{
    "abstract": "Peritoneal recurrence is a significant cause of treatment failure after radical gastrectomy for gastric cancer. The prediction of metachronous peritoneal recurrence would have a significantly impact risk stratification and tailored treatment planning. This study aimed to externally validate the previously established PERI-Gastric 1 and 2 models to assess their generalizability in an independent population.\nRetrospective external validation was conducted on a cohort of 8564 patients who underwent elective gastrectomy for stage Ib-IIIc gastric cancer between 1998 and 2018\u00a0at the Yonsei Cancer Center. Discrimination was tested using the area under the receiver operating characteristic curves (AUROC). Accuracy was tested by plotting observations against the predicted risk of peritoneal recurrence and analyzing the resulting calibration plots. Clinical usefulness was tested with a decision curve analysis.\nIn the validation cohort, PERI-Gastric 1 and PERI-Gastric 2 exhibited an AUROC of 0.766 (95\u00a0% C.I. 0.752-0.778) and 0.767 (95\u00a0% C.I. 0.755-0.780), a calibration-in-the-large of 0.935 and 0.700, a calibration belt with a 95\u00a0% C.I. over the bisector in the risk range of 24%-33\u00a0% and 35%-47\u00a0%. The decision curve analysis revealed a positive net benefit in the risk range of 10%-42\u00a0% and 15%-45\u00a0%, respectively.\nThis study presents the external validation of the PERI-Gastric 1 and 2 scores in an Eastern population. The models demonstrated fair discrimination and satisfactory calibration for predicting the risk of peritoneal recurrence after radical gastrectomy, even in Eastern patients. PERI-Gastric 1 and 2 scores could also be applied to predict the risk of metachronous peritoneal recurrence in Eastern populations.",
    "authors": [
        {
            "affiliation": "Universit\u00e0 Cattolica del Sacro Cuore, Rome, Italy.",
            "firstname": "Francesco",
            "initials": "F",
            "lastname": "Belia"
        },
        {
            "affiliation": "Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea; Gastric Cancer Center, Yonsei Cancer Center, Yonsei University Health System, Seoul, Republic of Korea.",
            "firstname": "Ki-Yoon",
            "initials": "KY",
            "lastname": "Kim"
        },
        {
            "affiliation": "Universit\u00e0 Cattolica del Sacro Cuore, Rome, Italy; Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli n. 8, 00168, Rome, Italy.",
            "firstname": "Annamaria",
            "initials": "A",
            "lastname": "Agnes"
        },
        {
            "affiliation": "Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea; Gastric Cancer Center, Yonsei Cancer Center, Yonsei University Health System, Seoul, Republic of Korea.",
            "firstname": "Sung Hyun",
            "initials": "SH",
            "lastname": "Park"
        },
        {
            "affiliation": "Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea; Gastric Cancer Center, Yonsei Cancer Center, Yonsei University Health System, Seoul, Republic of Korea.",
            "firstname": "Minah",
            "initials": "M",
            "lastname": "Cho"
        },
        {
            "affiliation": "Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea; Gastric Cancer Center, Yonsei Cancer Center, Yonsei University Health System, Seoul, Republic of Korea.",
            "firstname": "Yoo Min",
            "initials": "YM",
            "lastname": "Kim"
        },
        {
            "affiliation": "Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea; Gastric Cancer Center, Yonsei Cancer Center, Yonsei University Health System, Seoul, Republic of Korea.",
            "firstname": "Hyoung-Il",
            "initials": "HI",
            "lastname": "Kim"
        },
        {
            "affiliation": "Universit\u00e0 Cattolica del Sacro Cuore, Rome, Italy; Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli n. 8, 00168, Rome, Italy.",
            "firstname": "Roberto",
            "initials": "R",
            "lastname": "Persiani"
        },
        {
            "affiliation": "Universit\u00e0 Cattolica del Sacro Cuore, Rome, Italy; Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli n. 8, 00168, Rome, Italy.",
            "firstname": "Domenico",
            "initials": "D",
            "lastname": "D'Ugo"
        },
        {
            "affiliation": "Universit\u00e0 Cattolica del Sacro Cuore, Rome, Italy; Dipartimento di Scienze Mediche e Chirurgiche, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Largo A. Gemelli n. 8, 00168, Rome, Italy. Electronic address: biondi.alberto@gmail.com.",
            "firstname": "Alberto",
            "initials": "A",
            "lastname": "Biondi"
        },
        {
            "affiliation": "Department of Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea; Gastric Cancer Center, Yonsei Cancer Center, Yonsei University Health System, Seoul, Republic of Korea. Electronic address: wjhyung@yuhs.ac.",
            "firstname": "Woo Jin",
            "initials": "WJ",
            "lastname": "Hyung"
        }
    ],
    "conclusions": null,
    "copyrights": "\u00a9 2024 Elsevier Ltd, BASO \u223c The Association for Cancer Surgery, and the European Society of Surgical Oncology. All rights reserved.",
    "doi": "10.1016/j.ejso.2024.108359",
    "journal": "European journal of surgical oncology : the journal of the European Society of Surgical Oncology and the British Association of Surgical Oncology",
    "keywords": [
        "Gastric cancer",
        "Peritoneal carcinomatosis",
        "Prediction models"
    ],
    "methods": null,
    "publication_date": "2024-04-25",
    "pubmed_id": "38657377",
    "results": "In the validation cohort, PERI-Gastric 1 and PERI-Gastric 2 exhibited an AUROC of 0.766 (95\u00a0% C.I. 0.752-0.778) and 0.767 (95\u00a0% C.I. 0.755-0.780), a calibration-in-the-large of 0.935 and 0.700, a calibration belt with a 95\u00a0% C.I. over the bisector in the risk range of 24%-33\u00a0% and 35%-47\u00a0%. The decision curve analysis revealed a positive net benefit in the risk range of 10%-42\u00a0% and 15%-45\u00a0%, respectively.",
    "title": "Predicting peritoneal recurrence after radical gastrectomy for gastric cancer: Validation of a prediction model (PERI-Gastric 1 and PERI-Gastric 2) on a Korean database.",
    "xml": "<Element 'PubmedArticle' at 0x788506479c60>"
}