Objective Declining mean systolic and diastolic blood pressures were observed in most populations of the World Health Organization MONICA (monitoring trends and determinants in cardiovascular disease) project from the mid-1980s to mid-1990s. We tested whether pooled results would show mean change associated with decline in high readings only, resulting from better antihypertensive medication, or with similar falls in low, middle, and high readings, implying other causes.
Tunstall-Pedoe, H., Connaghan, J., Woodward, M., Tolonen, H., & Kuulasmaa, K. (2006). Pattern of declining blood pressure across replicate population surveys of the WHO MONICA project, mid-1980s to mid-1990s, and the role of medication. BMJ, 332(7542), 629-632. https://doi.org/10.1136/bmj.38753.779005.BE