The purpose of the study is to evaluate the significance of KL-6 as a biomarker in the clinical diagnosis of interstitial lung disease (ILD) by detecting serum KL-6 levels among patients with ILD, and comparing them to the clinical diagnostic criteria and other respiratory diseases. In addition, the study discusses the value of KL-6 levels in terms of ILD treatment effect evaluation through the detection of serum KL-6 levels before treatment and after treatment.
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The KL-6 concentration on the immune analyzer
Timeframe: The serum from patients with ILD will be collected for the duration of hospital stay, an average of 4 weeks