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We conducted a cohort study involving a pre\u2010specified medical check\u2010up in a cooperation between a BS department and an outpatient medical centre. A total of 1068 patients (74.4% women) were enrolled in the study. The mean age was 42.1\u2009years (standard deviation [SD] 11.9) and the mean body mass index (BMI) was 46.1 (SD 6.91). The onset of obesity occurred in 11.4% of patients during childhood, 47.2% during schooltime\/adolescence, 41.4% in adulthood. Gender differences were observed: men had higher BMI, systolic blood pressure, and impaired metabolic state (including diabetes, dyslipidemia, and liver disease with <jats:italic>p<\/jats:italic>\u2010values &lt;.001 for all). Women had lower haemoglobin levels, impaired iron status, lower albumin levels (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.001), and increased C\u2010reactive protein levels (<jats:italic>p<\/jats:italic>\u2009&lt;\u2009.05). The prevalence of UUC conditions (percentage of cases) was as follows: arterial hypertension, 53%; decreased cystatin C clearance, 57%; dyslipidemia, 41%; fatty liver, 40%; iron deficiency, 37%; diabetes mellitus, 34%; vitamin D deficiency, 32%; chronic pain syndrome, 23%; liver fibrosis, 12%; obstructive sleep apnea, 10%; and vitamin deficiencies (vitamin B<jats:sub>12<\/jats:sub>, folic acid, vitamin K<jats:sub>1<\/jats:sub>) &lt;10%. Undiagnosed hypertension was more prevalent in younger women, and nutritional deficits were associated with high BMI in both genders. Older age and high BMI were associated with undiagnosed diabetes and decreased glomerular filtration rate in both genders, and with liver fibrosis in men. UUC are highly prevalent in individuals undergoing BS. A refined assessment is recommended to improve health conditions and outcome in these candidates.<\/jats:p>","DOI":"10.1111\/cob.12695","type":"journal-article","created":{"date-parts":[[2024,7,26]],"date-time":"2024-07-26T04:33:45Z","timestamp":1721968425000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Undetected and undiagnosed comorbidity in patients with obesity undergoing bariatric surgery\u2014<scp>Results<\/scp> from the <scp>Berlin Bariatric Cohort<\/scp> study"],"prefix":"10.1111","volume":"14","author":[{"given":"Wolfgang","family":"Pommer","sequence":"first","affiliation":[{"name":"Medizinisches Versorgungszentrum (MVZ), Windscheidstrasse  Berlin Germany"},{"name":"Charit\u00e9 Universit\u00e4tsmedizin  Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hendrik","family":"Krautschneider","sequence":"additional","affiliation":[{"name":"Charit\u00e9 Universit\u00e4tsmedizin  Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Susanne D.","family":"Kuhlmann","sequence":"additional","affiliation":[{"name":"Medizinisches Versorgungszentrum (MVZ), Windscheidstrasse  Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gerold","family":"Koplin","sequence":"additional","affiliation":[{"name":"Klinik f\u00fcr Minimal\u2010Invasive Chirurgie (MIC)  Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin","family":"Susewind","sequence":"additional","affiliation":[{"name":"Klinik f\u00fcr Minimal\u2010Invasive Chirurgie (MIC)  Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Oleg","family":"Tsuprykov","sequence":"additional","affiliation":[{"name":"IFLB \u2013 Institute for Laboratory Medicine Berlin  Berlin Germany"},{"name":"Faculty of Medicine, Institute of Mind, Brain and Behavior, HMU Health and Medical University  Potsdam Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,7,25]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa1700459"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.21037\/atm.2017.03.54"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1210\/clinem\/dgad330"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11695\u2010014\u20101537\u2010y"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1038\/sj.ijo.0802752"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa2002449"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12875\u2010022\u201001811\u2010x"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1007\/s13300\u2010023\u201001455\u20109"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/alr.23079"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1053\/j.ajkd.2023.08.021"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11695\u2010019\u201004204\u20109"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1007\/s13300\u2010023\u201001449\u20107"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1093\/ckj\/sfab042"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.3238\/arztebl.m2021.0359"},{"key":"e_1_2_7_16_1","doi-asserted-by":"publisher","DOI":"10.1001\/jama.2017.21055"},{"key":"e_1_2_7_17_1","doi-asserted-by":"publisher","DOI":"10.1093\/sleep\/14.6.540"},{"key":"e_1_2_7_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/S2214\u2010109X(22)00482\u2010X"},{"key":"e_1_2_7_19_1","doi-asserted-by":"publisher","DOI":"10.1038\/oby.2008.653"},{"key":"e_1_2_7_20_1","doi-asserted-by":"publisher","DOI":"10.3390\/ijms241814019"},{"key":"e_1_2_7_21_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.surge.2023.07.002"},{"key":"e_1_2_7_22_1","doi-asserted-by":"publisher","DOI":"10.3345\/cep.2023.00892"},{"key":"e_1_2_7_23_1","doi-asserted-by":"publisher","DOI":"10.1159\/000490247"},{"key":"e_1_2_7_24_1","doi-asserted-by":"publisher","DOI":"10.1097\/MCO.0000000000000352"},{"key":"e_1_2_7_25_1","doi-asserted-by":"publisher","DOI":"10.1111\/obr.13606"},{"key":"e_1_2_7_26_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11695\u2010023\u201006913\u20108"},{"key":"e_1_2_7_27_1","doi-asserted-by":"publisher","DOI":"10.1093\/ajh\/hpv067"},{"key":"e_1_2_7_28_1","unstructured":"SchienkiewitzA KuhnertR BlumeM MensinkGBM.\u00dcbergewicht und Adipositas bei Erwachsenen in Deutschland \u2013 Ergebnisse der Studie. 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