{"id":"https://openalex.org/W2016434905","doi":"https://doi.org/10.1136/gut.38.3.376","title":"Seasonal variations in the onset of ulcerative colitis.","display_name":"Seasonal variations in the onset of ulcerative colitis.","publication_year":1996,"publication_date":"1996-03-01","ids":{"openalex":"https://openalex.org/W2016434905","doi":"https://doi.org/10.1136/gut.38.3.376","mag":"2016434905","pmid":"https://pubmed.ncbi.nlm.nih.gov/8675089","pmcid":"https://www.ncbi.nlm.nih.gov/pmc/articles/1383065"},"language":"en","primary_location":{"id":"doi:10.1136/gut.38.3.376","doi":"https://doi.org/10.1136/gut.38.3.376","is_oa":true,"landing_page_url":"https://doi.org/10.1136/gut.38.3.376","pdf_url":"https://gut.bmj.com/content/gutjnl/38/3/376.full.pdf","source":{"id":"https://openalex.org/S3251770","display_name":"Gut","issn_l":"0017-5749","issn":["0017-5749","1468-3288"],"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-200","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319945","host_organization_name":"BMJ","host_organization_lineage":["https://openalex.org/P4310319945"],"host_organization_lineage_names":["BMJ"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Gut","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","pubmed"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://gut.bmj.com/content/gutjnl/38/3/376.full.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5021082840","display_name":"Bj\u00f8rn Allan Moum","orcid":"https://orcid.org/0000-0002-5884-4543","observed_orcids":["https://orcid.org/0000-0002-5884-4543"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"B Moum","raw_affiliation_strings":["Ostfold Sentralsykehus, Fredrikstad, Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Ostfold Sentralsykehus, Fredrikstad, Sweden","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5058602623","display_name":"Erling Aadland","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"E Aadland","raw_affiliation_strings":["Ostfold Sentralsykehus, Fredrikstad, Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Ostfold Sentralsykehus, Fredrikstad, Sweden","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5021922777","display_name":"Anders Ekbom","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"A Ekbom","raw_affiliation_strings":["Ostfold Sentralsykehus, Fredrikstad, Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Ostfold Sentralsykehus, Fredrikstad, Sweden","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5000597533","display_name":"M H Vatn","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"M H Vatn","raw_affiliation_strings":["Ostfold Sentralsykehus, Fredrikstad, Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Ostfold Sentralsykehus, Fredrikstad, Sweden","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":true,"cited_by_count":84,"citation_normalized_percentile":{"value":0.15219289,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":91,"max":99},"biblio":{"volume":"38","issue":"3","first_page":"376","last_page":"378"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10134","display_name":"Inflammatory Bowel Disease","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/2715","display_name":"Gastroenterology"},"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/T10134","display_name":"Inflammatory Bowel Disease","score":0.9994999766349792,"subfield":{"id":"https://openalex.org/subfields/2715","display_name":"Gastroenterology"},"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/T11194","display_name":"Ocular Diseases and Beh\u00e7et\u2019s Syndrome","score":9.999999747378752e-05,"subfield":{"id":"https://openalex.org/subfields/2731","display_name":"Ophthalmology"},"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/T13569","display_name":"Microscopic Colitis","score":0.0,"subfield":{"id":"https://openalex.org/subfields/2715","display_name":"Gastroenterology"},"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/ulcerative-colitis","display_name":"ulcerative colitis","score":0.9929999709129333},{"id":"https://openalex.org/keywords/crohn-s-disease","display_name":"Crohn's disease","score":1.0},{"id":"https://openalex.org/keywords/inflammatory-bowel-disease","display_name":"inflammatory bowel disease","score":0.9020000100135803},{"id":"https://openalex.org/keywords/seasonal-variation","display_name":"seasonal variation","score":0.9120000004768372},{"id":"https://openalex.org/keywords/disease-onset","display_name":"disease onset","score":0.777999997138977},{"id":"https://openalex.org/keywords/environmental-factors","display_name":"environmental factors","score":0.4729999899864197},{"id":"https://openalex.org/keywords/winter-seasonality","display_name":"winter seasonality","score":0.3720000088214874}],"concepts":[{"id":"https://openalex.org/C2780479503","wikidata":"https://www.wikidata.org/wiki/Q1477","display_name":"Ulcerative colitis","level":3,"score":0.9396096467971802},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.7565130591392517},{"id":"https://openalex.org/C61511704","wikidata":"https://www.wikidata.org/wiki/Q1671857","display_name":"Incidence (geometry)","level":2,"score":0.7253901362419128},{"id":"https://openalex.org/C2778260677","wikidata":"https://www.wikidata.org/wiki/Q917447","display_name":"Inflammatory bowel disease","level":3,"score":0.6834760308265686},{"id":"https://openalex.org/C126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","level":1,"score":0.6410252451896667},{"id":"https://openalex.org/C125403950","wikidata":"https://www.wikidata.org/wiki/Q2111082","display_name":"Seasonality","level":2,"score":0.6356408596038818},{"id":"https://openalex.org/C90924648","wikidata":"https://www.wikidata.org/wiki/Q120569","display_name":"Gastroenterology","level":1,"score":0.5394606590270996},{"id":"https://openalex.org/C2775862500","wikidata":"https://www.wikidata.org/wiki/Q2453464","display_name":"Colitis","level":2,"score":0.5274714827537537},{"id":"https://openalex.org/C2779134260","wikidata":"https://www.wikidata.org/wiki/Q12136","display_name":"Disease","level":2,"score":0.47921687364578247},{"id":"https://openalex.org/C188816634","wikidata":"https://www.wikidata.org/wiki/Q2113324","display_name":"Prospective cohort study","level":2,"score":0.44588059186935425},{"id":"https://openalex.org/C2777767895","wikidata":"https://www.wikidata.org/wiki/Q4691924","display_name":"Age of onset","level":3,"score":0.441150039434433},{"id":"https://openalex.org/C167135981","wikidata":"https://www.wikidata.org/wiki/Q2146302","display_name":"Retrospective cohort study","level":2,"score":0.4262327551841736},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.07378879189491272},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.0},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0}],"mesh":[{"descriptor_ui":"D000328","descriptor_name":"Adult","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D003093","descriptor_name":"Colitis, Ulcerative","qualifier_ui":"Q000453","qualifier_name":"epidemiology","is_major_topic":true},{"descriptor_ui":"D003424","descriptor_name":"Crohn Disease","qualifier_ui":"Q000453","qualifier_name":"epidemiology","is_major_topic":true},{"descriptor_ui":"D005260","descriptor_name":"Female","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":"D008297","descriptor_name":"Male","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D008875","descriptor_name":"Middle Aged","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D011446","descriptor_name":"Prospective Studies","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012008","descriptor_name":"Recurrence","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false},{"descriptor_ui":"D012621","descriptor_name":"Seasons","qualifier_ui":null,"qualifier_name":null,"is_major_topic":true},{"descriptor_ui":"D015994","descriptor_name":"Incidence","qualifier_ui":null,"qualifier_name":null,"is_major_topic":false}],"locations_count":4,"locations":[{"id":"doi:10.1136/gut.38.3.376","doi":"https://doi.org/10.1136/gut.38.3.376","is_oa":true,"landing_page_url":"https://doi.org/10.1136/gut.38.3.376","pdf_url":"https://gut.bmj.com/content/gutjnl/38/3/376.full.pdf","source":{"id":"https://openalex.org/S3251770","display_name":"Gut","issn_l":"0017-5749","issn":["0017-5749","1468-3288"],"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-200","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319945","host_organization_name":"BMJ","host_organization_lineage":["https://openalex.org/P4310319945"],"host_organization_lineage_names":["BMJ"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Gut","raw_type":"journal-article"},{"id":"pmh:oai:europepmc.org:465985","doi":null,"is_oa":true,"landing_page_url":"http://europepmc.org/pmc/articles/PMC1383065","pdf_url":null,"source":{"id":"https://openalex.org/S4306400806","display_name":"Europe PMC (PubMed Central)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1303153112","host_organization_name":"European Bioinformatics Institute","host_organization_lineage":["https://openalex.org/I1303153112"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"","raw_type":"Text"},{"id":"pmh:oai:pubmedcentral.nih.gov:1383065","doi":null,"is_oa":true,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/1383065","pdf_url":null,"source":{"id":"https://openalex.org/S2764455111","display_name":"PubMed Central","issn_l":null,"issn":null,"is_oa":true,"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":"Gut","raw_type":"Text"},{"id":"pmid:8675089","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/8675089","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":"Gut","raw_type":"Journal Article"}],"best_oa_location":{"id":"doi:10.1136/gut.38.3.376","doi":"https://doi.org/10.1136/gut.38.3.376","is_oa":true,"landing_page_url":"https://doi.org/10.1136/gut.38.3.376","pdf_url":"https://gut.bmj.com/content/gutjnl/38/3/376.full.pdf","source":{"id":"https://openalex.org/S3251770","display_name":"Gut","issn_l":"0017-5749","issn":["0017-5749","1468-3288"],"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-200","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310319945","host_organization_name":"BMJ","host_organization_lineage":["https://openalex.org/P4310319945"],"host_organization_lineage_names":["BMJ"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Gut","raw_type":"journal-article"},"sustainable_development_goals":[{"display_name":"Good health and well-being","score":0.9789000153541565,"id":"https://metadata.un.org/sdg/3"}],"study_designs":[{"display_name":"Observational Study","id":"https://openalex.org/study-designs/observational-study"}],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2016434905.pdf","grobid_xml":"https://content.openalex.org/works/W2016434905.grobid-xml"},"referenced_works_count":20,"referenced_works":["https://openalex.org/W44195768","https://openalex.org/W79987382","https://openalex.org/W1940011184","https://openalex.org/W1968877833","https://openalex.org/W1979768971","https://openalex.org/W1996650050","https://openalex.org/W2025463385","https://openalex.org/W2038783521","https://openalex.org/W2073717874","https://openalex.org/W2089551129","https://openalex.org/W2091108244","https://openalex.org/W2092045897","https://openalex.org/W2094733493","https://openalex.org/W2095773593","https://openalex.org/W2130387436","https://openalex.org/W2143291801","https://openalex.org/W2152068120","https://openalex.org/W2309943347","https://openalex.org/W2418617059","https://openalex.org/W4302771104"],"related_works":["https://openalex.org/W2050280907","https://openalex.org/W2145231881","https://openalex.org/W13346190","https://openalex.org/W142637204","https://openalex.org/W2143291801","https://openalex.org/W2396674616","https://openalex.org/W2077120409","https://openalex.org/W1981428332","https://openalex.org/W2586542825","https://openalex.org/W2052206067"],"abstract_inverted_index":{"Several":[0],"retrospective":[1],"studies":[2,15],"have":[3,16],"reported":[4],"seasonal":[5,39,135],"variations":[6,40,136],"in":[7,19,107,110,140],"the":[8,20,66,73,134],"relapse":[9],"of":[10,22,41,43,54,65,68,75,88,131,137],"ulcerative":[11,23,44],"colitis,":[12,24],"and":[13,47,72,93,112],"two":[14],"found":[17,122],"seasonality":[18,103,128],"onset":[21,42,74,109,139],"with":[25,52,91,96,126],"a":[26,62],"peak":[27],"from":[28,61],"August":[29],"to":[30,36],"January.":[31],"This":[32],"study":[33,64],"was":[34,77,101,121],"designed":[35],"investigate":[37],"possible":[38],"colitis":[45],"(UC)":[46],"Crohn's":[48],"disease":[49,138],"(CD).":[50],"Patients":[51],"symptoms":[53,76],"one":[55],"year":[56],"or":[57],"less":[58],"were":[59,98],"recruited":[60],"prospective":[63],"incidence":[67],"inflammatory":[69],"bowel":[70],"disease,":[71],"recorded":[78],"month":[79,81],"by":[80],"for":[82,114,118,133],"four":[83],"consecutive":[84],"years.":[85],"A":[86],"total":[87],"420":[89],"patients":[90,95],"UC":[92,115],"142":[94],"CD":[97],"included.":[99],"There":[100],"monthly":[102],"(p":[104],"=":[105],"0.028)":[106],"symptomatic":[108],"December":[111],"January":[113],"but":[116],"not":[117],"CD.":[119],"It":[120],"that":[123],"environmental":[124],"agents":[125],"known":[127],"can":[129],"be":[130],"importance":[132],"UC.":[141]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2024,"cited_by_count":2},{"year":2022,"cited_by_count":3},{"year":2021,"cited_by_count":2},{"year":2019,"cited_by_count":2},{"year":2018,"cited_by_count":2},{"year":2017,"cited_by_count":9},{"year":2016,"cited_by_count":3},{"year":2015,"cited_by_count":7},{"year":2014,"cited_by_count":3},{"year":2013,"cited_by_count":10},{"year":2012,"cited_by_count":5}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}