Morbidity and mortality benefits with statin use in observational studies on a logarithmic scale. Morbidity and mortality benefits with statin use in observational studies on a logarithmic scale. CVS: cardiovascular; COPD: chronic obstructive pulmonary disease. Data are presented as odds ratio (95% confidence interval), except hospital cohort which is presented as relative risk (95% confidence interval) and following COPD exacerbation which is presented as hazard ratio (95% confidence interval). R. P. Young et al. Eur Respir Rev 2009;18:222-232 ©2009 by European Respiratory Society