{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,3]],"date-time":"2026-08-03T05:45:30Z","timestamp":1785735930441,"version":"3.56.0"},"reference-count":44,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T00:00:00Z","timestamp":1783036800000},"content-version":"vor","delay-in-days":2,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T00:00:00Z","timestamp":1782864000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["JP21K11665"],"award-info":[{"award-number":["JP21K11665"]}],"id":[{"id":"10.13039\/501100001691","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":[[2026,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>Geographic variation in child body size in Japan has previously been associated with effective day length, a light\u2010related measure. We tested whether this prefecture\u2010level geographic structure remained stable across the COVID\u201019\u2010related disruption.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We conducted a prefecture\u2010level ecological analysis using repeated cross\u2010sectional summaries from Japan's School Health Statistics. For each sex and single\u2010year age from 5 to 17\u2009years, we compared a pre\u2010pandemic baseline (2017\u20132019 mean) with a post\u2010disruption period (2024\u20132025 mean). Effective day length above 5000\u2009lx (ED5000) was treated as a prefecture\u2010fixed exposure. Mean height was modeled as a function of mean weight and ED5000, and slope stability was tested using pooled models with an ED5000\u2010by\u2010period interaction term.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Across ages 5\u201317\u2009years in both sexes, mean height was generally higher in the post\u2010period than in the pre\u2010period, and mean weight also showed an upward shift across most ages, with the largest increases around peri\u2010pubertal ages. ED5000 remained negatively associated with height conditional on weight in both periods, and there was no evidence that the ED5000\u2010associated slope changed between periods at any age in either sex. In contrast, post\u2010period differences in height appeared mainly as age\u2010dependent upward shifts concentrated around peri\u2010pubertal ages, peaking at ages 10\u201311\u2009years in girls and 12\u201313\u2009years in boys.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>These findings suggest that COVID\u2010era disruptions were followed by age\u2010specific increases in body size around puberty, consistent with changes in maturation tempo. In contrast, the ED5000\u2013height association remained stable. Thus, period\u2010related growth shifts occurred within a persistent geographic structure.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/ajhb.70306","type":"journal-article","created":{"date-parts":[[2026,7,4]],"date-time":"2026-07-04T04:09:59Z","timestamp":1783138199000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Peri\u2010Pubertal Height Shifts and Stable Photoperiod\u2010Associated Geographic Patterning Before and After\n                    <scp>COVID<\/scp>\n                    \u201019 in Japanese Children"],"prefix":"10.1002","volume":"38","author":[{"given":"Masana","family":"Yokoya","sequence":"first","affiliation":[{"name":"Faculty of Environmental Sciences University of Human Environments  Okazaki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,7,3]]},"reference":[{"key":"e_1_2_12_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1467\u20108624.1991.tb01558.x"},{"key":"e_1_2_12_3_1","doi-asserted-by":"publisher","DOI":"10.1037\/0033\u20102909.130.6.920"},{"key":"e_1_2_12_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/1467\u20108624.00159"},{"key":"e_1_2_12_5_1","doi-asserted-by":"publisher","DOI":"10.7759\/cureus.71002"},{"key":"e_1_2_12_6_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0072269"},{"key":"e_1_2_12_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ehb.2023.101283"},{"key":"e_1_2_12_8_1","unstructured":"Japan Meteorological Agency.2012.\u201cMesh Climatic Data 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