This report consolidates the most current data on selected risk factors and preventive health measures for states, the District of Columbia and Puerto Rico. The information was obtained from the data files of individual states.
All states use probability-based methods to select their sample.
All participating areas except Alaska, California, and Hawaii met this criterion in 1998. For data year 1998, eleven states used the Mitofsky-Waksberg method of sampling. Puerto Rico used a simple random sample design. The three remaining states Alaska, California, and Hawaii used other designs. Alaska Alaska's sample design is made up of three random digit-dialed strata and four listed strata, where telephone numbers are selected from a list of putative household telephone numbers.