Cumulative incidence of HTN in the participants of a prospective cohort study by Marin et al. who were not treated with CPAP. (From Marin JM, Agusti A, Villar I, Forner M, Nieto D, Carrizo SJ, Barbe F, Vicente E, Wei Y, Nieto FJ, Jelic S. Association between treated and untreated obstructive sleep apnea and risk of hypertension. JAMA : the journal of the American Medical Association. 2012;307:2169–2176.5 Used with permission).