医学
肺活量
间质性肺病
队列
内科学
比例危险模型
回顾性队列研究
队列研究
生存分析
扩散能力
肺
肺功能
作者
Wanlong Wu,Wenwen Xu,Wenjia Sun,Danting Zhang,Jiangfeng Zhao,Qun Luo,Xiaodong Wang,Feng Zhu,Yu Zheng,Xue Yu,Weiguo Wan,Huaxiang Wu,Qin Han,Shuang Ye
出处
期刊:Rheumatology
[Oxford University Press]
日期:2021-03-25
卷期号:61 (1): 230-239
被引量:37
标识
DOI:10.1093/rheumatology/keab305
摘要
Anti-melanoma differentiation-associated gene 5 (MDA5) positive DM is a life-threatening disease often complicated with rapidly progressive interstitial lung disease (ILD). This study aimed to establish and validate a clinical prediction model for 6-month all-cause mortality in Chinese patients with anti-MDA5 positive DM-ILD.We conducted a retrospective observational study using a single-centre derivation cohort and a multicentre validation cohort. Hospitalized DM patients with positive anti-MDA5 antibody and ILD course ≤3 months on admission were included. Patients' baseline characteristics were described and compared between the deceased and survivors by univariable Cox regression. Optimal cut-off values were defined by the 'survminer' R package for significant continuous variables. Independent prognostic factors were determined by the final multivariable Cox regression model chosen by backward stepwise algorithm, which could be reproduced in both cohorts. The Kaplan-Meier survival analyses based on the derived predictor were conducted.A total of 184 and 81 eligible patients were included with a cumulative 40.8 and 40.7% 6-month mortality in the derivation and validation cohorts, respectively. Based on multivariable Cox regression, the prognostic factor at baseline was identified and validated as three-category forced vital capacity (FVC)%: FVC% ≥50%, FVC% <50%, unable to perform. This significantly distinguishes three risk stages with mortalities of 15.3, 46.8, 97.4% in the derivation cohort, and 14.9, 58.3, 86.4 in the validation cohort, respectively (all P <0.05).The validated FVC%-based categorical predictor in anti-MDA5 positive DM-ILD is helpful for risk stratification in clinical practice and might facilitate cohort enrichment for future trials.
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