Lipoatrophy and lipohypertrophy are independently associated with hypertension.

OBJECTIVE

Lipoatrophy and lipohypertrophy are associated with metabolic abnormalities, but little is known about their impact on hypertension. We conducted this study to determine the associations of lipoatrophy and lipohypertrophy with hypertension.

METHODS

A cross-sectional study of HIV-infected patients who completed a self-report body morphology assessment was performed. We defined hypertension as a clinical diagnosis, or a mean systolic blood pressure (BP) > 140 mmHg or diastolic BP > 90 mmHg in the previous 6 months. We used logistic regression to examine the association between hypertension and body morphology.

RESULTS

Among 347 patients, there were 2278 BP readings in 6 months. In adjusted analyses, patients with moderate lipoatrophy [odds ratio (OR) 4.3; P = 0.03] or moderate lipohypertrophy (OR 4.3; P = 0.006) had four times the odds, and patients with mild lipohypertrophy (OR 2.3; P = 0.03) had twice the odds of having hypertension compared with patients without changes. We hypothesized that the impact of lipohypertrophy on hypertension was mediated, in part, through body mass index (BMI). When BMI was included in the analysis, increased BMI was significantly associated with hypertension (OR = 1.1; P < 0.001 per kg/m(2)), and the association between lipohypertrophy and hypertension was no longer present. However, the association between moderate lipoatrophy and hypertension was strengthened (OR = 5.5; P = 0.01).

CONCLUSIONS

Lipoatrophy and lipohypertrophy are independently associated with hypertension and there is a dose-response effect with more severe lipoatrophy and lipohypertrophy. The association between lipohypertrophy (but not lipoatrophy) and hypertension appears to be mediated by BMI. Our results suggest that patient-based body morphology assessments are related to hypertension and may have potential implications for cardiovascular disease.