Fig. 1From: The role of sleepiness on arterial stiffness improvement after CPAP therapy in males with obstructive sleep apnea: a prospective cohort studyInteraction between ESS group and time regarding cf-PWV measurements. Time: 1-before CPAP; 2- after CPAP. Sleepy group: ESS > 10; non-sleepy group: ESS ≤ 10. ESS- Epworth Sleepiness ScaleBack to article page