Attention-deficit/hyperactivity disorder (ADHD) is often perceived as a childhood condition, yet it is a lifelong neurodevelopmental condition that many carry into adulthood (Faraone et al., 2006). ADHD affects approximately 2%-5% of adults globally (Staley et al., 2023). For those diagnosed as adults, the challenges and implications can differ significantly from individuals who receive a childhood diagnosis. Understanding these challenges is important for fostering awareness and tailored support.
Challenges of ADHD in Adults
Adults with ADHD frequently encounter issues in various aspects of their lives, including employment, relationships, and daily functioning. These challenges often stem from difficulties with organisation, time management, distractibility, and maintaining focus. In professional settings, ADHD traits such as distractibility and hyperfocus can lead to inconsistent performance, with some excelling in tasks they find engaging but struggling with mundane responsibilities. Difficulties with executive function, such as controlling impulsive behaviour, initiating tasks, and prioritising effectively, can hinder an individual’s performance, especially when deadlines, multitasking, and long-term planning are critical (Kooij et al., 2019).
Adults with ADHD may also feel misunderstood or judged for behaviours such as interrupting conversations or appearing inattentive, which can lead to chronic low self-esteem. Difficulty managing frustration may further strain relationships. These experiences often culminate in feelings of inadequacy. Additionally, adults with ADHD are more likely to experience comorbid conditions such as anxiety and depression, which exacerbate the difficulties they face. (Asherson et al., 2012; Kooij et al., 2019).
Social stigma also poses a significant barrier. Many adults report feelings of being misunderstood or dismissed, particularly in professional settings where hyperactivity or inattention might be misinterpreted as incompetence or a lack of discipline (Asherson et al., 2012). Late diagnosis further amplifies these challenges, as individuals may have spent years without understanding their behaviours or receiving appropriate support.
Implications of a Late Diagnosis
Being diagnosed with ADHD as an adult carries emotional and practical implications compared to a childhood diagnosis. Adults often experience relief upon receiving a diagnosis, as it provides an explanation for years of struggles. For example, recognising ADHD as the root cause of procrastination or impulsivity can empower individuals to adopt effective coping strategies. However, they may also experience feelings of regret over missed opportunities or self-blame for past difficulties (Almekhlafi & Jain, 2024).
Late diagnosis can limit access to early interventions that improve coping mechanisms, leaving individuals less equipped to manage their symptoms. For example, adults diagnosed later may not have benefited from academic accommodations or behavioural interventions during their formative years, leading to an accumulation of challenges that persist into adulthood. In addition, accessing therapy or medication later in life means symptoms may have caused prolonged disruptions in relationships or career trajectories. It can also be challenging to integrate a neurodevelopmental condition into one’s self-identity after years of misunderstanding one’s behaviours.
Gender Differences in ADHD Diagnosis
Gender differences in ADHD diagnosis are well-documented. Boys are typically diagnosed more frequently than girls during childhood, largely due to differences in symptom presentation. While boys more often exhibit externalising behaviours like hyperactivity, girls tend to display inattentive symptoms, which are less disruptive and therefore more likely to be overlooked (Martin et al., 2024). This diagnostic bias contributes to the underdiagnosis of ADHD in females, a trend that persists into adulthood.
Women with ADHD often face unique challenges. Research indicates that they are more likely to be diagnosed later in life, often due to comorbid conditions such as anxiety or depression overshadowing ADHD symptoms. Women with ADHD may also internalise their struggles, leading to self-blame, feelings of low self-esteem and higher rates of emotional distress compared to their male counterparts (Almekhlafi & Jain, 2024).
ADHD Awareness and Prevalence in Singapore
There is limited research on the prevalence of ADHD in Singapore, reflecting a relatively low awareness of ADHD compared to Western countries. Although comparable Singapore-specific data is lacking, a Chinese study estimated the prevalence to be 6.5% in Mainland China and 4.2% in Taiwan (Liu et al., 2018). These findings offer valuable regional context.
Cultural factors, such as misconceptions or stigma surrounding mental health, may contribute to underdiagnosis and underreporting. Many adults may remain undiagnosed due to the myth that ADHD only affects children or stems from poor discipline. Local organisations such as Spark and Unlocking ADHD are working on improving this, providing resources and support groups for children and adults with ADHD. These initiatives aim to reduce stigma, educate the public, and foster community for individuals navigating the complexities of the condition.
The Way Forward
An ADHD diagnosis in adults reveals a complex set of challenges, including executive dysfunction, distractibility, emotional regulation difficulties, and stigma, underscoring the need for greater public awareness and supportive interventions. For individuals diagnosed in adulthood, the experience can evoke both relief and regret. In Singapore, efforts to reduce stigma and provide accessible resources are essential for supporting adults with ADHD, enabling them to thrive in both personal and professional settings. In addition, public health campaigns and professional training for clinicians can help address misconceptions and promote timely recognition of ADHD symptoms in adults, facilitating earlier diagnosis and intervention.
- Written by Isak Spitalen
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References:
Almekhlafi, K. & Jain, S. (2024). Unveiling Gender Disparities in ADHD: A Literature Review on Factors and Impacts of Late Diagnosis in Females (2010-2023). Journal of Woman’s Mental Health, 1(1), 9-21. https://openaccesspub.org/womans-mental-health/article/2125
Asherson, P., Akehurst, R., Kooij, J. J., Huss, M., Beusterien, K., Sasané, R., Gholizadeh, S., & Hodgkins, P. (2012). Under Diagnosis of Adult ADHD: Cultural Influences and Societal Burden. Journal of Attention Disorders, 16(5), 20–38. https://doi.org/10.1177/1087054711435360
Faraone, S. V., Biederman, J., & Mick, E. (2006). The Age-Dependent Decline of Attention Deficit Hyperactivity Disorder: A Meta-Analysis of Follow-Up Studies. Psychological Medicine, 36(2), 159–165. https://doi.org/10.1017/S003329170500471X
Kooij, J. J. S., Bijlenga, D., Salerno, L., Jaeschke, R., Bitter, I., Balázs, J., … Asherson, P. (2019). Updated European Consensus Statement on Diagnosis and Treatment of Adult ADHD. European Psychiatry 56(1), 14-34. https://doi.org/10.1016/j.eurpsy.2018.11.001
Liu A., Xu Y., Yan, Q., & Tong, L. (2018). The Prevalence of Attention Deficit/Hyperactivity Disorder among Chinese Children and Adolescents. Scientific reports, 8(1), 11169. https://doi.org/10.1038/s41598-018-29488-2
Martin, J., Langley, K., Cooper, M., Rouquette, O. Y., John, A., Sayal, K., Ford, T. & Thapar, A. (2024). Sex Differences in Attention-Deficit Hyperactivity Disorder Diagnosis and Clinical Care: A National Study of Population Healthcare Records in Wales. Journal of Child Psychology and Psychiatry, 65, 1648-1658. https://doi.org/10.1111/jcpp.13987
Staley, B. S., Robinson, L. R., Claussen, A. H., et al. (2023). Attention-Deficit/Hyperactivity Disorder Diagnosis, Treatment, and Telehealth Use in Adults. Morbidity and Mortality Weekly Report 73(40), 890–895. http://dx.doi.org/10.15585/mmwr.mm7340a1