{"id":"https://openalex.org/W2072551685","doi":"https://doi.org/10.1016/j.ajog.2006.10.893","title":"Risk factors for primary and subsequent anal sphincter lacerations: a comparison of cohorts by parity and prior mode of delivery","display_name":"Risk factors for primary and subsequent anal sphincter lacerations: a comparison of cohorts by parity and prior mode of delivery","publication_year":2007,"publication_date":"2007-04-01","ids":{"openalex":"https://openalex.org/W2072551685","doi":"https://doi.org/10.1016/j.ajog.2006.10.893","mag":"2072551685","pmid":"https://pubmed.ncbi.nlm.nih.gov/17403415"},"language":"en","primary_location":{"id":"doi:10.1016/j.ajog.2006.10.893","doi":"https://doi.org/10.1016/j.ajog.2006.10.893","is_oa":false,"landing_page_url":"https://doi.org/10.1016/j.ajog.2006.10.893","pdf_url":null,"source":{"id":"https://openalex.org/S122347013","display_name":"American Journal of Obstetrics and Gynecology","issn_l":"0002-9378","issn":["0002-9378","1085-8709","1097-6868"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","doyens","jufo-3","ki-jl-3","medline","norway-2","poland-140","russia-white-list-1","vabb-shw"],"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":"American Journal of Obstetrics and Gynecology","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/A5025942222","display_name":"Jerry L. Lowder","orcid":"https://orcid.org/0000-0003-1065-4537","observed_orcids":["https://orcid.org/0000-0003-1065-4537"]},"institutions":[{"id":"https://openalex.org/I170201317","display_name":"University of Pittsburgh","ror":"https://ror.org/01an3r305","country_code":"US","type":"education","lineage":["https://openalex.org/I170201317"]},{"id":"https://openalex.org/I4210106153","display_name":"Magee-Womens Hospital","ror":"https://ror.org/01fbdn283","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210098814","https://openalex.org/I4210106153","https://openalex.org/I4210134769"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Jerry L. Lowder","raw_affiliation_strings":["Division of Urogynecology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA","Division of Urogynecology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Division of Urogynecology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA","institution_ids":["https://openalex.org/I170201317","https://openalex.org/I4210106153"]},{"raw_affiliation_string":"Division of Urogynecology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA","institution_ids":["https://openalex.org/I170201317","https://openalex.org/I4210106153"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5057361811","display_name":"Lara J. Burrows","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I170201317","display_name":"University of Pittsburgh","ror":"https://ror.org/01an3r305","country_code":"US","type":"education","lineage":["https://openalex.org/I170201317"]},{"id":"https://openalex.org/I4210106153","display_name":"Magee-Womens Hospital","ror":"https://ror.org/01fbdn283","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210098814","https://openalex.org/I4210106153","https://openalex.org/I4210134769"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Lara J. Burrows","raw_affiliation_strings":["Division of Urogynecology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Division of Urogynecology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA","institution_ids":["https://openalex.org/I170201317","https://openalex.org/I4210106153"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5028416671","display_name":"Marijane A. Krohn","orcid":"https://orcid.org/0000-0002-5014-8017","observed_orcids":["https://orcid.org/0000-0002-5014-8017"]},"institutions":[{"id":"https://openalex.org/I170201317","display_name":"University of Pittsburgh","ror":"https://ror.org/01an3r305","country_code":"US","type":"education","lineage":["https://openalex.org/I170201317"]},{"id":"https://openalex.org/I4210106153","display_name":"Magee-Womens Hospital","ror":"https://ror.org/01fbdn283","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210098814","https://openalex.org/I4210106153","https://openalex.org/I4210134769"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Marijane A. Krohn","raw_affiliation_strings":["Division of Obstetric and Gynecologic Infectious Disease, Department of Obstetrics, Gynecology, and Reproductive Sciences, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Division of Obstetric and Gynecologic Infectious Disease, Department of Obstetrics, Gynecology, and Reproductive Sciences, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA","institution_ids":["https://openalex.org/I170201317","https://openalex.org/I4210106153"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5111920225","display_name":"Anne M. Weber","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I170201317","display_name":"University of Pittsburgh","ror":"https://ror.org/01an3r305","country_code":"US","type":"education","lineage":["https://openalex.org/I170201317"]},{"id":"https://openalex.org/I4210106153","display_name":"Magee-Womens Hospital","ror":"https://ror.org/01fbdn283","country_code":"US","type":"healthcare","lineage":["https://openalex.org/I4210098814","https://openalex.org/I4210106153","https://openalex.org/I4210134769"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Anne M. Weber","raw_affiliation_strings":["Division of Urogynecology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Division of Urogynecology, Department of Obstetrics, Gynecology, and Reproductive Sciences, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, PA","institution_ids":["https://openalex.org/I170201317","https://openalex.org/I4210106153"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":5410,"currency":"USD","value_usd":5410},"apc_paid":null,"fwci":8.7372,"has_fulltext":false,"cited_by_count":151,"citation_normalized_percentile":{"value":0.98042607,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":93,"max":100},"biblio":{"volume":"196","issue":"4","first_page":"344.e1","last_page":"344.e5"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10418","display_name":"Pelvic floor disorders treatments","score":0.6685000061988831,"subfield":{"id":"https://openalex.org/subfields/2748","display_name":"Urology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T10418","display_name":"Pelvic floor disorders treatments","score":0.6685000061988831,"subfield":{"id":"https://openalex.org/subfields/2748","display_name":"Urology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T10453","display_name":"Maternal and Perinatal Health Interventions","score":0.3059000074863434,"subfield":{"id":"https://openalex.org/subfields/2729","display_name":"Obstetrics and Gynecology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11389","display_name":"Maternal and fetal healthcare","score":0.0032999999821186066,"subfield":{"id":"https://openalex.org/subfields/2735","display_name":"Pediatrics, Perinatology and Child Health"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/perineal-trauma","display_name":"perineal trauma","score":0.7960000038146973},{"id":"https://openalex.org/keywords/vaginal-delivery","display_name":"vaginal delivery","score":0.6380000114440918},{"id":"https://openalex.org/keywords/vaginal-birth-after-cesarean","display_name":"vaginal birth after cesarean","score":0.906000018119812},{"id":"https://openalex.org/keywords/parity","display_name":"parity","score":0.9179999828338623},{"id":"https://openalex.org/keywords/mode-of-delivery","display_name":"mode of delivery","score":0.8389999866485596},{"id":"https://openalex.org/keywords/forceps-delivery","display_name":"forceps delivery","score":0.6230000257492065},{"id":"https://openalex.org/keywords/vacuum-extraction","display_name":"vacuum extraction","score":0.9369999766349792},{"id":"https://openalex.org/keywords/episiotomy","display_name":"episiotomy","score":0.9229999780654907},{"id":"https://openalex.org/keywords/birth-weight","display_name":"birth weight","score":0.7910000085830688},{"id":"https://openalex.org/keywords/risk-factors","display_name":"risk factors","score":0.8299999833106995},{"id":"https://openalex.org/keywords/pregnancy-complications","display_name":"pregnancy complications","score":0.5759999752044678},{"id":"https://openalex.org/keywords/third-and-fourth-degree-lacerations","display_name":"third- and fourth-degree lacerations","score":0.7680000066757202},{"id":"https://openalex.org/keywords/perinatal-outcomes","display_name":"perinatal outcomes","score":0.4440000057220459},{"id":"https://openalex.org/keywords/maternal-outcomes","display_name":"maternal outcomes","score":0.32899999618530273},{"id":"https://openalex.org/keywords/neonatal-outcomes","display_name":"neonatal outcomes","score":0.6449999809265137},{"id":"https://openalex.org/keywords/maternal-morbidity","display_name":"maternal morbidity","score":0.5830000042915344}],"concepts":[{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.9490792751312256},{"id":"https://openalex.org/C2777151079","wikidata":"https://www.wikidata.org/wiki/Q141160","display_name":"Parity (physics)","level":2,"score":0.7260469794273376},{"id":"https://openalex.org/C2993285706","wikidata":"https://www.wikidata.org/wiki/Q4751007","display_name":"Anal sphincter","level":2,"score":0.6119858622550964},{"id":"https://openalex.org/C131872663","wikidata":"https://www.wikidata.org/wiki/Q5284418","display_name":"Obstetrics","level":1,"score":0.38745808601379395},{"id":"https://openalex.org/C141071460","wikidata":"https://www.wikidata.org/wiki/Q40821","display_name":"Surgery","level":1,"score":0.298696905374527},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C109214941","wikidata":"https://www.wikidata.org/wiki/Q18334","display_name":"Particle physics","level":1,"score":0.0}],"mesh":[{"descriptor_ui":"D000328","descriptor_name":"Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D001003","descriptor_name":"Anal Canal","qualifier_ui":"Q000293","qualifier_name":"injuries","is_major_topic":true},{"descriptor_ui":"D004841","descriptor_name":"Episiotomy","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D005260","descriptor_name":"Female","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D005500","descriptor_name":"Follow-Up Studies","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":"D010298","descriptor_name":"Parity","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D011247","descriptor_name":"Pregnancy","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":"D012307","descriptor_name":"Risk Factors","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D015331","descriptor_name":"Cohort Studies","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D015601","descriptor_name":"Injury Severity Score","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D015994","descriptor_name":"Incidence","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D016015","descriptor_name":"Logistic Models","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D016017","descriptor_name":"Odds Ratio","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D016064","descriptor_name":"Vaginal Birth after Cesarean","qualifier_ui":"Q000009","qualifier_name":"adverse effects","is_major_topic":false},{"descriptor_ui":"D016064","descriptor_name":"Vaginal Birth after Cesarean","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":false},{"descriptor_ui":"D022125","descriptor_name":"Lacerations","qualifier_ui":"Q000209","qualifier_name":"etiology","is_major_topic":true},{"descriptor_ui":"D022125","descriptor_name":"Lacerations","qualifier_ui":"Q000453","qualifier_name":"epidemiology","is_major_topic":true},{"descriptor_ui":"D022125","descriptor_name":"Lacerations","qualifier_ui":"Q000503","qualifier_name":"physiopathology","is_major_topic":false},{"descriptor_ui":"D036861","descriptor_name":"Delivery, Obstetric","qualifier_ui":"Q000009","qualifier_name":"adverse effects","is_major_topic":true},{"descriptor_ui":"D036861","descriptor_name":"Delivery, Obstetric","qualifier_ui":"Q000379","qualifier_name":"methods","is_major_topic":true},{"descriptor_ui":"D055502","descriptor_name":"Secondary Prevention","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false}],"locations_count":3,"locations":[{"id":"doi:10.1016/j.ajog.2006.10.893","doi":"https://doi.org/10.1016/j.ajog.2006.10.893","is_oa":false,"landing_page_url":"https://doi.org/10.1016/j.ajog.2006.10.893","pdf_url":null,"source":{"id":"https://openalex.org/S122347013","display_name":"American Journal of Obstetrics and Gynecology","issn_l":"0002-9378","issn":["0002-9378","1085-8709","1097-6868"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","doyens","jufo-3","ki-jl-3","medline","norway-2","poland-140","russia-white-list-1","vabb-shw"],"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":"American Journal of Obstetrics and Gynecology","raw_type":"journal-article"},{"id":"pmid:17403415","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/17403415","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":"American journal of obstetrics and gynecology","raw_type":"Journal Article"},{"id":"pmid:18060988","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/18060988","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":"American journal of obstetrics and gynecology","raw_type":"Comment"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/3","display_name":"Good health and well-being","score":1.0}],"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":18,"referenced_works":["https://openalex.org/W1963490254","https://openalex.org/W1964216105","https://openalex.org/W2006015225","https://openalex.org/W2007688780","https://openalex.org/W2009831907","https://openalex.org/W2010399082","https://openalex.org/W2020540639","https://openalex.org/W2021393841","https://openalex.org/W2038089356","https://openalex.org/W2038485025","https://openalex.org/W2043593925","https://openalex.org/W2059315591","https://openalex.org/W2081434828","https://openalex.org/W2084793753","https://openalex.org/W2090742591","https://openalex.org/W2102590703","https://openalex.org/W2244324403","https://openalex.org/W4285719527"],"related_works":["https://openalex.org/W2005944000","https://openalex.org/W2080769215","https://openalex.org/W2081434828","https://openalex.org/W2038524567","https://openalex.org/W2024757756","https://openalex.org/W4280636729","https://openalex.org/W174768447","https://openalex.org/W2078119249","https://openalex.org/W1963490254","https://openalex.org/W2005983660"],"abstract_inverted_index":null,"counts_by_year":[{"year":2025,"cited_by_count":2},{"year":2024,"cited_by_count":5},{"year":2023,"cited_by_count":4},{"year":2022,"cited_by_count":7},{"year":2021,"cited_by_count":6},{"year":2020,"cited_by_count":13},{"year":2019,"cited_by_count":12},{"year":2018,"cited_by_count":11},{"year":2017,"cited_by_count":6},{"year":2016,"cited_by_count":8},{"year":2015,"cited_by_count":16},{"year":2014,"cited_by_count":8},{"year":2013,"cited_by_count":10},{"year":2012,"cited_by_count":9}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}
