Prevalence and Clinical Profile of Adults with ADHD Attending a Tertiary Care Hospital for Five Years
Open accessAbstract
(1) Objectives: This study aimed to assess the 5-year prevalence and clinical profile of attention deficit hyperactive disorder (ADHD) among adult patients seeking care in a tertiary care hospital in Oman. (2) Methods: The data were analysed using descriptive and inferential statistics and standardised prevalence estimates were calculated. (3) Results: Of the 39,881 hospital visits, 1.77% were made by adults with ADHD. This is equivalent to 17.8 visits per 1000 outpatients. The year 2021 saw the highest prevalence among the five years considered, while 2020 had the lowest prevalence. Although the age distribution indicated that the age group ‘under 20’ had the highest prevalence, the gender distribution showed that ADHD was more common among adult men. Among the various subtypes of ADHD, inattention was the most common. (4) Conclusions: This study specifically compared the prevalence and associated factors between an adult cohort with ADHD and those other psychiatric clinic attendees during the same period. The study offers important information on the prevalence and clinical profile of adults with ADHD in the population under consideration.
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In clinical and community samples of adults with ADHD, the combined presentation is by far the most common, accounting for roughly 63.5% of cases.
“In clinical and community samples of adults with ADHD, the combined presentation is by far the most common, accounting for roughly 63.5% of cases [89].”
From ADHD in Adulthood: Clinical Presentation, Comorbidities, and Treatment Perspectives (2025) · cites this paper as [89]
The Results (§3.6; page not supplied) say that 63.5% of cases had the inattentive subtype, not the combined presentation. The Discussion (§4) likewise says inattention predominated in this Omani hospital cohort; the study does not establish that the combined presentation predominates across clinical and community samples. (LLM, conf=0.90)
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Experimental — accuracy not yet measuredOvert hyperactivity often lessens with age, whereas inattentive symptoms become the predominant features in adult ADHD.
“this shift reflects the fact that overt hyperactivity often lessens with age, whereas inattentive symptoms (e.g., difficulty initiating tasks, sustaining concentration, forgetfulness, disorganization, lateness) become the predominant features in adult ADHD [89]”
From ADHD in Adulthood: Clinical Presentation, Comorbidities, and Treatment Perspectives (2025) · cites this paper as [89]
Results §3.6 reports that the inattentive subtype was most common among adults attending the Oman clinic (63.5%), while the hyperactive subtype was rare. The Introduction says symptoms can manifest differently in adults, but the paper does not establish that overt hyperactivity lessens with age or document the specific inattentive symptoms listed in the citing sentence. (LLM, conf=0.88)
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- Authors
- Bedawi, R. M., Al-Farsi, Y., Mirza, H., Al-Huseini, S., Al-Mahrouqi, T., Al-Kiyumi, O., Al-Azri, M., & Al-Adawi, S.
- Affiliations
- Sultan Qaboos University (OM)
- Department of Psychiatry, Al Masarra Hospital, Ministry of Health, Muscat 113, Oman
- Psychiatry Residency Program, Oman Medical Specialty Board, Muscat 130, Oman
- Department of Behavioural Medicine, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat 123, Oman
- ORCID
- Venue
- International Journal of Environmental Research and Public Health
- Publisher
- MDPI AG
- Published
- 2024-04-29
- Volume
- 21
- Issue
- 5
- Pages
- 566
- ISSN
- 1660-4601 (ISSN-L)
- PMC
- PMC11121453
- OpenAlex
- W4396567030
- Cited by
- 6
- References
- 29
- Citations by year
- 2026: 3 · 2025: 3
- FWCI
- 1.75
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- International Journal of Environmental Research and Public Health (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- Topics
- Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
- Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
- Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
- Keywords
- adult ADHD, attention deficit hyperactivity disorder, prevalence, clinical profile, gender differences, age distribution, psychiatric outpatients, tertiary care hospital, Oman
- MeSH terms
- Adolescent, Adult, Aged, Attention Deficit Disorder with Hyperactivity, Female, Humans, Male, Middle Aged, Oman, Prevalence, Young Adult, Tertiary Care Centers
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