Limited contribution of insulin resistance and metabolic parameters to obesity-associated increases in ambulatory blood pressure in a black African community.
Int J Cardiol Hypertens
; 2: 100010, 2019 Aug.
Article
em En
| MEDLINE
| ID: mdl-33447743
ABSTRACT
Although accounting for a striking proportion of obesity effects on blood pressure (BP) in other populations, the extent to which obesity-associated increases in BP are explained by insulin resistance and metabolic changes in populations of African ancestry is uncertain. We determined the contribution of insulin resistance and associated metabolic abnormalities to variations in office or ambulatory BP in a black African community with prevalent obesity and hypertension. In 1225 randomly selected participants of black South African ancestry (age>16years, 43.1% obese, 47.4% abdominal obesity), we assessed adiposity indexes, the homeostasis model of insulin resistance (HOMA-IR) and associated metabolic abnormalities and office or ambulatory (n â= â798) BP. In separate models, waist circumference (p â< â0.0005-<0.0001) and HOMA-IR (p â< â0.51-0.005), were independently associated with office, 24 âh, day or night systolic (SBP) or diastolic (DBP) BP. However, whilst a one standard deviation increase in waist circumference translated into a 1.47-3.08 âmm Hg increased in office, 24-h SBP or DBP, in mediation analysis HOMA-IR accounted for only 0.12-0.30 âmm Hg of the impact of a one standard deviation effect of waist circumference on office, and 24-h SBP and 0.003-0.17 âmm Hg of the impact of a one standard deviation effect of waist circumference on office and 24-h DBP. In conclusion, in a black African community, insulin resistance accounts for a negligible proportion of the impact of obesity on office or ambulatory BP.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Risk_factors_studies
Idioma:
En
Revista:
Int J Cardiol Hypertens
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
África do Sul