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A nomogram was constructed to predict OS, and calibration curves and time-dependent receiver operating characteristic (ROC) curves were employed to assess OS accuracy.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Multivariate regression analyses revealed that gender, DBIL, ALT, GGT, tumor size, lesion\u2019s position, the signal intensity ratio of liver to paraspinal muscle (SIR\n                      <jats:sub>Liver\/Muscle<\/jats:sub>\n                      ), and the signal intensity ratio of spleen to paraspinal muscle (SIR\n                      <jats:sub>Spleen\/Muscle<\/jats:sub>\n                      ) on T2WI sequences were significantly associated with OS, and these variables were included in a nomogram. The concordance index of nomogram for predicting OS was 0.766, and the AUC values of the nomogram predicting 1-year and 2-year OS rates were 0.838 and 0.863, respectively. The calibration curve demonstrated good agreement between predicted and observed OS. 5-fold and 10-fold cross-validation show good stability of nomogram predictions.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Our nomogram based on clinical, laboratory, and MRI features well predicted OS of ECC patients, and could be considered as a convenient and personalized prediction tool for clinicians to make decisions.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12880-023-01188-y","type":"journal-article","created":{"date-parts":[[2024,1,2]],"date-time":"2024-01-02T10:07:14Z","timestamp":1704190034000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Survival analysis of patients with extrahepatic cholangiocarcinoma: a nomogram for clinical and MRI features"],"prefix":"10.1186","volume":"24","author":[{"given":"Yanyan","family":"Zeng","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoyong","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiaojiao","family":"Wu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Limin","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Feng","family":"Shi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jian","family":"Shu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2024,1,2]]},"reference":[{"key":"1188_CR1","doi-asserted-by":"publisher","first-page":"433","DOI":"10.1146\/annurev-pathol-030220-020455","volume":"16","author":"PM Rodrigues","year":"2021","unstructured":"Rodrigues PM, Olaizola P, Paiva NA, Olaizola I, Agirre-Lizaso A, Landa A, et al. 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