{"id":"https://openalex.org/W124841179","doi":null,"title":"Sample size calculation in epidemiological studies","display_name":"Sample size calculation in epidemiological studies","publication_year":2006,"publication_date":"2006-01-01","ids":{"openalex":"https://openalex.org/W124841179","mag":"124841179"},"language":"en","primary_location":{"id":"pmh:oai:CiteSeerX.psu:10.1.1.552.2174","doi":null,"is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.552.2174","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://www.gerontologija.lt/files/edit_files/File/pdf/2006/nr_4/2006_225_231.pdf","raw_type":"text"},"volume":null,"type":"article","is_traditional":true,"indexed_in":[],"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/A5038234383","display_name":"Vytautas Kasiulevi\u010dius","orcid":"https://orcid.org/0000-0001-9967-8257","observed_orcids":["https://orcid.org/0000-0001-9967-8257"]},"institutions":[{"id":"https://openalex.org/I4210161607","display_name":"Vilnius University Hospital Santariskiu Klinikos","ror":"https://ror.org/0590pq693","country_code":"LT","type":"healthcare","lineage":["https://openalex.org/I4210161607"]}],"countries":["LT"],"is_corresponding":false,"raw_author_name":"Vytautas Kasiulevi\u010dius","raw_affiliation_strings":["Vilnius University Hospital \u201cSantaros Klinikos\u201d"],"raw_orcid":"https://orcid.org/0000-0001-9967-8257","affiliations":[{"raw_affiliation_string":"Vilnius University Hospital \u201cSantaros Klinikos\u201d","institution_ids":["https://openalex.org/I4210161607"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5008197001","display_name":"V. \u0160apoka","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"V. \u0160apoka","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5088678418","display_name":"R. Filipavi\u010di\u016bt\u0117","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"R. Filipavi\u010di\u016bt\u0117","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":0.2971,"has_fulltext":false,"cited_by_count":226,"citation_normalized_percentile":{"value":0.58404611,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":100},"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T14374","display_name":"Statistical Methods in Epidemiology","score":0.9771000146865845,"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"}},"topics":[{"id":"https://openalex.org/T14374","display_name":"Statistical Methods in Epidemiology","score":0.9771000146865845,"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"}},{"id":"https://openalex.org/T11235","display_name":"Statistical Methods in Clinical Trials","score":0.021900000050663948,"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"}},{"id":"https://openalex.org/T13500","display_name":"Probability and Statistical Research","score":0.00019999999494757503,"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/sample-size-calculation","display_name":"sample size determination","score":0.9710000157356262},{"id":"https://openalex.org/keywords/epidemiological-study-design","display_name":"epidemiological study design","score":0.8579999804496765},{"id":"https://openalex.org/keywords/randomized-controlled-trials","display_name":"randomized controlled trials","score":0.9210000038146973},{"id":"https://openalex.org/keywords/observational-studies","display_name":"observational studies","score":0.9430000185966492},{"id":"https://openalex.org/keywords/descriptive-research","display_name":"descriptive research","score":0.9739999771118164},{"id":"https://openalex.org/keywords/statistical-power","display_name":"statistical power","score":0.7139999866485596},{"id":"https://openalex.org/keywords/study-planning","display_name":"learning planning","score":0.7059999704360962}],"concepts":[{"id":"https://openalex.org/C129848803","wikidata":"https://www.wikidata.org/wiki/Q2564360","display_name":"Sample size determination","level":2,"score":0.8600994944572449},{"id":"https://openalex.org/C198531522","wikidata":"https://www.wikidata.org/wiki/Q485146","display_name":"Sample (material)","level":2,"score":0.6054138541221619},{"id":"https://openalex.org/C23131810","wikidata":"https://www.wikidata.org/wiki/Q818574","display_name":"Observational study","level":2,"score":0.568426787853241},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.479882150888443},{"id":"https://openalex.org/C107130276","wikidata":"https://www.wikidata.org/wiki/Q133805","display_name":"Epidemiology","level":2,"score":0.43586423993110657},{"id":"https://openalex.org/C2776502983","wikidata":"https://www.wikidata.org/wiki/Q690182","display_name":"Contrast (vision)","level":2,"score":0.4168819785118103},{"id":"https://openalex.org/C15744967","wikidata":"https://www.wikidata.org/wiki/Q9418","display_name":"Psychology","level":0,"score":0.3819160759449005},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.3760668933391571},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.31519126892089844},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3013975918292999},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.10135680437088013},{"id":"https://openalex.org/C142724271","wikidata":"https://www.wikidata.org/wiki/Q7208","display_name":"Pathology","level":1,"score":0.08511394262313843},{"id":"https://openalex.org/C43617362","wikidata":"https://www.wikidata.org/wiki/Q170050","display_name":"Chromatography","level":1,"score":0.0},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:CiteSeerX.psu:10.1.1.552.2174","doi":null,"is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.552.2174","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://www.gerontologija.lt/files/edit_files/File/pdf/2006/nr_4/2006_225_231.pdf","raw_type":"text"},{"id":"mag:124841179","doi":null,"is_oa":false,"landing_page_url":"https://www.researchgate.net/profile/Vytautas_Kasiulevicius2/publication/254847492_Sample_size_calculation_in_epidemiological_studies/links/552d401e0cf2e089a3ad5020.pdf","pdf_url":null,"source":null,"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/3","score":0.7246000170707703,"display_name":"Good health and well-being"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":15,"referenced_works":["https://openalex.org/W1608258930","https://openalex.org/W1963531169","https://openalex.org/W1964100346","https://openalex.org/W1984170705","https://openalex.org/W2049509720","https://openalex.org/W2066382523","https://openalex.org/W2095687684","https://openalex.org/W2142960568","https://openalex.org/W2147581820","https://openalex.org/W2150290224","https://openalex.org/W2161565033","https://openalex.org/W2167990168","https://openalex.org/W2517346518","https://openalex.org/W2795740701","https://openalex.org/W4239011888"],"related_works":["https://openalex.org/W7100660865","https://openalex.org/W3014128908","https://openalex.org/W2132073384","https://openalex.org/W4416789207","https://openalex.org/W2343188697","https://openalex.org/W3011884654","https://openalex.org/W3005251472","https://openalex.org/W150713168","https://openalex.org/W137138772","https://openalex.org/W2463303017"],"abstract_inverted_index":{"Sample-size":[0],"determination":[1],"is":[2],"often":[3],"an":[4,9,56],"important":[5],"step":[6],"in":[7,55],"planning":[8],"epidemiological":[10,57],"study.":[11,27],"There":[12],"are":[13],"several":[14],"approaches":[15],"to":[16,37,51,70],"determining":[17],"sample":[18,39,53],"size.":[19,40],"It":[20],"depends":[21],"on":[22],"the":[23,26,46,71],"type":[24],"of":[25,73],"Descriptive,":[28],"observational":[29],"and":[30],"randomized":[31],"controlled":[32],"studies":[33],"have":[34],"different":[35],"formulas":[36,47],"calculate":[38],"In":[41],"this":[42,74],"article,":[43],"we":[44],"discuss":[45],"that":[48],"can":[49],"help":[50],"estimate":[52],"size":[54],"trial.":[58],"We":[59],"present":[60],"a":[61],"few":[62],"examples":[63],"from":[64],"clinical":[65],"practice,":[66],"which":[67],"may":[68],"contribute":[69],"understanding":[72],"problem.":[75]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":4},{"year":2024,"cited_by_count":20},{"year":2023,"cited_by_count":28},{"year":2022,"cited_by_count":25},{"year":2021,"cited_by_count":33},{"year":2020,"cited_by_count":30},{"year":2019,"cited_by_count":17},{"year":2018,"cited_by_count":14},{"year":2017,"cited_by_count":20},{"year":2016,"cited_by_count":11},{"year":2015,"cited_by_count":9},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":4},{"year":2012,"cited_by_count":4}],"updated_date":"2026-11-08T12:12:28.789561","created_date":"2016-06-24T00:00:00"}