Relationship between neck circumference and hypertension in the National Hypertension Registry (the RENATA study)

José Alfie, Mónica Diaz, Paula Cufaro, Pablo Rodríguez, Guillermo Fábreguez, Rodolfo Magni, Sandra Nucci, Militza Rodríguez, Marcos J. Marín

Abstract


Background

Hypertension (HT) is associated with a greater proportion of body fat. Neck circumference might provide additional clinical information to other measurements of body fat.

Objective

The aim of this study was to compare the relationship between abdominal and neck obesity and hypertension.

Methods

In the RENATA study, 4006 adults from seven cities (Buenos Aires, Córdoba, Tucumán, Mendoza, Resistencia, Corrientes and Neuquén) were randomly selected. Neck and waist circumferences were measured in 3987 subjects. Abdominal obesity (AO) was defined following the ATP III recommendations and neck obesity (NO) was considered as the upper tertile of neck circumference (³35 cm in women and ³41 cm in men). Hypertension was defined as average blood pressure measurements ³140 and/or 90 mm Hg or use of antihypertensive drug therapy.

Results

In patients with normal abdominal adipose tissue, the prevalence of HT was 20.3% with normal neck circumference vs. 38.8% with NO, while in subjects with AO, the prevalence of HT was 43.7% with normal neck circumference vs. 57.4% with NO (chi square, p <0.001). Logistic regression analysis showed that, for each standard deviation of neck circumference, the risk of HT adjusted for age and gender was greater in the absence than in the presence of AO (67% vs. 17%; p <0.001).

Conclusions

The prevalence of HT was greater in subjects with obesity in both regions of the body. The association between neck circumference and the prevalence of HT was greater in subjects with normal waist circumference.


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Revista argentina de cardiología. ISSN en línea 1850-3748. Argentine journal of cardiology (English ed. Online ISSN 2314-2286) Sociedad Argentina de Cardiología. Azcuénaga 980 (C1115AAD),Ciudad Autónoma de Buenos Aires, República Argentina. Tel. (54 11) 4961-6027/8/9 Fax: 4961-6020 www.sac.org.ar revista@sac.org.ar