Study of the Relationship Between Sleep Quality and Daytime-Nighttime Variations of Blood Pressure and Plasma Glucose Type I

The primary objectives are to compare the mean levels of the sleep quality parameters of subjects : with a nocturnal fall of the SBP (Systolic blood pressure), DBP (diastolic blood pressure) and MAP (mean arterial pressure) over of egal to 10% (dipping subjects) and of subjects with a nocturnal fall of SBP, DBP and MAP inferior to 10% (non dipper subjects). The secondary objectives are : Establish correlations between: * The quality of sleep parameters * The parameters of BP variations between the diurnal and nocturnal periods and the awake periods of sleep defined in reference to polysomnography. * The glycemia levels on 24h with a glycemic holter. The parameters of the sympathic system activation evaluated in reference to the measure of the baroreflex sensibility during the awake period.