Health disparities or data disparities: sampling issues in hepatitis B Virus infection among Asian American Pacific Islander studies.

Hepatitis B virus (HBV) infection in Asian American Pacific Islanders (AAPIs) is an important health problem that must be recognized and addressed by the U.S. public health policy. However, AAPIs have been to a large degree invisible in public health data and debates and their interests have been disregarded. Moreover, an estimation of HBV infection rates reported from the National Nutritional and Health Survey Examinations III was 1.25 million; however, an estimate based on AAPI-targeted studies places the number at almost 2 million. This article discusses the perils of application of textbook methods of sampling coverage, selection, and nonresponse in studies related to AAPIs and the importance to note that some rapidly increasing racial/ethnic groups such as AAPIs have linguistic and cultural differences and these differences often cause such groups to be omitted from data collection.