{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T10:43:42Z","timestamp":1791283422101,"version":"4.1.0"},"reference-count":22,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2005,6,2]],"date-time":"2005-06-02T00:00:00Z","timestamp":1117670400000},"content-version":"vor","delay-in-days":4139,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Teratology"],"published-print":{"date-parts":[[1994,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Isolated neural tube defects (NTDs) appear to have different risk factors compared to nonisolated NTDs. To extend those observations, we explored routinely collected child and parental characteristics as possible risk factors among isolated versus nonisolated NTD cases, among high versus low spina bifida cases, and among open versus skin\u2010covered spina bifida cases. Fetuses and liveborn infants with anencephaly or spina bifida among the 1983\u2010\u201087 cohort of births and fetal deaths (n = 712,863) were ascertained by the California Birth Defects Monitoring Program. One hundred and ninety\u2010three anencephalic cases and 272 spina bifida cases were compared to a random sample of 5,000 liveborn infants. Among anencephalic cases, 55% were livebirths and 85% were isolated. The proportion of males was similar to females across all subgroups. Increased risks were found for Hispanic whites, with risk estimates highest for nonisolated cases (odds ratio = 4.0, 95% confidence interval [1.5,10.5]). Among spina bifida cases, 92% were livebirths, 81 % isolated, 82% open, and 86% were low. More males were found among the group with isolated high open defects, and fewer males were found among the group of all closed defects. The proportion of males was similar to females in all other subgroups. Cases were more likely to be Hispanic with risks largest for high open defects (odds ratio = 2.9, [1.2,6.6]), particularly for nonisolated cases. This study provides some evidence that further classifications of NTDs may reveal subgroupings of cases with different etiologies. \u00a9 1994 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/tera.1420490210","type":"journal-article","created":{"date-parts":[[2005,6,11]],"date-time":"2005-06-11T12:01:37Z","timestamp":1118491297000},"page":"143-149","source":"Crossref","is-referenced-by-count":101,"title":["Epidemiologic characteristics of phenotypically distinct neural tube defects among 0.7 Million California births, 1983\u20131987"],"prefix":"10.1002","volume":"49","author":[{"given":"Gary M.","family":"Shaw","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nancy G.","family":"Jensvold","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cathy R.","family":"Wasserman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Edward J.","family":"Lammer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2005,6,2]]},"reference":[{"key":"e_1_2_1_2_1","first-page":"33","article-title":"Epidemiology of anencephaly in Texas, 1981\u20131986","volume":"85","author":"Brender J. 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A report from the International Clearinghouse for Birth Defects Monitoring Systems","author":"International Clearinghouse for Birth Defects","year":"1991"},{"key":"e_1_2_1_13_1","doi-asserted-by":"publisher","DOI":"10.1093\/oxfordjournals.aje.a113335"},{"key":"e_1_2_1_14_1","doi-asserted-by":"crossref","first-page":"636","DOI":"10.1542\/peds.65.3.636","article-title":"The puzzling epidemiology of neural tube defects","volume":"65","author":"Mortimer E. A.","year":"1980","journal-title":"Pediatrics"},{"key":"e_1_2_1_15_1","doi-asserted-by":"publisher","DOI":"10.1093\/oxfordjournals.aje.a116470"},{"key":"e_1_2_1_16_1","doi-asserted-by":"publisher","DOI":"10.1002\/ajmg.1320260325"},{"key":"e_1_2_1_17_1","first-page":"77","article-title":"Neural tube defects: Heterogeneity and homogeneity","volume":"2","author":"Seller M. J.","year":"1987","journal-title":"Am. J. Med. Genet. 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