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Short Communication: The Effect of Rosuvastatin on Vascular Disease Differs by Smoking Status in Treated HIV Infection.

Smoking is an important contributor to cardiovascular disease risk and is highly prevalent in the HIV population. In the Stopping Atherosclerosis and Treating Unhealthy Bone with Rosuvastatin in HIV trial (SATURN-HIV), a 96-week, randomized placebo-controlled study testing the effect of rosuvastatin on subclinical vascular disease and immune activation in HIV-infected adults, rosuvastatin improved immune activation and arrested common carotid artery intima media thickness (CCA IMT) progression. In this exploratory analysis, ANOVA was used to test for effect modification by smoking. One-hundred forty-seven adults were included (72 in rosuvastatin group; 75 in placebo group). Groups were similar at baseline. Overall, mean ± SD age was 45.4 ± 9.9 years, 115 (78%) were men and 100 (68%) were African American. Ninety-three (63%) were current smokers (mean ± SD 0.6 ± 0.44 packs/day) and another 24 (16%) were smokers in the past. There were statistically significant randomization group by smoking status interactions for 0-24 (p = .01) and 0-48 (p < .01) week changes in proportion of activated CD4+ T cells and for 0-48 (p < .01) and 0-96 (trend only; p = .06) week changes in CCA IMT. No effect modification by smoking was detected for changes in markers of inflammation or monocyte activation. The beneficial effect of rosuvastatin on CCA IMT was not apparent in smokers although T cell activation improved to a greater degree in this subgroup.