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Preterm infants (25\u201331\u2009weeks gestation, <jats:italic>n<\/jats:italic>\u2009=\u200929) were studied fortnightly after birth until discharge, in prone and supine positions, and in quiet sleep and active sleep. The percentage of time spent in each sleep state (percentage of time in quiet sleep and percentage of time in active sleep), percentage of total sleep time spent in short apneas and periodic breathing, respectively, the percentage of falls from baseline in heart rate, arterial oxygen saturation and cerebral tissue oxygenation index during short apneas and periodic breathing, and the associated percentage of total sleep time with systemic (arterial oxygen saturation\u2009&lt;\u200990%) and cerebral hypoxia (cerebral tissue oxygenation index\u2009&lt;\u200955%) were analysed using a linear mixed model. Results showed that the prone position decreased (improved) the percentage of falls from baseline in arterial oxygen saturation during both short apneas and periodic breathing, decreased the proportion of infants with periodic breathing and the periodic breathing\u2010associated percentage of total sleep time with cerebral hypoxia. The percentage of time in quiet sleep was higher in the prone position. Quiet sleep decreased the percentage of total sleep time spent in short apneas, the short apneas\u2010associated percentage of falls from baseline in heart rate, arterial oxygen saturation, and proportion of infants with systemic hypoxia. Quiet sleep also decreased the proportion of infants with periodic breathing and percentage of total sleep time with cerebral hypoxia. The effects of sleep position and sleep state were not related to postmenstrual age. In summary, when sleep state is controlled for, the prone sleeping position has some benefits during both short apneas and periodic breathing. Quiet sleep improves cardiorespiratory stability and is increased in the prone position at the expense of active sleep, which is critical for brain maturation. This evidence should be considered in positioning preterm infants.<\/jats:p>","DOI":"10.1111\/jsr.14253","type":"journal-article","created":{"date-parts":[[2024,6,4]],"date-time":"2024-06-04T09:35:53Z","timestamp":1717493753000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Short apneas and periodic breathing in preterm infants in the neonatal intensive care unit\u2014Effects of sleep position, sleep state, and age"],"prefix":"10.1111","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-2351-6336","authenticated-orcid":false,"given":"Georgina","family":"Plunkett","sequence":"first","affiliation":[{"name":"The Ritchie Centre Hudson Institute of Medical Research  Melbourne Victoria Australia"},{"name":"The Department of Paediatrics Monash University  Melbourne Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephanie","family":"Yiallourou","sequence":"additional","affiliation":[{"name":"The Turner Institute for Brain and Mental Health, School of Psychological Sciences, Monash University  Melbourne Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-7235-0812","authenticated-orcid":false,"given":"Aimee","family":"Voigt","sequence":"additional","affiliation":[{"name":"The Ritchie Centre Hudson Institute of Medical Research  Melbourne Victoria Australia"},{"name":"The Department of Paediatrics Monash University  Melbourne Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aishah","family":"Segumohamed","sequence":"additional","affiliation":[{"name":"The Department of Paediatrics Monash University  Melbourne Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kelsee","family":"Shepherd","sequence":"additional","affiliation":[{"name":"The Ritchie Centre Hudson Institute of Medical Research  Melbourne Victoria Australia"},{"name":"The Department of Paediatrics Monash University  Melbourne Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3575-0461","authenticated-orcid":false,"given":"Rosemary","family":"Horne","sequence":"additional","affiliation":[{"name":"The Department of Paediatrics Monash University  Melbourne Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8265-2330","authenticated-orcid":false,"given":"Flora","family":"Wong","sequence":"additional","affiliation":[{"name":"The Ritchie Centre Hudson Institute of Medical Research  Melbourne Victoria Australia"},{"name":"The Department of Paediatrics Monash University  Melbourne Victoria Australia"},{"name":"Monash Newborn, Monash Children's Hospital  Melbourne Victoria Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,6,4]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00442298"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpeds.2012.09.038"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpeds.2018.11.038"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.infbeh.2008.09.001"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.118.3062.273"},{"key":"e_1_2_11_7_1","first-page":"90","article-title":"Sleep disturbances in newborns","volume":"4","author":"Barbeau D. 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