{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T07:50:20Z","timestamp":1753861820287,"version":"3.41.2"},"reference-count":36,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2023,2,6]],"date-time":"2023-02-06T00:00:00Z","timestamp":1675641600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100006120","name":"Ministry of the Environment, Government of Japan","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100006120","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["American J Hum Biol"],"published-print":{"date-parts":[[2023,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>Some newborns that are not small\u2010for\u2010gestational\u2010age (non\u2010SGA, birthweight \u226510th percentile for a given gestational age) may have pathologic growth restrictions. This study examined the association of adverse obstetric and neonatal outcomes with chest\/head circumference ratio at birth in non\u2010SGA and SGA newborns.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This study was a cross\u2010sectional evaluation of data from a nationwide prospective birth cohort study, the Japan Environment and Children's Study. We analyzed 93\u2009690 non\u2010anomalous singletons born at 34\u201341 gestational weeks. We defined low, normal, and high chest\/head circumference ratio as &lt;10th percentile, 10th\u201390th percentile, and\u2009&gt;90th percentile, respectively, according to the internally constructed chest\/head circumference percentile chart. Modified Poisson regression was used to estimate adjusted prevalence ratios (aPR) for the outcomes studied.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Compared with non\u2010SGA newborns with a normal ratio, those with a low ratio had an increased occurrence of low birthweight (1.75, 1.58\u20131.94 [aPR, 95% confidence interval]), cesarean delivery (1.34, 1.29\u20131.38), Apgar score\u2009&lt;7 at 5\u00a0min (1.57, 1.14\u20132.17), respiratory complications (1.20, 1.04\u20131.39), and prolonged hospitalization (1.36, 1.30\u20131.42). In contrast, the high\u2010ratio group had a lower rate of low birthweight (0.71, 0.59\u20130.86), cesarean delivery (0.82, 0.77\u20130.87), and prolonged hospitalization (0.83, 0.78\u20130.89). In SGA newborns, a low ratio was associated with increased aPRs for low birthweight, cesarean delivery, hypoglycemia, and prolonged hospitalization, whereas a high ratio showed no such association.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Findings indicate that the chest\/head circumference ratio at birth influence obstetric and neonatal outcomes regardless of the birthweight status.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ajhb.23875","type":"journal-article","created":{"date-parts":[[2023,2,6]],"date-time":"2023-02-06T13:12:34Z","timestamp":1675689154000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["<scp>Influence<\/scp> of chest\/head circumference ratio at birth on obstetric and neonatal outcomes: The Japan environment and children's study"],"prefix":"10.1002","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6862-2290","authenticated-orcid":false,"given":"Naw Awn","family":"J.\u2010P.","sequence":"first","affiliation":[{"name":"Department of Environmental Medicine, Kochi Medical School Kochi University  Nankoku Kochi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Naomi","family":"Mitsuda","sequence":"additional","affiliation":[{"name":"Department of Environmental Medicine, Kochi Medical School Kochi University  Nankoku Kochi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masamitsu","family":"Eitoku","sequence":"additional","affiliation":[{"name":"Department of Environmental Medicine, Kochi Medical School Kochi University  Nankoku Kochi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Keiko","family":"Yamasaki","sequence":"additional","affiliation":[{"name":"Department of Environmental Medicine, Kochi Medical School Kochi University  Nankoku Kochi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nagamasa","family":"Maeda","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Kochi Medical School Kochi University  Nankoku Kochi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mikiya","family":"Fujieda","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, Kochi Medical School Kochi University  Nankoku Kochi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Narufumi","family":"Suganuma","sequence":"additional","affiliation":[{"name":"Department of Environmental Medicine, Kochi Medical School Kochi University  Nankoku Kochi Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"name":"The Japan Environment and Children's Study (JECS) Group","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2023,2,6]]},"reference":[{"doi-asserted-by":"publisher","key":"e_1_2_11_2_1","DOI":"10.1186\/1471-2393-10-25"},{"doi-asserted-by":"publisher","key":"e_1_2_11_3_1","DOI":"10.1016\/j.placenta.2006.01.001"},{"doi-asserted-by":"publisher","key":"e_1_2_11_4_1","DOI":"10.1016\/j.ajog.2017.11.577"},{"doi-asserted-by":"publisher","key":"e_1_2_11_5_1","DOI":"10.1016\/j.bpobgyn.2018.02.003"},{"issue":"1","key":"e_1_2_11_6_1","first-page":"45","article-title":"The LMS method for constructing normalized growth standards","volume":"44","author":"Cole T. 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