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ADHD Statistics

How common is ADHD?

This page provides important data on the prevalence of ADHD. Stay informed on the latest statistics and trends related to ADHD.

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ADHD Global Prevalence

ADHD is a common neurodevelopmental disorder affecting children and adults, with a global prevalence of approximately 7% and 2%, respectively.

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Children with ADHD

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Adult with ADHD

ADHD Hong Kong Prevalence

The prevalence of ADHD in Hong Kong is estimated to be 6.4% in children and adolescents and approximately 2.5% in adults, similar to the global prevalence.

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Adult with ADHD

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Children with ADHD

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Estimate Hong Kong ADHD Population

Based on the prevalence of ADHD in Hong Kong, the estimated ADHD population in Hong Kong is 210,790. This includes children, adolescents, and adults with ADHD, which is more than the population of the Wan Chai district. It is, therefore, crucial to give attention and provide more resources and support to individuals with ADHD.

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210,790

Children, Adolescents & Adults

38,200

2021 Census and Statistics

Department record

Hong Kong Population (2022) :

Children and adolescents (age 5 -19 years) = 833,400

Adult (over age 20 years) = 6,298,100

Wan Chai Council district population (2021) : 165,100

Estimate ADHD population:

Children and adolescents (age 5 -19 years) = 833,400 x 6.4% = 53,338

Adult (over age 20 years) = 6,298,100 x 2.5% = 157,452

ADHD population: 53,338 + 157,452 = 210,790

Estimate Hong Kong ADHD Population

(under 19 years old)

The estimated prevalence of ADHD in children and adolescents in Hong Kong is 6.4%.

Based on the population of Hong Kong at the end of 2022, this translates to approximately 53,338 individuals.

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Estimate ADHD population:

Children and adolescents (age 5 -19 years) = 833,400 x 6.4% = 53,338

Estimate Hong Kong ADHD Population

(over 20 years old)

Adult ADHD is often overlooked, and only those diagnosed with the disorder receive attention. However, a large population of adults in Hong Kong may have undiagnosed ADHD.

 

Based on recent estimates, Hong Kong's adult population over 20 is approximately 6,298,100. Of this population, it is estimated that 6.8%, or 428,270 individuals, exhibit symptoms of ADHD. Additionally, an estimated 2.5% of adults, or 157,452 individuals, are likely to have ADHD.

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428,270

(Estimated symptomatic

Adult ADHD Population)

157,452

(Estimated Adult with

ADHD Population)

6,298,100

(Adult Population)

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2.5%

of population

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6.8%

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100%

of population

of population

Hong Kong Population (2022) :

Adult (over age 20 years) = 6,298,100

ADHD Symptoms Can Persist Into Adulthood

It was previously believed that ADHD only occurred in children and would disappear as they grew up. However, recent studies have found that around 65% of people with ADHD will continue to experience symptoms into adulthood.

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65%

Reference:

  1. Thomas R, Sanders S, Doust J, Beller E, Glasziou P. Prevalence of attention-deficit/hyperactivity disorder: a systematic review and meta-analysis. Pediatrics. 2015;135(4):e994-1001.

  2. Song P, Zha M, Yang Q, Zhang Y, Li X, Rudan I. The prevalence of adult attention-deficit hyperactivity disorder: A global systematic review and meta-analysis. J Glob Health. 2021;11:04009

  3. University of Hong Kong. (2023, March 29). HKU researchers develop new method to detect early-stage Alzheimer’s disease [Press release]. Retrieved from https://www.hku.hk/press/press-releases/detail/18423.html

  4. Wang, Y., Chen, R., Hu, H., & Yan, Y. (2018). Prevalence of depression and depressive symptoms among outpatients: A systematic review and meta-analysis. The Lancet Psychiatry, 5(6), 498-510. https://doi.org/10.1016/S2215-0366(18)30293-1

  5. Hong Kong Monthly Digest of Statistics - Population. Census and Statistics Department. Available at https://www.censtatd.gov.hk/en/web_table.html?id=110-01001 [Accessed 30 Mar. 2023].

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