The demographics of disability

Area of Science:

• Public Health
• Disability Studies
• Health Economics

Background:

• Disability measurement varies across surveys, leading to disparate population estimates.
• The definition of disability significantly impacts the population covered by the Americans with Disabilities Act (ADA).
• Multiple perspectives, including researchers, advocates, and self-perceptions, shape the understanding of disability.

Purpose of the Study:

• To clarify differing estimates and measurement methods for disability.
• To analyze the implications of definitional issues on ADA population coverage.
• To explore the extent of discrimination and employment challenges faced by individuals with disabilities.

Main Methods:

• Review of various perspectives on disability (researchers, advocates, self-perception).
• Comparison of different definitions and their impact on activity limitations.
• Analysis of available survey data on employment desires, unemployment causes, and discrimination experiences.

Main Results:

• At least 36 million Americans (over 14%) experience limitations in selected activities.
• ADA coverage could be significantly larger depending on the definition of 'major life activities'.
• Up to 66% of unemployed individuals with activity limitations desire employment; discrimination is a factor for many.

Conclusions:

• Chronic diseases are more frequent causes of disability than physical/sensory impairments.
• Disability prevalence and ADA impact vary geographically and are influenced by socioeconomic factors.
• Assessing the ADA's impact is challenging due to definitional ambiguity and limited data on discrimination.