In 1988, 36 states (including the District of Columbia) participated in the Behavioral Risk Factor Surveillance System (BRFSS). This report provides state-specific estimates of the prevalence of certain health-risk behaviors and of the delivery of clinical preventive services as measured by the BRFSS during 1988. Because estimates vary considerably from state to state, national estimates are not always suitable for states to use in planning local programs. Therefore, the BRFSS will continue to provide state-specific data about health behaviors and the use of preventive health services. These data can be used to monitor trends in health behaviors that affect the burden of chronic diseases in the United States and to assess progress toward the year 2000 objectives for the nation.