 This systematic review found that socio-demographic factors such as age, gender, education level, and income played a minor role compared to other factors such as health system resources and processes, knowledge and beliefs about hypertension, social relationships and traditions, and trade-offs with family priorities. The authors concluded that context matters when it comes to hypertension control, and that understanding the changing barriers to hypertension control along the patient journey is necessary to develop a comprehensive and efficient response to this persisting problem. This article was authored by Rachel Brathwaite, Eleanor Hutchinson, Martin McKee, and others.