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EpiCast Report: Attention-Deficit/Hyperactivity Disorder – Epidemiology Forecast to 2024

Attention-deficit/hyperactivity disorder (ADHD) is a common childhood disorder that can continue through adolescence and adulthood. Symptoms include higher than normal levels of impulsivity and inattention that impair an individual's ability to function properly in various settings like school or work. Studies show a greater number of boys being diagnosed with ADHD compared with girls, with male to female ratios reported to range from 3:1 to 9:1, dependent on the study setting (general population or clinics). There are three distinct subtypes of ADHD: predominantly inattentive type (ADHD-I), predominantly hyperactive-impulsive type (ADHD-H), and combined type (ADHD-C). Common comorbidities include learning disabilities, oppositional defiant disorder, conduct disorder, obsessive compulsive disorder, tic disorders, substance use disorders, anxiety disorders, bipolar disorder, and depression. Genetic studies have conclusively demonstrated that genetic influences play a role in the etiology of ADHD.

GlobalData epidemiologists forecast the diagnosed prevalent cases of ADHD in the 7MM to grow by 2.86% per year over the next 10 years, from 26,540,792 cases in 2014 to 34,129,001 cases in 2024. In the 7MM, the US will have the highest number of diagnosed prevalent cases throughout the forecast period, with 21,217,302 cases in 2014 and 28,833,163 cases in 2024. In the 7MM, the age group 18 years and older had the highest number of diagnosed prevalent cases of ADHD in 2014, contributing 18,870,635 cases, consisting of 71.10% of the total. Across the 7MM, the diagnosed prevalent cases of ADHD are higher in men compared to women, with 17,153,298 (64.63%) cases occurring in men and 9,387,494 (35.37%) cases occurring in women in 2014. The ADHD subtype in children and adolescents with the highest number of diagnosed prevalent cases was ADHD-I, with 3,175,915 cases or 41.43% of the total in the 7MM in 2014, while the ADHD subtype in adults with the highest number of diagnosed prevalent cases was ADHD-C, with 10,770,130 cases or 57.07% of the total.

GlobalData epidemiologists utilized comprehensive, country-specific data from registries and peer-reviewed journal articles to arrive at a meaningful, in-depth analysis and forecast for the diagnosed prevalent cases of ADHD. In this analysis, GlobalData epidemiologists provide detailed, clinically relevant segmentations for the diagnosed prevalent cases of ADHD. Furthermore, the use of uniform methodology across markets allows for meaningful global comparisons of the diagnosed prevalent cases of ADHD.

Scope

The Attention-Deficit/Hyperactivity Disorder (ADHD) EpiCast Report and EpiCast Model provide an overview of the risk factors and global trends of ADHD in the 7MM (US, France, Germany, Italy, Spain, UK, and Japan). It includes a 10-year epidemiology forecast of ADHD diagnosed prevalent cases segmented by age group (3–5 years, 6–12 years, 13–17 years, and 18 years and older), sex, disease subtype, and comorbid disorder in these seven markets.

The ADHD epidemiology report and model were written and developed by Masters- and PhD-level epidemiologists.

The EpiCast Report is in-depth, high quality, transparent and market-driven, providing expert analysis of disease trends in the 7MM.

The EpiCast Model is easy to navigate, interactive with dashboards, and epidemiology-based with transparent and consistent methodologies. Moreover, the model supports data presented in the report and showcases disease trends over a 10-year forecast period using reputable sources.

Table of Contents

1Table of Contents

1.1List of Tables

1.2List of Figures

2Epidemiology

2.1Disease Background

2.2Risk Factors and Comorbidities

2.3Global Trends

2.3.1US

2.3.25EU

2.3.3Japan

2.4Forecast Methodology

2.4.1Sources Used Tables

2.4.2Forecast Assumptions and Methods

2.4.3Sources Not Used

2.5Epidemiological Forecast for ADHD (2014–2024)

2.5.1Diagnosed Prevalent Cases of ADHD

2.5.2Age-Specific Diagnosed Prevalent Cases of ADHD

2.5.3Sex-Specific Diagnosed Prevalent Cases of ADHD

2.5.4Age-Standardized Prevalence of ADHD

2.5.5Diagnosed Prevalent Cases of ADHD by Subtype

2.6Discussion

2.6.1Epidemiological Forecast Insight

2.6.2Limitations of the Analysis

2.6.3Strengths of the Analysis

3Appendix

3.1Bibliography

3.2About the Authors

3.2.1Epidemiologists

3.2.2Managing Epidemiologists

3.2.3Global Director of Therapy Analysis and Epidemiology

3.3About GlobalData

3.4About EpiCast

3.5Contact Us

3.6Disclaimer

List of Tables

Table 1: Risk Factors and Comorbidities for ADHD

Table 2: 7MM, Sources of Epidemiological Data Used to Forecast Diagnosed Prevalent Cases of ADHD

Table 3: 7MM, Sources of Epidemiological Data Used to Forecast Diagnosed Prevalent Cases of ADHD by Subtype, Ages 3?17 Years

Table 4: 7MM, Sources of Epidemiological Data Used to Forecast Diagnosed Prevalent Cases of ADHD by Subtype, Ages =18 Years

Table 5: 7MM, Sources Not Used in Epidemiological Analysis of ADHD

Table 6: 7MM, Diagnosed Prevalent Cases of ADHD, Both Sexes, Ages =3 Years, Select Years, 2014–2024

Table 7: 7MM, Age-Specific Diagnosed Prevalent Cases of ADHD, Both Sexes, N (Row%), 2014

Table 8: 7MM, Sex-Specific Diagnosed Prevalent Cases of ADHD, Ages =3 Years, N (Row %), 2014

Table 9: 7MM, Diagnosed Prevalent Cases of ADHD, by Subtype, Ages 3–17 Years, Children and Adolescents, N (Row %), 2014

Table 10: 7MM, Diagnosed Prevalent Cases of ADHD, by Subtype, Ages =18 Years, Adults, N (Row %), 2014

List of Figures

Figure 1: 7MM, Diagnosed Prevalent Cases of ADHD, Both Sexes, Ages =3 Years, Selected Years, 2014–2024

Figure 2: 7MM, Age-Specific Diagnosed Prevalent Cases of ADHD, Both Sexes, 2014

Figure 3: 7MM, Sex-Specific Diagnosed Prevalent Cases of ADHD, Ages =3 Years, 2014

Figure 4: 7MM, Age-Standardized Diagnosed Prevalence of ADHD, Ages =3 Years , 2014

Figure 5: 7MM, Diagnosed Prevalent Cases of ADHD, by Subtype, Ages 3–17 Years, Children and Adolescents, N, 2014

Figure 6: 7MM, Diagnosed Prevalent Cases of ADHD, by Subtype, Ages =18 Years, Adults, N, 2014

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