• Magalí Blanco, Glenda Ernst, Stella Valiensi, Elda Berrozpe, Oscar Martínez, and Eduardo Borsini.
• Unidad de Sueño y Ventilación, Hospital Británico de Buenos Aires, Argentina. E-mail: blanco.magali@hotmail.com.
• Medicina (B Aires). 2020 Jan 1; 80 (4): 317-323.

AbstractPolysomnography without real-time technical supervision (sleep test level II) h as been described with adequate quality of neurological and respiratory signals. We compare the efficiency and quality of sleep in hospitalized patients and in the sleep laboratory. The study was retrospective, in a consecutive sample of systematic collection based on PSG level II. We include 486 patients: 156 hospitalized and 330 outpatients; 94 men (60.2%) vs. 181 (55%); age: 67.5 ± 12.8 vs. 59.3 ± 14.7 years, p < 0.001; body mass index (kg/m2): 29.5 ± 6.3 vs. 29.7 ± 6.3, p: 0.8. The rate of apneas and hypopneas per sleep hour (AHI in ev/h) was: 20.8 (8.3-42.5) vs. 12.1 (4.8-26.23), p < 0.01; mild obstructive sleep apnea (OSA): 30 (19.2%) vs. 104 (31.5%) p < 0.05 and severe OSA: 62 (37.2%) vs. 64 (18.9%), p < 0.0001. The hospitalized population showed greater severity by AHI (p < 0.01). Total sleep time and mean efficiency (%) were lower in hospitalized: 231 minutes vs. 304, p < 0.0001 and 63.7 vs. 76.8, p < 0.001. A small proportion had a normal efficiency (> 80% of total sleep time), being higher in outpatients: 41.5 vs. 22.5 p < 0.001. Finally, in those with total sleep time > 3 hours, the efficiency (%) was lower in hospitalized: 73.3 (60.8-82.1) vs. 78.5 (67.1-86.2), p < 0.01. In hospitalized patients the quality and efficiency of sleep were lower with a small proportion of patients sleeping four hours during a polysomnography test.

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