title: Masked Hypertension in Low-Income South African Adults.
abstract: While South Africa has one of the highest hypertension rates globally, there are few data on masked hypertension (MHT) and white-coat hypertension (WCHT). This study measured the frequency of MHT and WCHT in low-income (<$500 US per month) South African adults, evaluating cardiovascular risk by arterial stiffness. Participants (n=101, 50% male; mean age 39.4±9.7 years) were recruited from a large North-West Province employer. Clinic and 24-hour blood pressure (BP) and pulse wave analysis were recorded. Clinic BP identified 18% of patients as hypertensive, while 24-hour BP showed that 63% of patients were hypertensive. The frequency of MHT was high (33 of 81, 41%) with only one case of WCHT. In comparison to those with normal clinic and 24-hour BP, augmentation index and pulse wave velocity were significantly higher in those with hypertensive 24-hour BP irrespective of clinic BP, indicating that, in this group, masked and sustained hypertension carry a similar elevated cardiovascular risk.
authors.affiliation: Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa.
authors.forename: Lisa J
authors.identifier: 0000-0002-9762-4017
authors.initials: LJ
authors.lastname: Ware
authors.affiliation: Centre for Lifespan and Chronic Illness Research, University of Hertfordshire, Hertfordshire, UK.
authors.forename: Kirsten L
authors.initials: KL
authors.lastname: Rennie
authors.affiliation: Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa.
authors.forename: Lebo F
authors.initials: LF
authors.lastname: Gafane
authors.affiliation: HIV Coordinator, North-West University, Potchefstroom, South Africa.
authors.forename: Tarryn M
authors.initials: TM
authors.lastname: Nell
authors.affiliation: Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa.
authors.forename: Jane E S
authors.initials: JE
authors.lastname: Thompson
authors.affiliation: Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa.
authors.forename: Johannes M
authors.initials: JM
authors.lastname: Van Rooyen
authors.affiliation: Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa.|MRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom, South Africa.
authors.forename: Rudolph
authors.initials: R
authors.lastname: Schutte
authors.affiliation: Hypertension in Africa Research Team (HART), North-West University, Potchefstroom, South Africa.|MRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom, South Africa.
authors.forename: Aletta E
authors.initials: AE
authors.lastname: Schutte
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D059468:Masked Hypertension / Q000453:epidemiology*; D008875:Middle Aged; D011203:Poverty; D015995:Prevalence; D013019:South Africa / Q000453:epidemiology; D059466:White Coat Hypertension / Q000453:epidemiology*