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The prevalence and workplace costs of adult attention deficit hyperactivity disorder in a large manufacturing firm

Published online by Cambridge University Press:  21 April 2008

R. C. Kessler ,
M. Lane ,
P. E. Stang  and
D. L. Van Brunt
R. C. Kessler*
Affiliation:
Department of Health Care Policy, Harvard Medical School, Boston, MA, USA
M. Lane
Affiliation:
Department of Health Care Policy, Harvard Medical School, Boston, MA, USA
P. E. Stang
Affiliation:
Institute for Primary Care Research, Blue Bell, PA, USA
D. L. Van Brunt
Affiliation:
Eli Lilly and Company, Indianapolis, IN, USA
*
*Address for correspondence: R. C. Kessler, Ph.D., Department of Health Care Policy, Harvard Medical School, 180 Longwood Avenue, Boston, MA 02115, USA. (Email: [email protected])
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Abstract

Background

Little is known about the effects of adult attention deficit hyperactivity disorder (ADHD) on work performance or accidents-injuries.

Method

A survey was administered in 2005 and 2006 to employees of a large manufacturing firm to assess the prevalence and correlates of adult ADHD. Respondents (4140 in 2005, 4423 in 2006, including 2656 in both surveys) represented 35–38% of the workforce. ADHD was assessed with the World Health Organization (WHO) Adult ADHD Self-Report Scale (ASRS), a validated screening scale for DSM-IV adult ADHD. Sickness absence, work performance and workplace accidents-injuries were assessed with the WHO Health and Work Performance Questionnaire (HPQ).

Results

The estimated current prevalence (standard error) of DSM-IV ADHD was 1.9% (0.4). ADHD was associated with a 4–5% reduction in work performance (χ12=9.1, p=0.001), a 2.1 relative-odds of sickness absence (χ12=6.2, p=0.013), and a 2.0 relative-odds of workplace accidents-injuries (χ12=5.1, p=0.024). The human capital value (standard error) of the lost work performance associated with ADHD totaled US$4336 (676) per worker with ADHD in the year before interview. No data were available to monetize other workplace costs of accidents-injuries (e.g. destruction of equipment). Only a small minority of workers with ADHD were in treatment.

Conclusions

Adult ADHD is a significantly impairing condition among workers. Given the low rate of treatment and high human capital costs, in conjunction with evidence from controlled trials that treatment can reduce ADHD-related impairments, ADHD would seem to be a good candidate for workplace trials that evaluate treatment cost-effectiveness from the employer's perspective.

Keywords

ADHDadult ADHDcosts of illnessepidemiologyproductivityHealth and Work Performance Questionnaire (HPQ)workplace costs of illness
Type
Original Articles
Information
Psychological Medicine , Volume 39 , Issue 1 , January 2009 , pp. 137 - 147
Copyright
Copyright © 2008 Cambridge University Press

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