Sample surveys contain information specific to individual patients and provider visits.
Sentinel centers are selected sites which provide data for timely investigation of program or policy issues. Special studies are data collected on a one-time basis in order to answer specific questions regarding health care access and disparities. BPHC State Profiles are based on 1999 UDS data as well as data from CDC and the U.S. Census Bureau. The 1995 User Visit Survey , which is currently being updated, compares patients served by community health centers to those served by other providers or to people nationally. The Year 2000 Survey will enable comparisons with national survey data to measure disparity reduction.