Disabilities and Health Factors
That Affect Travel
Box
National Health Interview Survey
on Disability (NHIS-D)
The NHIS-D was conducted by the National Center for Health Statistics as a supplement to the National Health Interview Survey, a nationally representative sample survey. The NHIS-D 1994–1995 was conducted in two phases. Phase 1 included a sample of approximately 203,000 individuals who were interviewed in 1994 and 1995. About 34,000 adults and children (20,000 in 1994 and 14,000 in 1995) indicated some form of disability, yielding a nationally representative estimate of about 42 million disabled adults in the household population (excluding people in long-term care facilities and prisons).
In phase 2, adults and children who indicated they had a disability in phase 1 were reinterviewed over a period stretching from 1994 to 1997 using two different questionnaires. Adults were asked for more detailed information on a range of subjects including 12 transportation questions in one section. Some questions in other sections of the interview also included transportation components. Data are based on a sample and subject to sampling variability.