{"id":"https://openalex.org/W2522013441","doi":"https://doi.org/10.1515/cclm-2016-0284","title":"Peer groups splitting in Croatian EQA scheme: a trade-off between homogeneity and sample size number","display_name":"Peer groups splitting in Croatian EQA scheme: a trade-off between homogeneity and sample size number","publication_year":2016,"publication_date":"2016-09-22","ids":{"openalex":"https://openalex.org/W2522013441","doi":"https://doi.org/10.1515/cclm-2016-0284","mag":"2522013441","pmid":"https://pubmed.ncbi.nlm.nih.gov/27658147"},"language":"en","primary_location":{"id":"doi:10.1515/cclm-2016-0284","doi":"https://doi.org/10.1515/cclm-2016-0284","is_oa":false,"landing_page_url":"https://doi.org/10.1515/cclm-2016-0284","pdf_url":null,"source":{"id":"https://openalex.org/S124948411","display_name":"Clinical Chemistry and Laboratory Medicine (CCLM)","issn_l":"1434-6621","issn":["1434-6621","1437-4331"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","doyens","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310313990","host_organization_name":"De Gruyter","host_organization_lineage":["https://openalex.org/P4310313990"],"host_organization_lineage_names":["De Gruyter"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Clinical Chemistry and Laboratory Medicine (CCLM)","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","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/A5005451431","display_name":"Jelena Vla\u0161i\u0107 Tanaskovi\u0107","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4405262744","display_name":"Op\u0107a bolnica Pula","ror":"https://ror.org/04z13yw48","country_code":"HR","type":"healthcare","lineage":["https://openalex.org/I4405262744"]},{"id":"https://openalex.org/I4405266756","display_name":"Croatian Society for Medical Biochemistry and Laboratory Medicine","ror":"https://ror.org/05c1dvt40","country_code":"HR","type":"other","lineage":["https://openalex.org/I4405266756"]}],"countries":["HR"],"is_corresponding":true,"raw_author_name":"Jelena Vla\u0161i\u0107 Tanaskovi\u0107","raw_affiliation_strings":["Croatia n Centre for Quality Assessment in Laboratory Medicine (CROQALM), Croatia n Society of Medical Biochemistry and Laboratory Medicine, Zagreb, Croatia","Department of Laboratory Diagnostics, General Hospital Pula, Zagreba\u010dka 30, 52100 Pula, Croatia, Phone: +385 52 376 811"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Croatia n Centre for Quality Assessment in Laboratory Medicine (CROQALM), Croatia n Society of Medical Biochemistry and Laboratory Medicine, Zagreb, Croatia","institution_ids":["https://openalex.org/I4405266756"]},{"raw_affiliation_string":"Department of Laboratory Diagnostics, General Hospital Pula, Zagreba\u010dka 30, 52100 Pula, Croatia, Phone: +385 52 376 811","institution_ids":["https://openalex.org/I4405262744"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5064590176","display_name":"Wim Coucke","orcid":"https://orcid.org/0000-0002-4290-4628","observed_orcids":["https://orcid.org/0000-0002-4290-4628"]},"institutions":[{"id":"https://openalex.org/I4210158280","display_name":"Institut Scientifique de Sant\u00e9 Publique","ror":"https://ror.org/04ws26165","country_code":"BE","type":"facility","lineage":["https://openalex.org/I4210158280"]}],"countries":["BE"],"is_corresponding":false,"raw_author_name":"Wim Coucke","raw_affiliation_strings":["Quality of Medical Laboratories, Scientific Institute of Public Health, Brussels, Belgium"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Quality of Medical Laboratories, Scientific Institute of Public Health, Brussels, Belgium","institution_ids":["https://openalex.org/I4210158280"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5085634919","display_name":"Jasna Leni\u010dek Krle\u017ea","orcid":"https://orcid.org/0000-0002-2554-4034","observed_orcids":["https://orcid.org/0000-0002-2554-4034"]},"institutions":[{"id":"https://openalex.org/I4210137817","display_name":"Children's Hospital Zagreb","ror":"https://ror.org/03rmwy138","country_code":"HR","type":"healthcare","lineage":["https://openalex.org/I4210137817"]},{"id":"https://openalex.org/I4405266756","display_name":"Croatian Society for Medical Biochemistry and Laboratory Medicine","ror":"https://ror.org/05c1dvt40","country_code":"HR","type":"other","lineage":["https://openalex.org/I4405266756"]}],"countries":["HR"],"is_corresponding":false,"raw_author_name":"Jasna Leni\u010dek Krle\u017ea","raw_affiliation_strings":["Croatia n Centre for Quality Assessment in Laboratory Medicine (CROQALM), Croatia n Society of Medical Biochemistry and Laboratory Medicine, Zagreb, Croatia","Department of Laboratory Diagnostics, Children\u2019s Hospital Zagreb, Zagreb, Croatia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Croatia n Centre for Quality Assessment in Laboratory Medicine (CROQALM), Croatia n Society of Medical Biochemistry and Laboratory Medicine, Zagreb, Croatia","institution_ids":["https://openalex.org/I4405266756"]},{"raw_affiliation_string":"Department of Laboratory Diagnostics, Children\u2019s Hospital Zagreb, Zagreb, Croatia","institution_ids":["https://openalex.org/I4210137817"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5048071369","display_name":"Jadranka Vukovi\u0107 Rodr\u00edguez","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I181343428","display_name":"University of Zagreb","ror":"https://ror.org/00mv6sv71","country_code":"HR","type":"education","lineage":["https://openalex.org/I181343428"]}],"countries":["HR"],"is_corresponding":false,"raw_author_name":"Jadranka Vukovi\u0107 Rodriguez","raw_affiliation_strings":["Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia","institution_ids":["https://openalex.org/I181343428"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":5,"corresponding_author_ids":["https://openalex.org/A5005451431"],"corresponding_institution_ids":["https://openalex.org/I4405262744","https://openalex.org/I4405266756"],"apc_list":{"value":2400,"currency":"EUR","value_usd":2712},"apc_paid":null,"fwci":1.3218,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.8052677,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":91,"max":95},"biblio":{"volume":"55","issue":"4","first_page":"539","last_page":"545"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11314","display_name":"Clinical Laboratory Practices and Quality Control","score":0.9984999895095825,"subfield":{"id":"https://openalex.org/subfields/3607","display_name":"Medical Laboratory Technology"},"field":{"id":"https://openalex.org/fields/36","display_name":"Health Professions"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T11314","display_name":"Clinical Laboratory Practices and Quality Control","score":0.9984999895095825,"subfield":{"id":"https://openalex.org/subfields/3607","display_name":"Medical Laboratory Technology"},"field":{"id":"https://openalex.org/fields/36","display_name":"Health Professions"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11890","display_name":"Scientific Measurement and Uncertainty Evaluation","score":0.0006000000284984708,"subfield":{"id":"https://openalex.org/subfields/3105","display_name":"Instrumentation"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13309","display_name":"Reliability and Agreement in Measurement","score":9.999999747378752e-05,"subfield":{"id":"https://openalex.org/subfields/1804","display_name":"Statistics, Probability and Uncertainty"},"field":{"id":"https://openalex.org/fields/18","display_name":"Decision Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/external-quality-assessment","display_name":"external quality assessment","score":0.9779999852180481},{"id":"https://openalex.org/keywords/manova","display_name":"multivariate analysis of variance","score":0.7649999856948853},{"id":"https://openalex.org/keywords/sample-size-calculation","display_name":"sample size determination","score":0.8320000171661377},{"id":"https://openalex.org/keywords/matrix-effects","display_name":"matrix effects","score":0.6800000071525574}],"concepts":[{"id":"https://openalex.org/C2778618615","wikidata":"https://www.wikidata.org/wiki/Q4008393","display_name":"External quality assessment","level":2,"score":0.859434187412262},{"id":"https://openalex.org/C2777548347","wikidata":"https://www.wikidata.org/wiki/Q5456937","display_name":"Flagging","level":2,"score":0.8527648448944092},{"id":"https://openalex.org/C192424360","wikidata":"https://www.wikidata.org/wiki/Q929408","display_name":"Multivariate analysis of variance","level":2,"score":0.6973499059677124},{"id":"https://openalex.org/C129848803","wikidata":"https://www.wikidata.org/wiki/Q2564360","display_name":"Sample size determination","level":2,"score":0.5980203747749329},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.5806602239608765},{"id":"https://openalex.org/C10390740","wikidata":"https://www.wikidata.org/wiki/Q2282401","display_name":"Analyte","level":2,"score":0.5186271071434021},{"id":"https://openalex.org/C196083921","wikidata":"https://www.wikidata.org/wiki/Q7915758","display_name":"Variance (accounting)","level":2,"score":0.41800352931022644},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.4019993245601654},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3517593443393707},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.3332662582397461},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.13467997312545776},{"id":"https://openalex.org/C142724271","wikidata":"https://www.wikidata.org/wiki/Q7208","display_name":"Pathology","level":1,"score":0.12015068531036377},{"id":"https://openalex.org/C43617362","wikidata":"https://www.wikidata.org/wiki/Q170050","display_name":"Chromatography","level":1,"score":0.11429280042648315},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.09998878836631775},{"id":"https://openalex.org/C166957645","wikidata":"https://www.wikidata.org/wiki/Q23498","display_name":"Archaeology","level":1,"score":0.0},{"id":"https://openalex.org/C121955636","wikidata":"https://www.wikidata.org/wiki/Q4116214","display_name":"Accounting","level":1,"score":0.0},{"id":"https://openalex.org/C144133560","wikidata":"https://www.wikidata.org/wiki/Q4830453","display_name":"Business","level":0,"score":0.0}],"mesh":[{"descriptor_ui":"D006801","descriptor_name":"Humans","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D007753","descriptor_name":"Laboratories","qualifier_ui":"Q000592","qualifier_name":"standards","is_major_topic":true},{"descriptor_ui":"D010379","descriptor_name":"Peer Group","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D011785","descriptor_name":"Quality Assurance, Health Care","qualifier_ui":"Q000592","qualifier_name":"standards","is_major_topic":true},{"descriptor_ui":"D011786","descriptor_name":"Quality Control","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012016","descriptor_name":"Reference Values","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D017523","descriptor_name":"Croatia","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D019411","descriptor_name":"Clinical Laboratory Techniques","qualifier_ui":"Q000592","qualifier_name":"standards","is_major_topic":true},{"descriptor_ui":"D059021","descriptor_name":"Laboratory Proficiency Testing","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false}],"locations_count":2,"locations":[{"id":"doi:10.1515/cclm-2016-0284","doi":"https://doi.org/10.1515/cclm-2016-0284","is_oa":false,"landing_page_url":"https://doi.org/10.1515/cclm-2016-0284","pdf_url":null,"source":{"id":"https://openalex.org/S124948411","display_name":"Clinical Chemistry and Laboratory Medicine (CCLM)","issn_l":"1434-6621","issn":["1434-6621","1437-4331"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","doyens","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310313990","host_organization_name":"De Gruyter","host_organization_lineage":["https://openalex.org/P4310313990"],"host_organization_lineage_names":["De Gruyter"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Clinical Chemistry and Laboratory Medicine (CCLM)","raw_type":"journal-article"},{"id":"pmid:27658147","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/27658147","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":"Clinical chemistry and laboratory medicine","raw_type":"Journal Article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/3","score":0.46810001134872437,"display_name":"Good health and well-being"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":14,"referenced_works":["https://openalex.org/W73962157","https://openalex.org/W1486384084","https://openalex.org/W1985103439","https://openalex.org/W2027130139","https://openalex.org/W2033045974","https://openalex.org/W2053931529","https://openalex.org/W2055554761","https://openalex.org/W2059439688","https://openalex.org/W2108969048","https://openalex.org/W2128255624","https://openalex.org/W2143876613","https://openalex.org/W2152615884","https://openalex.org/W2246273813","https://openalex.org/W2746978354"],"related_works":["https://openalex.org/W7212243886","https://openalex.org/W2586085748","https://openalex.org/W2746406458","https://openalex.org/W2222775008","https://openalex.org/W2157716827","https://openalex.org/W1604466531","https://openalex.org/W7171541891","https://openalex.org/W2123374019","https://openalex.org/W4205852726","https://openalex.org/W2903958161"],"abstract_inverted_index":{"BACKGROUND:":[0],"Laboratory":[1],"evaluation":[2,171,241],"through":[3],"external":[4],"quality":[5],"assessment":[6],"(EQA)":[7],"schemes":[8,44],"is":[9],"often":[10],"performed":[11],"as":[12,205,207],"'peer":[13],"group'":[14],"comparison":[15],"under":[16],"the":[17,23,92,120,149,202],"assumption":[18],"that":[19,45],"matrix":[20],"effects":[21],"influence":[22],"comparisons":[24],"between":[25,130,163,218],"results":[26,70,110,198],"of":[27,69,81,88,134,145,169,190,195],"different":[28],"methods,":[29],"for":[30,57,187,209,246],"analytes":[31],"where":[32,100,236],"no":[33],"commutable":[34],"materials":[35],"with":[36,66,201],"reference":[37],"value":[38],"assignment":[39],"are":[40,46],"available.":[41],"With":[42],"EQA":[43,94,108,251],"not":[47,155],"large":[48],"but":[49],"have":[50],"many":[51],"available":[52],"instruments":[53,115],"and":[54,97,119,147,230,242],"reagent":[55],"options":[56],"same":[58],"analyte,":[59],"homogenous":[60],"peer":[61,89,181,234,247],"groups":[62,90,99,235],"must":[63],"be":[64],"created":[65],"adequate":[67],"number":[68,133],"to":[71,85,114,125,153],"enable":[72],"satisfactory":[73],"statistical":[74],"evaluation.":[75,106],"We":[76],"proposed":[77],"a":[78,143],"multivariate":[79],"analysis":[80],"variance":[82],"(MANOVA)-based":[83],"test":[84,122],"evaluate":[86],"heterogeneity":[87,249],"within":[91,250],"Croatian":[93],"biochemistry":[95,109],"scheme":[96],"identify":[98],"further":[101,188,237],"splitting":[102,175,189,238],"might":[103],"improve":[104],"laboratory":[105,170,240],"METHODS:":[107],"were":[111,165,199],"divided":[112],"according":[113],"used":[116,124],"per":[117],"analyte":[118],"MANOVA":[121],"was":[123,136,172],"verify":[126],"statistically":[127,160],"significant":[128,161],"differences":[129,162,217],"subgroups.":[131],"The":[132],"samples":[135],"determined":[137],"by":[138,226],"sample":[139,227],"size":[140,228],"calculation":[141],"ensuring":[142],"power":[144],"90%":[146],"allowing":[148],"false":[150],"flagging":[151,222],"rate":[152,223],"increase":[154],"more":[156],"than":[157],"5%.":[158],"When":[159],"subgroups":[164,219],"found,":[166],"clear":[167],"improvement":[168,194],"assessed":[173],"before":[174],"groups.":[176,192],"RESULTS:":[177],"After":[178],"evaluating":[179],"29":[180],"groups,":[182],"we":[183],"found":[184],"strong":[185],"evidence":[186],"six":[191],"Overall":[193],"6%":[196],"reported":[197],"observed,":[200],"percentage":[203],"being":[204],"high":[206],"27.4%":[208],"one":[210],"particular":[211],"method.":[212],"CONCLUSIONS:":[213],"Defining":[214],"maximal":[215],"allowable":[216],"based":[220],"on":[221],"change,":[224],"followed":[225],"planning":[229],"MANOVA,":[231],"identifies":[232],"heterogeneous":[233],"improves":[239],"enables":[243],"continuous":[244],"monitoring":[245],"group":[248],"schemes.":[252]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2019,"cited_by_count":2}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-09-30T00:00:00"}
