2Several studies indicate little congruence between selfreport and biometric data, yet very few have examined the reasons for such differences. This paper contributes to the limited but growing body of literature that tracks inconsistent reports of hypertension using data from the Study on Global Ageing and Adult Health (SAGE). Focusing on five countries with different levels of development (Ghana, China, India, South Africa, and Russia), this study offers a comparative perspective that is missing in the literature. Data were obtained from wave 1 of SAGE collected in 2007/2008. A multinomial logit model was used to examine the effects of demographic and socioeconomic variables on the likelihood of respondents self-reporting that they are not hypertensive when their biometric data show otherwise. The authors also model the likelihood of respondents self-reporting that they are hypertensive when in fact their biometric data show they are not. Socioeconomic and demographic variables were shown to be significantly associated with inconsistent reporting of hypertension. For instance, it was observed that wealth was associated with a lower likelihood of selfreporting that one is not hypertensive when their biometric data indicate otherwise. Tracking such inconsistent reports is crucial to minimizing measurement errors and generating unbiased and more precise parameter estimates in hypertension research. J Clin Hypertens (Greenwich). 2015;17: 977-984. ª 2015 Wiley Periodicals, Inc.Hypertension or high blood pressure (BP) has been described as a public health crisis and a global health emergency. Related to other cardiovascular diseases, such as stroke and diabetes, hypertension has been associated with a mortality rate of approximately 7.1 million people globally.1 Measured as the ratio of systolic BP (SBP) to diastolic BP (DBP), hypertension is defined as having an SBP ≥140 mm Hg and/or a DPB value ≥90 mm Hg. Monitoring SBP (arterial BP during cardiac contraction) and DBP (arterial BP during cardiac relaxation) has become effective in the diagnosis, management, and prevention of cardiovascular diseases including hypertensive-related conditions.2 Recognized as a noncommunicable disease, BP-related conditions are endemic worldwide. 3,4 It is well-documented that the hypertension epidemic is a rapidly emerging burden of disease in low-and middle-income countries, and this is attributable to the changing demographic characteristics as well as subsequent shift in epidemiologic transitions. 5 The prevalence of hypertension in developing countries is about twice of that observed in developed countries. 6 Most alarming is that levels of awareness, treatment, and control of hypertension in low-and middle income countries are low. 7,8 Such issues of unawareness and poor control of high BP are attributed to high illiteracy levels, poor access to health facilities, and poverty. Faced with existing issues of morbidity and mortality from communicable and infectious diseases, 10 most parts of the developing world pay less attention ...