{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T21:20:30Z","timestamp":1792790430369,"version":"4.5.0"},"reference-count":33,"publisher":"SAGE Publications","issue":"6","license":[{"start":{"date-parts":[[2013,12,11]],"date-time":"2013-12-11T00:00:00Z","timestamp":1386720000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Cephalalgia"],"published-print":{"date-parts":[[2014,5]]},"abstract":"<jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>The objective of this article is to determine the monthly variation of emergency department (ED) visits for pediatric headache. We hypothesized youth have increased headache-related ED visits in the months associated with school attendance.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Using a United States representative sample of ED visits in the National Hospital Ambulatory Medical Care Survey from 1997 to 2009, we estimated number of visits associated with ICD-9 codes related to headache, migraine, status migrainosus, or tension-type headache in 5- to 18-year-olds. Age-stratified multivariate models are presented for month of visit (July as reference).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>There was a national estimate of 250,000 ED visits annually related to headache (2.1% of total visits) in 5- to 18-year-olds. In 5- to 11-year-olds, the adjusted rate of headache-related visits was lower in April (OR 0.42, 95% CI 0.20, 0.88). In 12- to 18-year-olds, there were higher rates in January (OR 1.92, 95% CI 1.16, 3.14) and September (OR 1.64, 95% CI 1.06, 2.55).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>In adolescents we found higher ED utilization in January and September, the same months associated with school return from vacation for a majority of children nationally. No significant reduction in the summer suggests that school itself is not the issue, but rather changes in daily lifestyle and transitions.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/0333102413515346","type":"journal-article","created":{"date-parts":[[2013,12,12]],"date-time":"2013-12-12T01:08:01Z","timestamp":1386810481000},"page":"473-478","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":30,"title":["Monthly variation of United States pediatric headache emergency department visits"],"prefix":"10.1177","volume":"34","author":[{"given":"Sita","family":"Kedia","sequence":"first","affiliation":[{"name":"Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, CO, USA"},{"name":"Department of Emergency Medicine, University of Colorado School of Medicine, CO, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adit A","family":"Ginde","sequence":"additional","affiliation":[{"name":"Children's Outcomes Research, University of Colorado Denver, Anschutz Medical Campus, CO, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joseph A","family":"Grubenhoff","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, CO, USA"},{"name":"Children's Outcomes Research, University of Colorado Denver, Anschutz Medical Campus, CO, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Allison","family":"Kempe","sequence":"additional","affiliation":[{"name":"Department of Pediatrics, University of Colorado School of Medicine, Anschutz Medical Campus, CO, USA"},{"name":"Department of Emergency Medicine, University of Colorado School of Medicine, CO, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew D","family":"Hershey","sequence":"additional","affiliation":[{"name":"University of Cincinnati College of Medicine and Cincinnati Children's Hospital Medical Center, OH, USA"},{"name":"Cincinnati Children's Hospital Medical Center, Division of Neurology, OH, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Scott W","family":"Powers","sequence":"additional","affiliation":[{"name":"University of Cincinnati College of Medicine and Cincinnati Children's Hospital Medical Center, OH, USA"},{"name":"Cincinnati Children's Hospital Medical Center, Division of Behavioral Medicine and Clinical Psychology, OH, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2013,12,11]]},"reference":[{"key":"bibr1-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.309.6957.765"},{"key":"bibr2-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1046\/j.1526-4610.1999.3907494.x"},{"key":"bibr3-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1111\/j.1469-8749.1988.tb04799.x"},{"key":"bibr4-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1007\/s11916-005-0010-y"},{"key":"bibr5-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1007\/s10964-011-9719-6"},{"key":"bibr6-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1207\/SJRA1002_5"},{"key":"bibr7-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1177\/0022022198296003"},{"key":"bibr8-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1111\/j.1651-2227.2007.00585.x"},{"key":"bibr9-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1007\/s10194-009-0147-x"},{"key":"bibr10-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1093\/jpepsy\/jsr017"},{"key":"bibr11-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1007\/s10194-011-0397-2"},{"key":"bibr12-0333102413515346","doi-asserted-by":"publisher","DOI":"10.1111\/j.1526-4610.2006.00613.x"},{"key":"bibr13-0333102413515346","first-page":"1","volume":"1","author":"McCaig 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