A minimum follow-up of 5 years has been established. During the follow-up, an annually programmed visit will be carried on to all patients, collecting variables from subjects' interview in the office.The baseline and follow-up variables will be collected using questionnaires.
The variables that will be collected are:
BP variables; Anthropometric variables; Compliance with CPAP in the case of CPAP-treated OSA patients; blood samples extraction; outcomes (heart disease, cerebrovascular disease, kidney disease, vascular disease). All the cardiovascular events will be independently evaluated by two doctors to establish a diagnostic. In case of discordance a third external doctor will assess the case. The date of each event will be recorded.