Percentage of patients with fatal cardiovascular events (CVEs) in the five groups investigated by age group (personal communication, J.M. Marin, Hospital Universitario Miguel Servet, Isabel la Catolica, Zaragoza, Spain). □: snoring; ░: mild-to moderate obst... Percentage of patients with fatal cardiovascular events (CVEs) in the five groups investigated by age group (personal communication, J.M. Marin, Hospital Universitario Miguel Servet, Isabel la Catolica, Zaragoza, Spain). □: snoring; ░: mild-to moderate obstructive sleep apnoea syndrome (OSAS); ▓: treated with continuous positive airway pressure; ▒: severe OSAS. P. Lavie Eur Respir Rev 2007;16:203-210 ©2007 by European Respiratory Society