{
    "abstract": "As exacerbations of chronic obstructive pulmonary disease (COPD) are one of the leading causes of hospitalization and are associated with significant mortality, it is particularly important to accurately assess the risk of exacerbations in COPD. Most of the current clinical biomarkers are related to inflammation and few consider how ion levels affect COPD. Chloride ion, the second most abundant serum electrolyte, has been shown to be associated with poor prognoses in several diseases, but their relationship with COPD remains unclear.\nIn total, 105 patients with acute exacerbations of COPD were recruited. Data on clinical characteristics, lung function, blood count, blood biochemistry, relevant scales including the Clinical COPD Questionnaire (CCQ), BODE (BMI, airflow obstruction, dyspnea, exercise capacity) index and the St. George's Respiratory Questionnaire (SGRQ) were collected from all patients for statistical analysis.\nThere were significant differences in lung function indicators and disease severity in the low chloride ion subgroup compared with the high chloride ion subgroup. On multiple logistic regression analysis, chloride ion was an independent factor affecting lung function in COPD patients (OR=0.808, 95% CI: 0.708 - 0.922, p=0.002). The sensitivity of chloride ion in predicting COPD severity was 78%, the specificity was 63%, and the area under the curve was 0.734 (p<0.001). Subgroup analysis showed that chloride ion was a stronger predictor in male and smoking patients.\nChloride ion was a novel prognostic biomarker for COPD, and low levels of chloride ion were independently associated with exacerbations in COPD patients.",
    "authors": [
        {
            "affiliation": "Department of Respiratory and Critical Medicine, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.",
            "firstname": "Yiben",
            "initials": "Y",
            "lastname": "Huang"
        },
        {
            "affiliation": "The First School of Medicine, School of Information and Engineering, Wenzhou Medical University, Wenzhou, China.",
            "firstname": "Binbin",
            "initials": "B",
            "lastname": "Hu"
        },
        {
            "affiliation": "The First School of Medicine, School of Information and Engineering, Wenzhou Medical University, Wenzhou, China.",
            "firstname": "Siyao",
            "initials": "S",
            "lastname": "Chen"
        },
        {
            "affiliation": "The First School of Medicine, School of Information and Engineering, Wenzhou Medical University, Wenzhou, China.",
            "firstname": "Zerui",
            "initials": "Z",
            "lastname": "Jiang"
        },
        {
            "affiliation": "The First School of Medicine, School of Information and Engineering, Wenzhou Medical University, Wenzhou, China.",
            "firstname": "Zicong",
            "initials": "Z",
            "lastname": "Dai"
        },
        {
            "affiliation": "The Second School of Medicine, Wenzhou Medical University, Wenzhou, Zhejiang, China.",
            "firstname": "Zihan",
            "initials": "Z",
            "lastname": "Jiang"
        },
        {
            "affiliation": "Department of Respiratory and Critical Medicine, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.",
            "firstname": "Chunyan",
            "initials": "C",
            "lastname": "Liu"
        },
        {
            "affiliation": "Department of Respiratory and Critical Medicine, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.",
            "firstname": "Yage",
            "initials": "Y",
            "lastname": "Xu"
        },
        {
            "affiliation": "Department of Respiratory and Critical Medicine, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.",
            "firstname": "Xianjing",
            "initials": "X",
            "lastname": "Chen"
        },
        {
            "affiliation": "Department of Respiratory and Critical Medicine, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.",
            "firstname": "Wanzhong",
            "initials": "W",
            "lastname": "Jin"
        },
        {
            "affiliation": "Department of Respiratory and Critical Medicine, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.",
            "firstname": "Beibei",
            "initials": "B",
            "lastname": "Yu"
        },
        {
            "affiliation": "Department of Respiratory and Critical Medicine, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China. Electronic address: xiaodiao_zhang@126.com.",
            "firstname": "Xiaodiao",
            "initials": "X",
            "lastname": "Zhang"
        }
    ],
    "conclusions": null,
    "copyrights": "Copyright \u00a9 2024 Southern Society for Clinical Investigation. Published by Elsevier Inc. All rights reserved.",
    "doi": "10.1016/j.amjms.2024.05.006",
    "journal": "The American journal of the medical sciences",
    "keywords": [
        "Aecopd",
        "BODE",
        "Chloride ion",
        "Electrolyte",
        "GOLD"
    ],
    "methods": null,
    "publication_date": "2024-05-23",
    "pubmed_id": "38777153",
    "results": null,
    "title": "The role of serum chloride ion in the prognosis of COPD.",
    "xml": "<Element 'PubmedArticle' at 0x78850539e1b0>"
}