Gordon NP, et al. - Using a cohort of 1.4 million adults (aged 45 to 84) who were Kaiser Permanente Northern California health plan members during 2016, researchers assessed how prevalence of diabetes mellitus, hypertension, coronary artery disease, obesity, and smoking and risk factors varies across Asian-American and PI ethnic groups and compares with an aggregated All Asian-American racial group. The sample consisted of nearly 274,910 Asian-Americans (Chinese, Filipino, Japanese, Korean, Southeast Asian, South Asian, other), 8450 PIs, 795,080 non-Hispanic whites, 107,200 blacks, and 210,050 Latinos. According to findings, substantive differences were found in the prevalence of chronic cardiovascular conditions, obesity, and smoking across Asian-American ethnic groups and between Asian-American ethnic groups and an aggregated All Asian racial group in a population of middle-aged and older adult Northern California health plan members. The investigation verifies that statistics reporting for an aggregated Asian-American racial group masks significant differences in the health of the Asian-American ethnic group.