{"doi":"10.1016/j.soard.2020.05.025","title":"Long-term incidence of gallstone disease after bariatric surgery","abstract":"BACKGROUND: Gallstone disease is a known short-term complication of bariatric surgery; little is known of the long-term incidence. OBJECTIVES: The aim of this study was to investigate the association between bariatric surgery and long-term incidence of gallstone disease. SETTINGS: A total of 25 surgery departments and 480 primary healthcare centers in Sweden. METHODS: The Swedish Obese Subjects study is a prospective, controlled study comparing the effects of bariatric surgery with usual care with a follow-up of 20 years, including 4047 individuals. The current report includes all participants without previous or concomitant cholecystectomy (n = 3597). Operative techniques used in the surgery group (n = 1755) were gastric bypass (n = 236), vertical banded gastroplasty (n = 1202), and gastric banding (n = 317). The control group (n = 1842) received customary treatment for obesity. Gallstone disease was a predefined secondary endpoint in the Swedish Obese Subjects study and the primary endpoint of this report. Data were obtained by cross-checking our study database with the Swedish National Patient Register of diagnosis and procedures. RESULTS: In the surgery and control groups, respectively, there were 307 and 252 first-time events of symptomatic gallstone disease and 230 and 170 cholecystectomies (log-rank P < .001, both outcomes). Bariatric surgery was associated with an increased risk of symptomatic gallstone disease, with a more pronounced risk during the first years of follow-up (P = .002) and an increased risk for cholecystectomy but with no time-varying effect (P = .213). CONCLUSIONS: Bariatric surgery increases the risk for symptomatic gallstone disease and cholecystectomy, especially during the first years following treatment.","journal":"Surgery for Obesity and Related Diseases","year":2020,"id":93302,"datarank":2.2299854090423192,"base_score":3.7376696182833684,"endowment":3.7376696182833684,"self_citation_contribution":0.5606504427425053,"citation_network_contribution":1.6693349662998138,"self_endowment_contribution":0.5606504427425053,"citer_contribution":1.6693349662998138,"corpus_percentile":null,"corpus_rank":null,"citation_count":41,"citer_count":40,"citers_with_citation_signal":28,"citers_with_endowment":28,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.8171,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2020-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":39055,"name":"Markku Peltonen","orcid":"0000-0002-3767-4223","position":1,"is_corresponding":false},{"id":313910,"name":"Ingmar Näslund","orcid":"0000-0002-3644-3319","position":2,"is_corresponding":false},{"id":466735,"name":"Jarl Torgerson","orcid":null,"position":3,"is_corresponding":false},{"id":313912,"name":"Lena Carlsson","orcid":"0000-0003-4145-6242","position":4,"is_corresponding":false},{"id":315851,"name":"Åsa Anveden","orcid":null,"position":0,"is_corresponding":true}],"reference_count":32,"raw_metadata":{"citation_network_status":"fetched"},"created_at":"2026-07-18T22:30:54.208860Z","pmid":"32654897","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}