Figure 1.

Flow chart of the patients during the study. In branch A, 27 patients we subjected to the 3 nights of type 3 portable monitoring at home (3N-PM) first. One patient was lost (during the 3 nights the oxymeter signal was not recorded), and one study was missed (during the first night the oxymeter signal was not recorded). The polysomnography (PSG) was then performed in 26 patients. In branch B, 29 patients received PSG first. When the 3N-PM were performed in this group, six studies were invalidated: two studies during night 1 (one recording of less than 180 min and another with no recording); one, during night 2 (no recording); and three during night 3 (two recording of less than 180 min and another unperformed by the patient).