Definition of Prevalence

Prevalence is a way to measure how common something is at a specific time. On this website, prevalence refers to the percentage or number of persons reporting that they have a disability.

The prevalence is calculated by dividing the number of people reporting a disability by the total number of people in the population.

Definition of Any Disability

The ACS definition of disability is based on six questions. A person is coded as having a disability if he or she or a proxy respondent answers affirmatively for one or more of these six categories.

  • Hearing Disability (asked of all ages): Is this person deaf or does he/she have serious difficulty hearing?
  • Visual Disability (asked of all ages): Is this person blind or does he/she have serious difficulty seeing even when wearing glasses?
  • Cognitive Disability (asked of persons ages 5 or older): Because of a physical, mental, or emotional condition, does this person have serious difficulty concentrating, remembering, or making decisions?
  • Ambulatory Disability (asked of persons ages 5 or older): Does this person have serious difficulty walking or climbing stairs?
  • Self-care Disability (asked of persons ages 5 or older): Does this person have difficulty dressing or bathing?
  • Independent Living Disability (asked of persons ages 15 or older): Because of a physical, mental, or emotional condition, does this person have difficulty doing errands alone such as visiting a doctor’s office or shopping?