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While sleep\u2010diet associations are documented in general populations, evidence in pregnancy is scarce. This study investigated associations between sleep quality and duration and diet quality and dietary intake among Australian pregnant women. Data from two Australian pregnancy cohorts (Newcastle1000 and ORIGINS;\n                    <jats:italic>n<\/jats:italic>\n                    \u2009=\u20091070) were collected at 18\u201320 weeks gestation (2017\u20132024). Sleep was assessed using the Pittsburgh Sleep Quality Index (PSQI), and dietary intake and diet quality using the Australian Eating Survey and Australian Recommended Food Score (ARFS). Generalised linear models examined associations between sleep quality (continuous PSQI score) and sleep duration (&lt;\u20097\u2009h, 7\u20139\u2009h, &gt;\u20099\u2009h) and dietary variables, adjusting for age, income, pre\u2010pregnancy BMI, mental health, physical activity, and cohort. Participants were aged 32.3\u2009\u00b1\u20094.3 years; with a pre\u2010pregnancy BMI of 25.9\u2009\u00b1\u20095.7\u2009kg\/m\n                    <jats:sup>2<\/jats:sup>\n                    and 95.3% were English\u2010speaking. Most participants reported poor sleep quality (72.9%; PSQI global score 6.4\u2009\u00b1\u20092.8) and suboptimal diet quality (ARFS 35.5\u2009\u00b1\u20098.9). Poor sleep quality was associated with higher saturated fat intake (Exp(\u03b2)\u2009=\u20091.004, 95% CI: 1.000,1.008,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.046). Short sleep duration (&lt;\u20097\u2009h) was associated with lower diet quality (\n                    <jats:italic>\u03b2<\/jats:italic>\n                    \u2009=\u2009\u22122.60, 95% CI: \u22123.95, \u22121.25,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009&lt;\u20090.001) and lower fibre intake (Exp(\u03b2)\u2009=\u20090.945, 95% CI: 0.900,0.992,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.022). No other significant associations were observed in adjusted models. Poor sleep quality and short sleep duration were associated with less favourable dietary patterns during pregnancy. This highlights the need for further research to inform integrated interventions that consider sleep quality and duration alongside strategies to support healthier eating patterns and improve maternal and infant health outcomes.\n                  <\/jats:p>","DOI":"10.1111\/mcn.70256","type":"journal-article","created":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T07:27:03Z","timestamp":1789975623000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Associations Between Sleep Health and Diet Quality and Dietary Intake During Pregnancy: Evidence From Two Australian Cohorts"],"prefix":"10.1111","volume":"22","author":[{"given":"Genette Li Hui","family":"Chua","sequence":"first","affiliation":[{"name":"School of Health Sciences, College of Health, Medicine and Wellbeing University of Newcastle, University Drive, Callaghan  New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9166-6195","authenticated-orcid":false,"given":"Mitch J.","family":"Duncan","sequence":"additional","affiliation":[{"name":"School of Medicine and Public Health; College of Health, Medicine and Wellbeing, The University of Newcastle University Drive, Callaghan  New South Wales Australia"},{"name":"Centre for Active Living and Learning University of Newcastle, Callaghan  New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3298-756X","authenticated-orcid":false,"given":"Clare E.","family":"Collins","sequence":"additional","affiliation":[{"name":"School of Health Sciences, College of Health, Medicine and Wellbeing University of Newcastle, University Drive, Callaghan  New South Wales Australia"},{"name":"Food and Nutrition Research Program, Hunter Medical Research Institute New Lambton Heights  New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1895-4123","authenticated-orcid":false,"given":"Rachael M.","family":"Taylor","sequence":"additional","affiliation":[{"name":"School of Health Sciences, College of Health, Medicine and Wellbeing University of Newcastle, University Drive, Callaghan  New South Wales Australia"},{"name":"Food and Nutrition Research Program, Hunter Medical Research Institute New Lambton Heights  New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1564-9799","authenticated-orcid":false,"given":"Kee June","family":"Ooi","sequence":"additional","affiliation":[{"name":"School of Health Sciences, College of Health, Medicine and Wellbeing University of Newcastle, University Drive, Callaghan  New South Wales Australia"},{"name":"Food and Nutrition Research Program, Hunter Medical Research Institute New Lambton Heights  New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0937-6165","authenticated-orcid":false,"given":"Craig E.","family":"Pennell","sequence":"additional","affiliation":[{"name":"School of Medicine and Public Health; College of Health, Medicine and Wellbeing, The University of Newcastle University Drive, Callaghan  New South Wales Australia"},{"name":"Mothers and Babies Research Program, Hunter Medical Research Institute New Lambton Heights  New South Wales Australia"},{"name":"Maternity and Gynaecology Department John Hunter Hospital Newcastle New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4208-0435","authenticated-orcid":false,"given":"Tegan","family":"Grace","sequence":"additional","affiliation":[{"name":"School of Medicine and Public Health; College of Health, Medicine and Wellbeing, The University of Newcastle University Drive, Callaghan  New South Wales Australia"},{"name":"Mothers and Babies Research Program, Hunter Medical Research Institute New Lambton Heights  New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-0724-4683","authenticated-orcid":false,"given":"Poonam Kaur","family":"Pannu","sequence":"additional","affiliation":[{"name":"The Kids Research Institute Australia, Nedlands  Western Australia Australia"},{"name":"Curtin University Bentley Western Australia Australia"},{"name":"The University of Western Australia, Nedlands  Western Australia Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4611-5810","authenticated-orcid":false,"given":"Sasha","family":"Fenton","sequence":"additional","affiliation":[{"name":"School of Health Sciences, College of Health, Medicine and Wellbeing University of Newcastle, University Drive, Callaghan  New South Wales Australia"},{"name":"Food and Nutrition Research Program, Hunter Medical Research Institute New Lambton Heights  New South Wales Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,21]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1093\/advances\/nmaa156"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.20473\/mgi.v17i2.115-121"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1017\/S0954422423000264"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1038\/ejcn.2016.201"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.3390\/nu15092166"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.3390\/nu9080888"},{"key":"e_1_2_10_8_1","unstructured":"Australian Bureau of Statistics (1995). 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