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Table 4 Univariate & Multivariate* linear regression analysis: the potential effect of various confounding factors on aortic distensibility in HIV-infected patients

From: Impaired distensibility of ascending aorta in patients with HIV infection

  Univariate Analyis Multivariate Analysis
Beta coefficient p Beta coefficient p
Age (per year) -0.007 <0.001 -0.006* <0.001
Female sex +0.04 0.20   
Total Cholesterol -0.0002 0.27   
Hemoglobin +0.01 0.44   
CD4 (+) T-cell count +0.00007 0.07   
Viral load (per 1000 copies increase) +0.00004 0.76   
AIDS -0.04 0.15   
HAART duration (months) -0.002 0.004 -0.001* 0.04
HAART (exposed vs. naïve) -0.1 0.01   
HIV duration (months) -0.0005 0.02   
  1. HIV, human immunodeficiency virus; AIDS, acquired immunodeficiency syndrome; HAART, highly active anti-retroviral therapy.
  2. Beta coefficient expresses the mean difference in distensibility. Positive sign corresponds to protective effect while minus sign to decreased distensibility.
  3. * after a stepwise, backward selection, using a p >=0.10 for variable exclusion.