{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T18:43:24Z","timestamp":1790275404154,"version":"4.1.0"},"reference-count":49,"publisher":"Oxford University Press (OUP)","issue":"8","license":[{"start":{"date-parts":[[2023,1,21]],"date-time":"2023-01-21T00:00:00Z","timestamp":1674259200000},"content-version":"vor","delay-in-days":1,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,7,31]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n               <jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>Inter-individual variations of non-glomerular filtration rate (GFR) determinants of serum creatinine, such as muscle mass, account for the imperfect performance of estimated GFR (eGFR) equations. We aimed to develop an equation based on creatinine and total lumbar muscle cross-sectional area measured by unenhanced computed tomography scan at the third lumbar vertebra.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>The muscle mass\u2013based eGFR (MMB-eGFR) equation was developed in 118 kidney donor candidates (iohexol clearance) using linear regression. Validation cohorts included 114 healthy subjects from another center (51Cr-EDTA clearance, validation population 1), 55 patients with chronic diseases (iohexol, validation population 2), and 60 patients with highly discordant creatinine and cystatin C\u2013based eGFR, thus presumed to have atypical non-GFR determinants of creatinine (51Cr-EDTA, validation population 3). Mean bias was the mean difference between eGFR and measured GFR, precision the standard deviation (SD) of the bias, and accuracy the percentage of eGFR values falling within 20% and 30% of measured GFR.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>In validation population 1, performance of MMB-eGFR was not different from those of CKD-EPICr2009 and CKD-EPICr2021. In validation population 2, MMB-eGFR was unbiased and displayed better precision than CKD-EPICr2009, CKD-EPICr2021 and EKFC (SD of the biases: 13.1\u00a0vs 16.5, 16.8 and 15.9\u00a0mL\/min\/1.73 m2). In validation population 3, MMB-eGFR had better precision and accuracy {accuracy within 30%: 75.0% [95% confidence interval (CI) 64.0\u201386.0] vs 51.5% (95% CI 39.0\u201364.3) for CKD-EPICr2009, 43.3% (95% CI 31.0\u201355.9) for CKD-EPICr2021, and 53.3% (95% CI 40.7\u201366.0) for EKFC}. Difference in bias between Black and white subjects was \u22122.1\u00a0mL\/min\/1.73 m2 (95% CI \u22127.2 to 3.0), vs \u22128.4\u00a0mL\/min\/1.73 m2 (95% CI \u221213.2 to \u22123.6) for CKD-EPICr2021.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>MMB-eGFR displayed better performances than equations based on demographics, and could be applied to subjects of various ethnic backgrounds.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1093\/ckj\/sfad012","type":"journal-article","created":{"date-parts":[[2023,1,19]],"date-time":"2023-01-19T13:44:19Z","timestamp":1674135859000},"page":"1265-1277","source":"Crossref","is-referenced-by-count":21,"title":["Development and validation of a new equation based on plasma creatinine and muscle mass assessed by CT scan to estimate glomerular filtration rate: a cross-sectional study"],"prefix":"10.1093","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9828-3245","authenticated-orcid":false,"given":"Thomas","family":"Stehl\u00e9","sequence":"first","affiliation":[{"name":"Univ. Paris Est Cr\u00e9teil, Institut National de la Sant\u00e9 et de la Recherche M\u00e9dicale (INSERM) U955, Institut Mondor de Recherche Biom\u00e9dicale (IMRB) , Cr\u00e9teil, France"},{"name":"Assistance Publique des H\u00f4pitaux de Paris (AP-HP), H\u00f4pitaux Universitaires Henri Mondor, Service de N\u00e9phrologie et Transplantation, F\u00e9d\u00e9ration Hospitalo-Universitaire \u00ab Innovative therapy for immune disorders \u00bb , Cr\u00e9teil, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yaniss","family":"Ouamri","sequence":"additional","affiliation":[{"name":"Univ. Paris Est Cr\u00e9teil, Institut National de la Sant\u00e9 et de la Recherche M\u00e9dicale (INSERM) U955, Institut Mondor de Recherche Biom\u00e9dicale (IMRB) , Cr\u00e9teil, France"},{"name":"Assistance Publique des H\u00f4pitaux de Paris (AP-HP), H\u00f4pitaux Universitaires Henri-Mondor, Service d'Imagerie M\u00e9dicale , Cr\u00e9teil, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3443-5024","authenticated-orcid":false,"given":"Antoine","family":"Morel","sequence":"additional","affiliation":[{"name":"Univ. Paris Est Cr\u00e9teil, Institut National de la Sant\u00e9 et de la Recherche M\u00e9dicale (INSERM) U955, Institut Mondor de Recherche Biom\u00e9dicale (IMRB) , Cr\u00e9teil, France"},{"name":"Assistance Publique des H\u00f4pitaux de Paris (AP-HP), H\u00f4pitaux Universitaires Henri-Mondor, Service de Sant\u00e9 Publique , Cr\u00e9teil, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9356-7302","authenticated-orcid":false,"given":"Emmanuelle","family":"Vidal-Petiot","sequence":"additional","affiliation":[{"name":"Universit\u00e9 Paris Cit\u00e9, Institut National de la Sant\u00e9 et de la Recherche M\u00e9dicale (INSERM) , U1149, Paris, France"},{"name":"Assistance Publique des H\u00f4pitaux de Paris (AP-HP), D\u00e9partement de Physiologie-Explorations Fonctionnelles , H\u00f4pital Bichat, Paris , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Soraya","family":"Fellahi","sequence":"additional","affiliation":[{"name":"Universit\u00e9 Pierre et Marie Curie Paris 6, H\u00f4pital Piti\u00e9-Salp\u00eatri\u00e8re, Assistance Publique des H\u00f4pitaux de Paris (APHP) , Paris , France"},{"name":"Assistance Publique des H\u00f4pitaux de Paris (AP-HP), H\u00f4pitaux Universitaires Henri Mondor, D\u00e9partement de Biochimie , Cr\u00e9teil, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lauriane","family":"Segaux","sequence":"additional","affiliation":[{"name":"Univ. Paris Est Cr\u00e9teil, Institut National de la Sant\u00e9 et de la Recherche M\u00e9dicale (INSERM) U955, Institut Mondor de Recherche Biom\u00e9dicale (IMRB) , Cr\u00e9teil, France"},{"name":"Assistance Publique des H\u00f4pitaux de Paris (AP-HP), H\u00f4pitaux Universitaires Henri-Mondor, Service de Sant\u00e9 Publique , Cr\u00e9teil, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dominique","family":"Pri\u00e9","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Paris Cit\u00e9, Facult\u00e9 de M\u00e9decine, Institut National de la Sant\u00e9 et de la Recherche M\u00e9dicale (INSERM) U1151 , Paris , France"},{"name":"Assistance Publique des H\u00f4pitaux de Paris (AP-HP), Groupe Hospitalier Necker Enfants Malades , Service de Physiologie et Explorations Fonctionnelles, Paris , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philippe","family":"Grimbert","sequence":"additional","affiliation":[{"name":"Univ. Paris Est Cr\u00e9teil, Institut National de la Sant\u00e9 et de la Recherche M\u00e9dicale (INSERM) U955, Institut Mondor de Recherche Biom\u00e9dicale (IMRB) , Cr\u00e9teil, France"},{"name":"Assistance Publique des H\u00f4pitaux de Paris (AP-HP), H\u00f4pitaux Universitaires Henri Mondor, Service de N\u00e9phrologie et Transplantation, F\u00e9d\u00e9ration Hospitalo-Universitaire \u00ab Innovative therapy for immune disorders \u00bb , Cr\u00e9teil, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alain","family":"Luciani","sequence":"additional","affiliation":[{"name":"Univ. Paris Est Cr\u00e9teil, Institut National de la Sant\u00e9 et de la Recherche M\u00e9dicale (INSERM) U955, Institut Mondor de Recherche Biom\u00e9dicale (IMRB) , Cr\u00e9teil, France"},{"name":"Assistance Publique des H\u00f4pitaux de Paris (AP-HP), H\u00f4pitaux Universitaires Henri-Mondor, Service d'Imagerie M\u00e9dicale , Cr\u00e9teil, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vincent","family":"Audard","sequence":"additional","affiliation":[{"name":"Univ. 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Paris Diderot, Sorbonne Paris Cit\u00e9, Institut National de la Sant\u00e9 et de la Recherche M\u00e9dicale (INSERM) , U1155"},{"name":"Assistance Publique des H\u00f4pitaux de Paris (AP-HP), H\u00f4pitaux de Paris, h\u00f4pital Tenon, D\u00e9partement de Physiologie-Explorations Fonctionnelles , Paris , France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S\u00e9bastien","family":"Mul\u00e9","sequence":"additional","affiliation":[{"name":"Univ. 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