Patients' estimates of their sleep times: reliability and impact on diagnosis of obstructive sleep apnoea

• DOI: 10.1111/imj.12798
• Publication Date: 2015-05-06T06:47:15Z
• Authors: Y. H. Khor; J. Tolson; T. Churchward; P. Rochford; C. Worsnop
• Keywords: Sleep

Home polysomnography (PSG) is an alternative method for diagnosis of obstructive sleep apnoea (OSA). Some types 3 and 4 PSG do not monitor so rely on patients' estimation total time (TST).To compare subjective duration with objective measures in patients who underwent type 2 probable OSA.A prospective clinical audit 536 consecutive one the authors between 2006 2013. A standard questionnaire was completed by morning after home to record lights being turned off estimated onset offset. scored based guidelines American Academy Sleep Medicine.Median latency (SL) 20 min compared 10 measured SL (P < 0.0001). There also a significant difference offset (median = -1 min, P 0.01). Estimated TST significantly shorter than -18.5 0.002). No factors have been identified affect accuracy perception. Only 2% had change their OSA calculated apnoea-hypopnoea index.Overall individual variability. Collectively, inaccurate resulted OSA.