Serum free testosterone and asthma, asthma hospitalisations and lung function in British adults

This cross-sectional study examined the association between serum-free testosterone and asthma, current wheeze, asthma hospitalizations, and lung function in 256,419 adults enrolled in the UK Biobank study. Lung function endpoints (FEV1, FVC and FEV1/FVC ratio) were evaluated using a Vitalograph Pneumotrac 6800 spirometer.