Serum lactate dehydrogenase is associated with impaired lung function: NHANES 2011-2012

• Published in: PloS one 2023-02, Vol.18 (2), p.e0281203-e0281203
• Main Authors: Hu, Sheng, Ye, Jiayue, Guo, Qiang, Zou, Sheng, Zhang, Wenxiong, Zhang, Deyuan, Zhang, Yang, Wang, Silin, Su, Lang, Wei, Yiping
• Format: Article
• Language: English
• Subjects: Abdomen; Abdominal surgery; Biology and Life Sciences; Blood pressure; Cholesterol; Chronic obstructive pulmonary disease; Clinical medicine; Contraindications; Creatinine; Curve fitting; Data collection; Dehydrogenase; Dehydrogenases; Enzymes; Forced Expiratory Volume; Gender; Glucose; Health aspects; Humans; Indicators; L-Lactate dehydrogenase; Lactate dehydrogenase; Lactate Dehydrogenases - blood; Lactic acid; Lung - physiopathology; Lung diseases; Medicine and Health Sciences; Multiple regression analysis; Nutrition; Nutrition Surveys; Otolaryngology; Physical Sciences; Population studies; Pulmonary functions; Regression analysis; Research and Analysis Methods; Respiratory diseases; Respiratory function; Risk factors; Serology; Statistical analysis; Statistics; Thoracic surgery; Variables; Vital Capacity
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0281203

Serum lactate dehydrogenase levels reflect disease status in a variety of organs, but its role in indicating pulmonary function is not yet clear. Therefore, this study explored the correlation between pulmonary function and serum lactate dehydrogenase, and investigated thresholds for changes in pulmonary function indicators in the total population as well as in different strata of the population. Based on data from the National Health and Nutrition Examination Survey (NHANES) 2011-2012 (n = 3453), univariate and stratified analyses were performed to investigate factors associated with pulmonary function, and multiple regression analysis was used to further investigate the specific relationship with serum lactate dehydrogenase. Smoothed curve fitting, threshold effect and saturation effect analysis were used to explore the threshold level of serum lactate dehydrogenase at the onset of changes in pulmonary function indicators. Adjusted smoothed curve fit plots showed a linear relationship between serum lactate dehydrogenase levels and forced vital capacity and forced expiratory volume in one second: for each 1 U/L increase in serum lactate dehydrogenase levels, forced vital capacity decreased by 1.24 mL (95% CI = -2.05, -0.42, P = 0.0030) and forced expiratory volume in one second by 1.11 mL (95% CI = -1.82, -0.39, P = 0.0025). Serum lactate dehydrogenase was negatively and linearly correlated with pulmonary function indices in the total population analyzed. Based on the total population and different population stratifications, this study determined the threshold values of serum lactate dehydrogenase at the onset of decline of pulmonary function in different populations. This provides a new serological monitoring indicator for patients suffering from respiratory diseases and has implications for patients with possible clinical impairment of pulmonary function. However, our cross-sectional study was not able to determine a causal relationship between these two factors, and further research is needed.