Objectives
The aim of the study was to describe chronic lung disease in HIVâinfected neverâsmokers by looking at clinical, structural and functional abnormalities.
Methods
This comparative crossâsectional study included 159 HIVâinfected neverâsmoking patients [mean (± standard deviation) age 54.6 ± 9.1 years; 13.2% female; 98.1% with undetectable viral load] and 75 nonmatched neverâsmoking controls [mean (± standard deviation) age 52.6 ± 6.9 years; 46.7% female]. We examined calcium scoring computer tomography (CT) scans or chest CT scans, all with a lungâdedicated algorithm reconstruction, to assess emphysema and airway disease (respiratory bronchiolitis and/or bronchial wall thickening), tested pulmonary function using spirometry, lung volumes and the diffusion lung capacity of carbon monoxide (DLCO), and assessed respiratory symptoms using the Chronic Obstructive Pulmonary Disease (COPD) Assessment Test (CAT).
Results
Twentyâfive (17.2%) of the HIVâinfected patients versus two (2.7%) of the controls had a CAT score >Â 10. Only 5% of the HIVâinfected patients showed FEV1% <Â 80%, and 25% had DLCO <Â 75% of the predicted value. Based on the CT scans, they had increased prevalences, compared with the controls, of airway disease (37% versus 7.9%, respectively) and emphysema (18% versus 4%, respectively), with more severe and more frequent centrilobular disease. After correction for age, sex and clinical factors, HIV infection was significantly associated with CAT >Â 10 [odds ratio (OR)Â 7.7], emphysema (ORÂ 4), airway disease (ORÂ 4.5) and DLCO <Â 75% of predicted (ORÂ 4).
Conclusions
Although comparisons were limited by the different enrolment methods used for HIVâinfected patients and controls, the results suggest that neverâsmoking HIVâinfected patients may present with chronic lung damage characterized by CT evidence of airway disease. A minority of them showed respiratory symptoms, without significant functional abnormalities.