DATA SOURCE: Family Core component of the January-September 2001 National Health Interview Survey.

NOTES: A person was defined as uninsured if he or she did not have any private health insurance, Medicaid, State-sponsored or other government-sponsored health plan, Medicare, or military health plan at the time of the interview. A person was also defined as uninsured if he or she had only Indian Health Service coverage or had only a private plan that paid for one type of service such as accidents or dental care. The analysis excluded persons with unknown health insurance status (about 1% of respondents). The data on health insurance status were cleaned and edited using an automated system based on logic checks and keyword searches. For comparability, the estimates for all years were created using these same procedures. The resulting estimates of persons not having health insurance coverage are generally 0.1% lower than those based on manual editing procedures used for the final data files. The number of uninsured was calculated as the percent of uninsured multiplied by the total population including persons with unknown coverage. The age-specific numbers of uninsured may not add to their respective totals due to rounding error.