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The Characteristics of the Concavity of Descending Limb of Maximal Expiratory Flow-Volume Curves Generated by Spirometry.
Lung
January 2025
National Clinical Research Center for Respiratory Disease, State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China.
Purpose: This study examined the concavity (angle β, central and peripheral concavity) of the descending limb of the maximal expiratory flow-volume (MEFV) curves to reflect various ventilatory defects, including obstructive, restrictive, or mixed patterns.
Methods: We conducted a cross-sectional study collecting spirometry data from a healthcare center and a tertiary hospital between 2017 and 2022, with additional raw flow-volume curve data from primary healthcare institutions in 2023. We analyzed differences in concavity between spirometric patterns.
Assessment of lung function in partially edentulous patients using spirometry: A cross-sectional study.
J Indian Prosthodont Soc
January 2025
Department of Dental Materials, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India.
Aim: This study aimed to evaluate the effect of partially edentulous ()PED condition on lung function through spirometry tests and comparison of airflow rates between dentulous and PED subjects.
Settings And Design: The study design was a cross-sectional study conducted in the department of prosthodontics.
Materials And Methods: Twenty-eight dentulous and 28 PED patients with an age range of 25-50 years were included in the study.
Preserved Ratio Impaired Spirometry (PRISm) Prevalence, Risk Factors, and Outcomes: A Systematic Review and Meta-Analysis.
Chest
December 2024
Division of Pulmonary and Critical Care Medicine, University of Miami, Miami, FL. Electronic address:
Background: The prevalence of chronic respiratory diseases is increasing globally. There is evidence that those with spirometric impairment, and no evidence of obstruction, termed preserved ratio impaired spirometry (PRISm), have increased risk of morbidity and mortality, compared to those with normal lung function. There remain several gaps in characterizing PRISm.
View Article and Find Full Text PDFLung Function Parameters among Adult Bangladeshi Population.
Mymensingh Med J
January 2025
Dr Rajashish Chakrabortty, Associate Professor, Department of Respiratory Medicine, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh; Email:
The standard values of lung function parameters obtained from Western populations do not agree with that of the people of Bangladesh. The study aimed to establish valid and up-to-date spirometry predictive values for the general population in Bangladesh. This cross-sectional observational study was conducted over six months from February 2020 to July 2020 in the Department of Respiratory medicine of Bangabandhu Sheikh Mujib Medical University (BSMMU), Bangladesh.
View Article and Find Full Text PDFA refined spirometry dataset for comparing segmented (piecewise) linear models to that of GAMLSS.
Data Brief
December 2024
Department of Physiology and Membrane Biology, Tupper Hall, Rm 4327, 1275 Med Sciences Drive, University of California, Davis, CA 95616, United States.
Generalized Additive Models for Location, Scale, and Shape (GAMLSS) are widely used for developing spirometric reference equations but are often complex, requiring additional spline tables. This study explores the potential of Segmented (piecewise) Linear Regression as an alternative, comparing its predictive accuracy to GAMLSS and examining the agreement between the two methods. Spirometry data from nearly 16,600 patients, deemed Grade "A" and "B" acceptable from the NHANES 2007-2012 dataset, was analyzed.
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