{"id":"https://openalex.org/W2163376632","doi":"https://doi.org/10.1080/03014467500000681","title":"Sex ratio of live births in south-western Nigeria","display_name":"Sex ratio of live births in south-western Nigeria","publication_year":1975,"publication_date":"1975-01-01","ids":{"openalex":"https://openalex.org/W2163376632","doi":"https://doi.org/10.1080/03014467500000681","mag":"2163376632","pmid":"https://pubmed.ncbi.nlm.nih.gov/1052745"},"language":"en","primary_location":{"id":"doi:10.1080/03014467500000681","doi":"https://doi.org/10.1080/03014467500000681","is_oa":false,"landing_page_url":"https://doi.org/10.1080/03014467500000681","pdf_url":null,"source":{"id":"https://openalex.org/S172316950","display_name":"Annals of Human Biology","issn_l":"0301-4460","issn":["0301-4460","1464-5033"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-c","erih-plus","jufo-1","ki-jl-1","medline","norway-1","oarl","poland-40","russia-white-list-2","vabb-shw"],"host_organization":"https://openalex.org/P4310320449","host_organization_name":"Informa","host_organization_lineage":["https://openalex.org/P4310320449"],"host_organization_lineage_names":["Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Annals of Human Biology","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref","doaj","pubmed"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5111702646","display_name":"Olusola Ayeni","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I181631907","display_name":"University of Ibadan","ror":"https://ror.org/03wx2rr30","country_code":"NG","type":"education","lineage":["https://openalex.org/I181631907"]}],"countries":["NG"],"is_corresponding":true,"raw_author_name":"Olusola Ayeni","raw_affiliation_strings":["Department of Preventive and Social Medicine, University of Ibadan, Nigeria"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Preventive and Social Medicine, University of Ibadan, Nigeria","institution_ids":["https://openalex.org/I181631907"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5111702646"],"corresponding_institution_ids":["https://openalex.org/I181631907"],"apc_list":{"value":2390,"currency":"USD","value_usd":2390},"apc_paid":null,"fwci":3.7144,"has_fulltext":false,"cited_by_count":18,"citation_normalized_percentile":{"value":0.94401457,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":94},"biblio":{"volume":"2","issue":"2","first_page":"137","last_page":"141"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12728","display_name":"Demographic Trends and Gender Preferences","score":0.9916999936103821,"subfield":{"id":"https://openalex.org/subfields/3318","display_name":"Gender Studies"},"field":{"id":"https://openalex.org/fields/33","display_name":"Social Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},"topics":[{"id":"https://openalex.org/T12728","display_name":"Demographic Trends and Gender Preferences","score":0.9916999936103821,"subfield":{"id":"https://openalex.org/subfields/3318","display_name":"Gender Studies"},"field":{"id":"https://openalex.org/fields/33","display_name":"Social Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T11956","display_name":"Sexual Differentiation and Disorders","score":0.0007999999797903001,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T13332","display_name":"Historical Studies on Reproduction, Gender, Health, and Societal Changes","score":0.0006000000284984708,"subfield":{"id":"https://openalex.org/subfields/1202","display_name":"History"},"field":{"id":"https://openalex.org/fields/12","display_name":"Arts and Humanities"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/sex-ratio-at-birth","display_name":"sex ratio at birth","score":0.9039999842643738},{"id":"https://openalex.org/keywords/live-birth","display_name":"live birth","score":0.8100000023841858},{"id":"https://openalex.org/keywords/yoruba-language","display_name":"Yoruba","score":0.8009999990463257},{"id":"https://openalex.org/keywords/southwestern-nigeria","display_name":"Southwest Nigeria","score":0.8379999995231628},{"id":"https://openalex.org/keywords/african-populations","display_name":"African populations","score":0.5669999718666077},{"id":"https://openalex.org/keywords/civil-registration","display_name":"civil registration","score":0.9879999756813049}],"concepts":[{"id":"https://openalex.org/C57520943","wikidata":"https://www.wikidata.org/wiki/Q1068155","display_name":"Sex ratio","level":3,"score":0.6622800230979919},{"id":"https://openalex.org/C149923435","wikidata":"https://www.wikidata.org/wiki/Q37732","display_name":"Demography","level":1,"score":0.5997319221496582},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.38394737243652344},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.32560619711875916},{"id":"https://openalex.org/C2908647359","wikidata":"https://www.wikidata.org/wiki/Q2625603","display_name":"Population","level":2,"score":0.22945138812065125},{"id":"https://openalex.org/C144024400","wikidata":"https://www.wikidata.org/wiki/Q21201","display_name":"Sociology","level":0,"score":0.13247352838516235}],"mesh":[{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D007231","descriptor_name":"Infant, Newborn","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D009549","descriptor_name":"Nigeria","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012189","descriptor_name":"Retrospective Studies","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012744","descriptor_name":"Sex Ratio","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D044383","descriptor_name":"Black People","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true}],"locations_count":2,"locations":[{"id":"doi:10.1080/03014467500000681","doi":"https://doi.org/10.1080/03014467500000681","is_oa":false,"landing_page_url":"https://doi.org/10.1080/03014467500000681","pdf_url":null,"source":{"id":"https://openalex.org/S172316950","display_name":"Annals of Human Biology","issn_l":"0301-4460","issn":["0301-4460","1464-5033"],"is_oa":false,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-scientific","cwts-core","doaj","dongbi-c","erih-plus","jufo-1","ki-jl-1","medline","norway-1","oarl","poland-40","russia-white-list-2","vabb-shw"],"host_organization":"https://openalex.org/P4310320449","host_organization_name":"Informa","host_organization_lineage":["https://openalex.org/P4310320449"],"host_organization_lineage_names":["Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Annals of Human Biology","raw_type":"journal-article"},{"id":"pmid:1052745","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/1052745","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Annals of human biology","raw_type":"Journal Article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Reduced inequalities","score":0.7578999996185303,"id":"https://metadata.un.org/sdg/10"},{"display_name":"Gender equality","score":0.6025999784469604,"id":"https://metadata.un.org/sdg/5"},{"display_name":"Good health and well-being","score":0.4000000059604645,"id":"https://metadata.un.org/sdg/3"}],"study_designs":[{"display_name":"Observational Study","id":"https://openalex.org/study-designs/observational-study"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":6,"referenced_works":["https://openalex.org/W1513947731","https://openalex.org/W1992251070","https://openalex.org/W1994902065","https://openalex.org/W2273267733","https://openalex.org/W2428294638","https://openalex.org/W2506283631"],"related_works":["https://openalex.org/W2008250929","https://openalex.org/W2033337179","https://openalex.org/W4385850974","https://openalex.org/W2434142970","https://openalex.org/W4249955886","https://openalex.org/W2045395065","https://openalex.org/W2618630317","https://openalex.org/W2502908874","https://openalex.org/W2279619740","https://openalex.org/W7095678944"],"abstract_inverted_index":{"Among":[0,63],"European":[1],"and":[2,81],"North":[3],"American":[4,115],"whites,":[5],"the":[6,20,23,29,32,36,41,48,69,96,102,112],"proportion":[7,37,71,104],"of":[8,31,57,88],"males":[9],"among":[10,17,38],"live":[11,67,93,100],"births":[12,68],"is":[13,25,40],"about":[14],"51.4%,":[15],"while":[16,74],"negroes":[18,46],"in":[19,47,90],"United":[21,49],"States":[22],"figure":[24,87],"50.7%.":[26],"To":[27],"test":[28],"correctness":[30],"common":[33],"assumption":[34],"that":[35,44],"Africans":[39],"same":[42],"as":[43],"for":[45,55,78,114],"States,":[50],"records":[51,77],"over":[52],"seven":[53],"years":[54],"Yorubas":[56],"south-western":[58],"Nigeria":[59],"have":[60],"been":[61],"examined.":[62],"548":[64],"558":[65],"hospital":[66],"male":[70],"was":[72,105],"51.37%,":[73],"vital":[75],"registration":[76],"one":[79,82],"urban":[80],"rural":[83],"town":[84],"showed":[85],"a":[86],"51.39%":[89],"315":[91],"735":[92],"births.":[94],"Of":[95],"total":[97],"864":[98],"331":[99],"births,":[101],"overall":[103],"51.4":[106],"+/-":[107],"0.05%,":[108],"significantly":[109],"higher":[110],"than":[111],"50.7%":[113],"negroes.":[116]},"counts_by_year":[{"year":2022,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2015,"cited_by_count":1},{"year":2014,"cited_by_count":1}],"updated_date":"2026-10-31T12:09:11.096373","created_date":"2016-06-24T00:00:00"}
