{"id":"https://openalex.org/W2132399252","doi":"https://doi.org/10.1016/s0169-2607(01)00149-3","title":"SAS and SPLUS programs to perform Cox regression without convergence problems","display_name":"SAS and SPLUS programs to perform Cox regression without convergence problems","publication_year":2002,"publication_date":"2002-03-01","ids":{"openalex":"https://openalex.org/W2132399252","doi":"https://doi.org/10.1016/s0169-2607(01)00149-3","mag":"2132399252","pmid":"https://pubmed.ncbi.nlm.nih.gov/11853948"},"language":"en","primary_location":{"id":"doi:10.1016/s0169-2607(01)00149-3","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0169-2607(01)00149-3","pdf_url":null,"source":{"id":"https://openalex.org/S138959710","display_name":"Computer Methods and Programs in Biomedicine","issn_l":"0169-2607","issn":["0169-2607","1872-7565"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Computer Methods and Programs in Biomedicine","raw_type":"journal-article"},"type":"article","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/A5040146633","display_name":"Georg Heinze","orcid":"https://orcid.org/0000-0003-1147-8491"},"institutions":[{"id":"https://openalex.org/I76134821","display_name":"Medical University of Vienna","ror":"https://ror.org/05n3x4p02","country_code":"AT","type":"education","lineage":["https://openalex.org/I76134821"]}],"countries":["AT"],"is_corresponding":true,"raw_author_name":"Georg Heinze","raw_affiliation_strings":["Department of Medical Computer Sciences, University of Vienna, A-1090 Vienna, Spitalgasse 23, Austria. georg.heinze@akh-wien.ac.at","Department of Medical Computer Sciences, University of Vienna, A-1090 Vienna, Spitalgasse 23, Austria"],"affiliations":[{"raw_affiliation_string":"Department of Medical Computer Sciences, University of Vienna, A-1090 Vienna, Spitalgasse 23, Austria. georg.heinze@akh-wien.ac.at","institution_ids":["https://openalex.org/I76134821"]},{"raw_affiliation_string":"Department of Medical Computer Sciences, University of Vienna, A-1090 Vienna, Spitalgasse 23, Austria","institution_ids":["https://openalex.org/I76134821"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5012231686","display_name":"Meinhard Ploner","orcid":null},"institutions":[{"id":"https://openalex.org/I76134821","display_name":"Medical University of Vienna","ror":"https://ror.org/05n3x4p02","country_code":"AT","type":"education","lineage":["https://openalex.org/I76134821"]}],"countries":["AT"],"is_corresponding":false,"raw_author_name":"Meinhard Ploner","raw_affiliation_strings":["Department of Medical Computer Sciences, University of Vienna, A-1090 Vienna, Spitalgasse 23, Austria"],"affiliations":[{"raw_affiliation_string":"Department of Medical Computer Sciences, University of Vienna, A-1090 Vienna, Spitalgasse 23, Austria","institution_ids":["https://openalex.org/I76134821"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5040146633"],"corresponding_institution_ids":["https://openalex.org/I76134821"],"apc_list":{"value":2880,"currency":"USD","value_usd":2880},"apc_paid":null,"fwci":0.3856,"has_fulltext":false,"cited_by_count":30,"citation_normalized_percentile":{"value":0.65900284,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":"67","issue":"3","first_page":"217","last_page":"223"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10136","display_name":"Statistical Methods and Inference","score":0.9980000257492065,"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/T10136","display_name":"Statistical Methods and Inference","score":0.9980000257492065,"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/T10243","display_name":"Statistical Methods and Bayesian Inference","score":0.9901999831199646,"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":0.9596999883651733,"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/proportional-hazards-model","display_name":"Proportional hazards model","score":0.5488168597221375},{"id":"https://openalex.org/keywords/biometrics","display_name":"Biometrics","score":0.5477062463760376},{"id":"https://openalex.org/keywords/regression-analysis","display_name":"Regression analysis","score":0.5405816435813904},{"id":"https://openalex.org/keywords/monotone-polygon","display_name":"Monotone polygon","score":0.5402739644050598},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5129086971282959},{"id":"https://openalex.org/keywords/likelihood-function","display_name":"Likelihood function","score":0.4845218062400818},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.481539785861969},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.45571446418762207},{"id":"https://openalex.org/keywords/regression","display_name":"Regression","score":0.4371550977230072},{"id":"https://openalex.org/keywords/expectation\u2013maximization-algorithm","display_name":"Expectation\u2013maximization algorithm","score":0.43555518984794617},{"id":"https://openalex.org/keywords/applied-mathematics","display_name":"Applied mathematics","score":0.43116873502731323},{"id":"https://openalex.org/keywords/software","display_name":"Software","score":0.41846203804016113},{"id":"https://openalex.org/keywords/confidence-interval","display_name":"Confidence interval","score":0.4136638045310974},{"id":"https://openalex.org/keywords/convergence","display_name":"Convergence (economics)","score":0.4100162386894226},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.3702431917190552},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.37010669708251953},{"id":"https://openalex.org/keywords/estimation-theory","display_name":"Estimation theory","score":0.3526862859725952},{"id":"https://openalex.org/keywords/maximum-likelihood","display_name":"Maximum likelihood","score":0.29092302918434143},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.15528786182403564}],"concepts":[{"id":"https://openalex.org/C50382708","wikidata":"https://www.wikidata.org/wiki/Q223218","display_name":"Proportional hazards model","level":2,"score":0.5488168597221375},{"id":"https://openalex.org/C184297639","wikidata":"https://www.wikidata.org/wiki/Q177765","display_name":"Biometrics","level":2,"score":0.5477062463760376},{"id":"https://openalex.org/C152877465","wikidata":"https://www.wikidata.org/wiki/Q208042","display_name":"Regression analysis","level":2,"score":0.5405816435813904},{"id":"https://openalex.org/C2834757","wikidata":"https://www.wikidata.org/wiki/Q4925424","display_name":"Monotone polygon","level":2,"score":0.5402739644050598},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5129086971282959},{"id":"https://openalex.org/C89106044","wikidata":"https://www.wikidata.org/wiki/Q45284","display_name":"Likelihood function","level":3,"score":0.4845218062400818},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.481539785861969},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.45571446418762207},{"id":"https://openalex.org/C83546350","wikidata":"https://www.wikidata.org/wiki/Q1139051","display_name":"Regression","level":2,"score":0.4371550977230072},{"id":"https://openalex.org/C182081679","wikidata":"https://www.wikidata.org/wiki/Q1275153","display_name":"Expectation\u2013maximization algorithm","level":3,"score":0.43555518984794617},{"id":"https://openalex.org/C28826006","wikidata":"https://www.wikidata.org/wiki/Q33521","display_name":"Applied mathematics","level":1,"score":0.43116873502731323},{"id":"https://openalex.org/C2777904410","wikidata":"https://www.wikidata.org/wiki/Q7397","display_name":"Software","level":2,"score":0.41846203804016113},{"id":"https://openalex.org/C44249647","wikidata":"https://www.wikidata.org/wiki/Q208498","display_name":"Confidence interval","level":2,"score":0.4136638045310974},{"id":"https://openalex.org/C2777303404","wikidata":"https://www.wikidata.org/wiki/Q759757","display_name":"Convergence (economics)","level":2,"score":0.4100162386894226},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.3702431917190552},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.37010669708251953},{"id":"https://openalex.org/C167928553","wikidata":"https://www.wikidata.org/wiki/Q1376021","display_name":"Estimation theory","level":2,"score":0.3526862859725952},{"id":"https://openalex.org/C49781872","wikidata":"https://www.wikidata.org/wiki/Q1045555","display_name":"Maximum likelihood","level":2,"score":0.29092302918434143},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.15528786182403564},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C50522688","wikidata":"https://www.wikidata.org/wiki/Q189833","display_name":"Economic growth","level":1,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0}],"mesh":[{"descriptor_ui":"D012984","descriptor_name":"Software","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D012984","descriptor_name":"Software","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D012984","descriptor_name":"Software","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D016016","descriptor_name":"Proportional Hazards Models","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D016016","descriptor_name":"Proportional Hazards Models","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D016016","descriptor_name":"Proportional Hazards Models","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D016019","descriptor_name":"Survival Analysis","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D016019","descriptor_name":"Survival Analysis","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D016019","descriptor_name":"Survival Analysis","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true}],"locations_count":2,"locations":[{"id":"doi:10.1016/s0169-2607(01)00149-3","is_oa":false,"landing_page_url":"https://doi.org/10.1016/s0169-2607(01)00149-3","pdf_url":null,"source":{"id":"https://openalex.org/S138959710","display_name":"Computer Methods and Programs in Biomedicine","issn_l":"0169-2607","issn":["0169-2607","1872-7565"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Computer Methods and Programs in Biomedicine","raw_type":"journal-article"},{"id":"pmid:11853948","is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/11853948","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,"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":"Computer methods and programs in biomedicine","raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/16","score":0.5400000214576721,"display_name":"Peace, Justice and strong institutions"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":14,"referenced_works":["https://openalex.org/W44278768","https://openalex.org/W1983060551","https://openalex.org/W2006345809","https://openalex.org/W2078129874","https://openalex.org/W2112600232","https://openalex.org/W2119109249","https://openalex.org/W2136883754","https://openalex.org/W2171720857","https://openalex.org/W2797482815","https://openalex.org/W2995133996","https://openalex.org/W3147894994","https://openalex.org/W4245844897","https://openalex.org/W4285719527","https://openalex.org/W4298170555"],"related_works":["https://openalex.org/W2898901530","https://openalex.org/W4252706329","https://openalex.org/W2160216316","https://openalex.org/W3121212717","https://openalex.org/W2014532259","https://openalex.org/W1964091180","https://openalex.org/W353185590","https://openalex.org/W1934728117","https://openalex.org/W4244733523","https://openalex.org/W1967639437"],"abstract_inverted_index":null,"counts_by_year":[{"year":2023,"cited_by_count":4},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":3},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":2},{"year":2018,"cited_by_count":2},{"year":2017,"cited_by_count":5},{"year":2015,"cited_by_count":2},{"year":2013,"cited_by_count":2},{"year":2012,"cited_by_count":1}],"updated_date":"2026-01-13T01:12:25.745995","created_date":"2025-10-10T00:00:00"}