenstein, P (2014) Family income in early childhood and subsequent attention deficit/hyperactivity disorder: a quasi-experimental study. Journal of Child Psychology and Psychiatry 55, 428–435.
Lehti, V, Cheslack-Postava, K, Gissler, M, Hinkka-Yli-Salomäki, S, Brown, AS and Sourander, A (2015) Parental migration and Asperger's syndrome. European Child and Adolescence Psychiatry 24, 941–948.
Lehti, V, Chudal, R, Suominen, A, Gissler, M and Sourander, A (2016) Association between immigrant background and ADHD: a nationwide population-based case-control study. Journal of Child Psychology and Psychiatry 57, 967–975.
Leivonen, S, Voutilainen, A, Hinkka-Yli-Salomäki, S, Timonen-Soivio, L, Chudal, R, Gissler, M et al. (2014) A nationwide register study of the characteristics, incidence and validity of diagnosed Tourette syndrome and other tic disorders. Acta Paediatrica 103, 984–990.
Liang, KY and Zeger, SL (1986) Longitudinal data analysis using generalized linear models. Biometrika 73, 13–22.
Lindblad, F, Ringbäck Weitoft, G and Hjern, A (2011) Maternal and paternal psychopathology increases risk of offspring ADHD equally. Epidemiology and Psychiatric Sciences 20, 367–372.
Margari, F, Craig, F, Petruzzelli, MG, Lamanna, A, Matera, E and Margari, L (2013) Parents psychopathology of children with attention deficit hyperactivity disorder. Research in Developmental Disabilities 34, 1036–1043.
Marín, AM, Seco, FL, Serrano, SM, García, SA, Gaviria Gómez, AM and Ney, I (2014) Do firstborn children have an increased risk of ADHD? Journal of Attention Disorders 18, 594–597.
McCoy, BM, Rickert, ME, Class, QA, Larsson, H, Lichtenstein, P and D'Onofrio, BM (2014) Mediators of the association between parental severe mental illness and offspring neurodevelopmental problems. Annals of Epidemiology 24, 629–634.
Nøvik, TS, Hervas, A, Ralston, SJ, Dalsgaard, S, Rodrigues Pereira, RLorenzo, MJ; ADORE Study Group (2006) Influence of gender on attention-deficit/hyperactivity disorder in Europe–ADORE. European Child & Adolescent Psychiatry 15(Suppl. 1), I15–I24.
Nussbaum, NL (2012) ADHD and female specific concerns: a review of the literature and clinical implications. Journal of Attention Disorders 16, 87–100.
O'Donovan, MC and Owen, MJ (2016) The implications of the shared genetics of psychiatric disorders. Nature Medicine 22, 1214–1219.
Perälä, J, Suvisaari, J, Saarni, SI, Kuoppasalmi, K, Isometsä, E, Pirkola, S et al. (2007) Lifetime prevalence of psychotic and bipolar I disorders in a general population. Archives of General Psychiatry 64, 19–28.
Pettersson, E, Larsson, H and Lichtenstein, P (2016) Common psychiatric disorders share the same genetic origin: a multivariate sibling study of the Swedish population. Molecular Psychiatry 21, 717–721.
Polanczyk, G, de Lima, MS, Horta, BL, Biederman, J and Rohde, LA (2007) The worldwide prevalence of ADHD: a systematic review and metaregression analysis. The American Journal of Psychiatry 164, 942–948.
Rhee, SH and Waldman, ID (2004) Etiology of sex differences in the prevalence of ADHD: an examination of inattention and hyperactivity-impulsivity. American Journal of Medical Genetics 127B, 60–64.
Sanchez-Gistau, V, Romero, S, Moreno, D, de la Serna, E, Baeza, I, Sugranyes, G et al. (2015) Psychiatric disorders in child and adolescent offspring of patients with schizophrenia and bipolar disorder: a controlled study. Schizophrenia Research 168, 197–203.
SAS Institute Inc. SAS (2010) Version 9.4 [computer program]. Cary, NC: SAS Institute Inc.
Sjölander, A and Greenland, S (2013) Ignoring the matching variables in cohort studies - when is it valid and why? Statistics in Medicine 32, 4696–4708.
Skoglund, C, Chen, Q, Franck, J, Lichtenstein, P and Larsson, H (2015) Attention-deficit/hyperactivity disorder and risk for substance use disorders in relatives. Biological Psychiatry 77, 880–886.
Song, J, Bergen, SE, Kuja-Halkola, R, Larsson, H, Landén, M and Lichtenstein, P (2015) Bipolar disorder and its relation to major psychiatric disorders: a family-based study in the Swedish population. Bipolar Disorders 17, 184–193.
Sucksdorff, D, Chudal, R, Suominen, A, Jokiranta, E, Brown, AS and Sourander, A (2014) Bipolar disorder and parental psychopathology. Social Psychiatry and Psychiatric Epidemiology 49, 1973–1784.
Sund, R (2012) Quality of the Finnish hospital discharge register: a systematic review. Scandinavian Journal of Public Health 40, 505–515.
Taylor, MJ, Lichtenstein, P, Larsson, H, Anckarsäter, H, Greven, C and Ronald, A (2016) Is there a female protective effect against attention-deficit/hyperactivity disorder? Evidence from Two representative twin samples. Journal of the American Academy of Child and Adolescent Psychiatry 55, 504–512.
Thapar, A, Cooper, M, Eyre, O and Langley, K (2013) What have we learnt about the causes of ADHD? Journal of Child Psychology and Psychiatry 54, 3–16.
Thomas, R, Sanders, S, Doust, J, Beller, E and Glasziou, P (2015) Prevalence of attention-deficit/hyperactivity disorder: a systematic review and meta-analysis. Pediatrics 135, e994–1001.
van Emmerik-van Oortmerssen, K, van de Glind, G, van den Brink, W, Smit, F, Crunelle, CL, Swets, M et al. (2012) Prevalence of attention-deficit hyperactivity disorder in substance use disorder patients: a meta-analysis and meta-regression analysis. Drug and Alcohol Dependence 122, 11–19.
Willcutt, EG (2012) The prevalence of DSM-IV attention-deficit/hyperactivity disorder: a meta-analytic review. Neurotherapeutics 9, 490–499.
World Health Organization (1992) International Statistical Classification of Diseases and Related Health Problems, 10th Revision. Geneva, Switzerland: World Health Organization.
Yoshimasu, K, Barbaresi, WJ, Colligan, RC, Voigt, RG, Killian, JM, Weaver, AL et al. (2012) Childhood ADHD is strongly associated with a broad range of psychiatric disorders during adolescence: a population-based birth cohort study. Journal of Child Psychology and Psychiatry 53, 1036–1043.