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The study population consisted of 439 consecutive adult patients diagnosed with mild obstructive sleep apnea (5\u2005\u2264 apnea\u2013hypopnea index &lt;\u200515) after a complete polysomnographic evaluation. The patients were divided into three groups based on subjective sleepiness: very sleepy (Epworth Sleepiness Scale \u2265\u200516, <jats:italic>n<\/jats:italic>\u00a0=\u00a059); sleepy (10\u2005&lt; Epworth Sleepiness Scale &lt;\u200516, <jats:italic>n<\/jats:italic>\u00a0=\u00a0102); and non\u2010sleepy (Epworth Sleepiness Scale \u2264\u200510, <jats:italic>n<\/jats:italic>\u00a0=\u00a0278). Demographic, polysomnographic and sleep behaviour data were compared between the groups. There were no statistically significant differences in breathing abnormality indices and most of the demographic features between the groups. The number of arousals was significantly higher in the very sleepy group compared with the non\u2010sleepy group (140.8\u00a0\u00b1\u00a0105.2 versus 107.6\u00a0\u00b1\u00a072.2). Very sleepy patients reported feeling sleepy during the daytime more often (42.4% versus 31.7%) and sleeping significantly less during the week compared with non\u2010sleepy patients. Also, a significantly higher proportion of sleepy (47.1%) and very sleepy patients (44.1%) reported taking naps during weekends compared with non\u2010sleepy patients (35.6%). In a regression analysis, also total sleep time (<jats:italic>\u03b2<\/jats:italic>\u00a0=\u00a00.045), sleep efficiency (<jats:italic>\u03b2<\/jats:italic>\u00a0=\u00a0\u22120.160), apnea index (<jats:italic>\u03b2<\/jats:italic>\u00a0=\u00a0\u22120.397), apnea\u2013hypopnea index in supine position (<jats:italic>\u03b2<\/jats:italic>\u00a0=\u00a00.044), periodic limb movement index (<jats:italic>\u03b2<\/jats:italic>\u00a0=\u00a00.196) and periodic limb movement\u2010related arousal index (<jats:italic>\u03b2<\/jats:italic>\u00a0=\u00a0\u22120.210) affected subjective daytime sleepiness. The results suggest that excessive daytime sleepiness in patients with mild obstructive sleep apnea appears to be related to inadequate sleeping habits (i.e. insufficient sleep during working days) and decreased sleep quality rather than differences in breathing abnormalities.<\/jats:p>","DOI":"10.1111\/jsr.13431","type":"journal-article","created":{"date-parts":[[2021,7,30]],"date-time":"2021-07-30T05:15:28Z","timestamp":1627622128000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["How sleepy patients differ from non\u2010sleepy patients in mild obstructive sleep apnea?"],"prefix":"10.1111","volume":"31","author":[{"given":"Arie","family":"Oksenberg","sequence":"first","affiliation":[{"name":"Sleep Disorders Unit Loewenstein Hospital \u2013 Rehabilitation Center Raanana Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vlada","family":"Goizman","sequence":"additional","affiliation":[{"name":"Sleep Disorders Unit Loewenstein Hospital \u2013 Rehabilitation Center Raanana Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edith","family":"Eitan","sequence":"additional","affiliation":[{"name":"Sleep Disorders Unit Loewenstein Hospital \u2013 Rehabilitation Center Raanana Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kitham","family":"Nasser","sequence":"additional","affiliation":[{"name":"Sleep Disorders Unit Loewenstein Hospital \u2013 Rehabilitation Center Raanana Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Natan","family":"Gadoth","sequence":"additional","affiliation":[{"name":"Sleep Disorders Unit Loewenstein Hospital \u2013 Rehabilitation Center Raanana Israel"},{"name":"Sackler Faculty of Medicine Tel\u2010Aviv University Tel\u2010Aviv Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4017-821X","authenticated-orcid":false,"given":"Timo","family":"Lepp\u00e4nen","sequence":"additional","affiliation":[{"name":"Department of Applied Physics University of Eastern Finland Kuopio Finland"},{"name":"Diagnostic Imaging Center Kuopio University Hospital Kuopio Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,7,29]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1183\/13993003.01148-2015"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S2213-2600(19)30198-5"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.5664\/jcsm.8354"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.5664\/jcsm.7108"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1378\/chest.100.6.1542"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cub.2019.01.069"},{"key":"e_1_2_9_8_1","doi-asserted-by":"crossref","unstructured":"EEG arousals: scoring rules and examples: a preliminary report from the Sleep Disorders Atlas Task Force of the American Sleep Disorders Association(1992).Sleep 15(2) 173\u2013184.","DOI":"10.1093\/sleep\/15.2.174"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1164\/rccm.200605-629PP"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1164\/ajrccm.159.2.9804051"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.5664\/jcsm.8350"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1378\/chest.94.1.32"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/S2213-2600(15)00043-0"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.sleep.2013.02.009"},{"key":"e_1_2_9_15_1","volume-title":"The AASM manual for the scoring of sleep and associated events: Rules, terminology, and technical specification. 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