Open AccessMasked Hypertension in Low‐Income South African Adults
Author(s) -
Ware Lisa J.,
Rennie Kirsten L.,
Gafane Lebo F.,
Nell Tarryn M.,
Thompson Jane E.S.,
Van Rooyen Johannes M.,
Schutte Rudolph,
Schutte Aletta E.
Publication year - 2016
Publication title -
the journal of clinical hypertension
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.909
H-Index - 67
eISSN - 1751-7176
pISSN - 1524-6175
DOI - 10.1111/jch.12768
Subject(s) - medicine , blood pressure , arterial stiffness , masked hypertension , pulse wave velocity , white coat hypertension , cardiology , ambulatory blood pressure
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.