{"id":"https://openalex.org/W2409883226","doi":null,"title":"Determination of ages of elderly Nigerians through historical events: validation of Ajayi-Igun 1963 listing.","display_name":"Determination of ages of elderly Nigerians through historical events: validation of Ajayi-Igun 1963 listing.","publication_year":1993,"publication_date":"1993-10-01","ids":{"openalex":"https://openalex.org/W2409883226","mag":"2409883226","pmid":"https://pubmed.ncbi.nlm.nih.gov/8199057"},"language":"en","primary_location":{"id":"pmid:8199057","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/8199057","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":"West African journal of medicine","raw_type":"Comparative Study"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["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/A5026755583","display_name":"Adesola O. Ogunniyi","orcid":"https://orcid.org/0000-0002-2946-8956","observed_orcids":["https://orcid.org/0000-0002-2946-8956"]},"institutions":[{"id":"https://openalex.org/I2800598127","display_name":"University College Hospital, Ibadan","ror":"https://ror.org/022yvqh08","country_code":"NG","type":"healthcare","lineage":["https://openalex.org/I2800598127"]}],"countries":["NG"],"is_corresponding":false,"raw_author_name":"A Ogunniyi","raw_affiliation_strings":["Department of Medicine, University College Hospital, Ibadan, Nigeria","Dept. of Medicine, University College Hospital, Ibadan, Nigeria"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Medicine, University College Hospital, Ibadan, Nigeria","institution_ids":["https://openalex.org/I2800598127"]},{"raw_affiliation_string":"Dept. of Medicine, University College Hospital, Ibadan, Nigeria","institution_ids":["https://openalex.org/I2800598127"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5059561312","display_name":"B O Osuntokun","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"B O Osuntokun","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":51,"citation_normalized_percentile":{"value":0.0,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":98},"biblio":{"volume":"12","issue":"4","first_page":"189","last_page":"90"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12011","display_name":"Insurance, Mortality, Demography, Risk Management","score":0.4787999987602234,"subfield":{"id":"https://openalex.org/subfields/3317","display_name":"Demography"},"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/T12011","display_name":"Insurance, Mortality, Demography, Risk Management","score":0.4787999987602234,"subfield":{"id":"https://openalex.org/subfields/3317","display_name":"Demography"},"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/T10992","display_name":"Forensic Anthropology and Bioarchaeology Studies","score":0.4120999872684479,"subfield":{"id":"https://openalex.org/subfields/1204","display_name":"Archeology (arts and humanities)"},"field":{"id":"https://openalex.org/fields/12","display_name":"Arts and Humanities"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T13546","display_name":"Census and Population Estimation","score":0.014299999922513962,"subfield":{"id":"https://openalex.org/subfields/2613","display_name":"Statistics and Probability"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/age-estimation","display_name":"age estimation","score":0.828000009059906},{"id":"https://openalex.org/keywords/age-validation","display_name":"age validation","score":0.515999972820282},{"id":"https://openalex.org/keywords/historical-documents","display_name":"historical documents","score":0.5059999823570251},{"id":"https://openalex.org/keywords/birth-records","display_name":"birth records","score":0.6029999852180481}],"concepts":[{"id":"https://openalex.org/C2778182931","wikidata":"https://www.wikidata.org/wiki/Q16155102","display_name":"Nigerians","level":2,"score":0.987755298614502},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.8460766077041626},{"id":"https://openalex.org/C2779820595","wikidata":"https://www.wikidata.org/wiki/Q798505","display_name":"Listing (finance)","level":2,"score":0.6645666360855103},{"id":"https://openalex.org/C149923435","wikidata":"https://www.wikidata.org/wiki/Q37732","display_name":"Demography","level":1,"score":0.5875888466835022},{"id":"https://openalex.org/C2986834420","wikidata":"https://www.wikidata.org/wiki/Q5932254","display_name":"Age groups","level":2,"score":0.5368630886077881},{"id":"https://openalex.org/C3018023364","wikidata":"https://www.wikidata.org/wiki/Q425265","display_name":"Significant difference","level":2,"score":0.5239646434783936},{"id":"https://openalex.org/C126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","level":1,"score":0.09781727194786072},{"id":"https://openalex.org/C199539241","wikidata":"https://www.wikidata.org/wiki/Q7748","display_name":"Law","level":1,"score":0.047548532485961914},{"id":"https://openalex.org/C10138342","wikidata":"https://www.wikidata.org/wiki/Q43015","display_name":"Finance","level":1,"score":0.0},{"id":"https://openalex.org/C17744445","wikidata":"https://www.wikidata.org/wiki/Q36442","display_name":"Political science","level":0,"score":0.0},{"id":"https://openalex.org/C144024400","wikidata":"https://www.wikidata.org/wiki/Q21201","display_name":"Sociology","level":0,"score":0.0},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0}],"mesh":[{"descriptor_ui":"D000367","descriptor_name":"Age Factors","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D000368","descriptor_name":"Aged","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D003710","descriptor_name":"Demography","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D004282","descriptor_name":"Documentation","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D004812","descriptor_name":"Epidemiologic Methods","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005069","descriptor_name":"Evaluation Studies as Topic","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D006664","descriptor_name":"History","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D006801","descriptor_name":"Humans","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":"D015203","descriptor_name":"Reproducibility of Results","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D015982","descriptor_name":"Bias","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false}],"locations_count":2,"locations":[{"id":"pmid:8199057","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/8199057","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":"West African journal of medicine","raw_type":"Comparative Study"},{"id":"mag:2409883226","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/8199057","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":null,"is_accepted":false,"is_published":false,"raw_source_name":"PubMed","raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[{"id":"https://openalex.org/study-designs/observational-study","display_name":"Observational Study"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2989821328","https://openalex.org/W2089328885","https://openalex.org/W2296672523","https://openalex.org/W2045952329","https://openalex.org/W7098921149","https://openalex.org/W2016976740","https://openalex.org/W2410520839","https://openalex.org/W7054550762","https://openalex.org/W817449056","https://openalex.org/W2732870145"],"abstract_inverted_index":{"We":[0],"compared":[1],"ages":[2,30,50,64],"of":[3,20,31,46,78,95,121],"59":[4],"elderly":[5],"Nigerians":[6,103],"subjects":[7,33],"determined":[8,35],"independently":[9],"by":[10,36,55],"records":[11,120],"and":[12,58,104,112],"historical":[13,96],"events":[14],"to":[15],"validate":[16,92],"the":[17,28,32,37,47,49,53,61,75,93],"Ajayi-Igun":[18],"listing":[19,97],"1963.":[21],"There":[22,68],"was":[23,65,69],"no":[24],"statistically":[25],"difference":[26,62],"between":[27,74],"mean":[29],"as":[34],"2":[38],"methods":[39,57,77],"(p":[40],">":[41],"0.05).":[42],"In":[43],"almost":[44],"50%":[45],"subjects,":[48],"were":[51],"exactly":[52],"same":[54],"both":[56],"in":[59,63,102,116],"93.2%,":[60],"3":[66],"years.":[67],"a":[70],"high":[71],"significant":[72],"correlation":[73,82],"two":[76],"age":[79,100],"determination":[80,101],"(Spearman":[81],"coefficient":[83],"rs":[84],"=":[85],"0.989,":[86],"p":[87],"<":[88],"10(-5)).":[89],"Our":[90],"study":[91],"use":[94,106],"for":[98,109],"accurate":[99],"its":[105],"is":[107],"advocated":[108],"epidemiologic":[110],"studies":[111],"other":[113],"demographic":[114],"needs":[115],"circumstances":[117],"where":[118],"written":[119],"births":[122],"are":[123],"lacking.":[124]},"counts_by_year":[{"year":2025,"cited_by_count":2},{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":3},{"year":2020,"cited_by_count":3},{"year":2019,"cited_by_count":5},{"year":2018,"cited_by_count":3},{"year":2017,"cited_by_count":2},{"year":2016,"cited_by_count":2},{"year":2015,"cited_by_count":4},{"year":2014,"cited_by_count":3},{"year":2013,"cited_by_count":1},{"year":2012,"cited_by_count":4}],"updated_date":"2026-11-04T10:54:05.112534","created_date":"2016-06-24T00:00:00"}
