OOIR: Observatory of International Research

Papers

(The TQCC of Chronic Obstructive Pulmonary Diseases-Journal of the Copd Foundation is 2. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-11-01 to 2025-11-01.)

Article	Citations
Impact of Coronavirus Disease 2019 and Vaccination Attitudes on Alpha-1 Antitrypsin Deficiency	13
The Experiences of Individuals With a History of Acute Exacerbations of COPD and Their Thoughts on Death: Empirical Qualitative Research	11
Bronchodilator Response in COPD: Definitions, Reference Equations, and Race	11
Genetic Evidence for Causal Relationships Between Circulating Cathepsin Levels and Chronic Obstructive Pulmonary Disease: A Mendelian Randomization Study	8
Integrating Artificial Intelligence in the Diagnosis of COPD Globally: A Way Forward	7
Current-Smoking-Related COPD or COPD With Acute Exacerbation is Associated With Poorer Survival Following Oral Cavity Squamous Cell Carcinoma Surgery	6
Machine Learning Prediction of Progression in Forced Expiratory Volume in 1 Second in the COPDGene® Study	6
Comparison of Chart Review and Administrative Data in Developing Predictive Models for Readmissions in Chronic Obstructive Pulmonary Disease	6
Tiotropium in Patients With Airflow Limitation According to the Fixed Ratio But Not the Lower Limit of Normal: A Secondary Analysis of the Tiotropium in Early-COPD Study	6
Augmentation Therapy for Alpha-1 Antitrypsin Deficiency: Patient Experiences With Self-Infusion, Home Providers, and Clinics	5
Fall Risk and Medication Use Near End of Life Among Adults With Chronic Obstructive Pulmonary Disease	5
Childhood Cigarette Smoking and Risk of COPD in Older U.S. Adults: A Nationally Representative Replication Study	4
Fractional Exhaled Nitric Oxide in Eosinophilic COPD	4
Beyond Access: Factors Associated With Spirometry Underutilization Among Patients With a Diagnosis of COPD in Urban Tertiary Care Centers	4
Association of Mucus Plugging and Body Mass Index in Patients With Advanced COPD GOLD 3/4 With Emphysema	4
Impact of Body Mass Index on the Risk of Exacerbation in Patients With COPD: A Systematic Review and Meta-Analysis	4
Polypharmacy in Patients With COPD: A Scoping Review	4
The Neutrophil-to-Lymphocyte Ratio as a Predictor of Acute Exacerbations Among Patients With COPD in Uganda	4
Clinical Characteristics of Patients With COPD and Comorbid Depression and Anxiety: Data From a National Multicenter Cohort Study	3
Interleukin-17A Promotes Airway Remodeling in Chronic Obstructive Pulmonary Disease by Activating C-X-C Motif Chemokine Ligand 12 Secreted by Lung Fibroblasts	3
Elastin Degradation and Lung Function Deterioration with Remote Secondhand Tobacco Smoke Exposure in Never-smokers	3
Development of a Communication Instrument to Address Sexuality in COPD: COSY	3
Insights About the Human-Centered Design Analysis as a Tool to Improving Patients’ Tolerance with Non-Invasive Ventilation	3
Home Telemonitoring Program in Individuals With COPD During the Coronavirus Disease 2019 Pandemic: A Pilot Study	3
Home-based Pulmonary Rehabilitation is Effective in Frail COPD Patients with Chronic Respiratory Failure	3

Outcomes of Virtual Pulmonary Rehabilitation in Oxygen-Dependent COPD Patients	3
Urine and Plasma Markers of Platelet Activation and Respiratory Symptoms in COPD	3
Improving Research for COPD in Rural Areas: A Statement from the COPD Foundation Medical and Scientific Advisory Committee	3
Design of the SPIROMICS Study of Early COPD Progression: SOURCE Study	3
Antibody Response to Severe Acute Respiratory Syndrome Coronavirus-2 Vaccination in COPD: A Cohort Study	3
Journal Club-Respiratory Impairment With A Preserved Spirometric Ratio	3
Evaluation of COPD Chronic Care Management Collaborative to Reduce Emergency Department and Hospital Revisits Across U.S. Hospitals	3
Impact of Bronchiectasis on COPD Severity and Alpha-1 Antitrypsin Deficiency as a Risk Factor in Individuals with a Heavy Smoking History	3
Lung Structure and Risk of Sleep Apnea in SPIROMICS	3
Circulating Exosomes and Ambient Air Pollution Exposure in COPD	3
Body Mass Index and Bronchodilator Responsiveness in Adults: Analysis of 2 Population-Based Studies in 4 South American Countries	3
The Current Landscape of COPD-Related Clinical Trials Registered on the World Health Organization’s International Clinical Trials Registry Platform: A Comprehensive Analysis of Study Characteristics a	3
Factors Associated with Attrition in a Longitudinal Cohort of Older Adults in the Community	3
Mortality Risk and Serious Cardiopulmonary Events in Moderate-to-Severe COPD: Post Hoc Analysis of the IMPACT Trial	3
Sex-Associated Radiographic and Clinical Differences in Nontuberculous Mycobacteria Pulmonary Disease	2
Impact of Bronchiectasis on COPD Severity and Alpha-1 Antitrypsin Deficiency as a Risk Factor in Individuals with a Heavy Smoking History	2
Short-Term Impact of the Frequency of COPD Exacerbations on Quality of Life	2
Designing Clinical Trials in “Regular” COPD Versus Alpha-1 Antitrypsin Deficiency-Associated COPD: “More Alike Than Unalike?”	2
Blood Eosinophil Count Stability and Clinical Outcomes in Patients With Chronic Obstructive Pulmonary Disease in a High Endemic Area of Parasitic Infection: A Prospective Study	2
Impact of Pharmacist Inhaler Prescribing at Discharge for Chronic Obstructive Pulmonary Disease on Readmission Rates	2
The Chronic Airways Assessment Test (CAAT™): Evolution From the COPD Assessment Test (CAT™)	2
Post Hoc Analysis of Lung Function Improvement and Patient-Reported Outcomes With Revefenacin in Adults With Moderate-to-Very Severe COPD and Comorbid Anxiety or Depression	2
Physical Activity and Symptom Burden in COPD: The Canadian Obstructive Lung Disease Study	2
Respiratory Microbiome Profiles Associated With Distinct Inflammatory Phenotype and Clinical Indexes in Chronic Obstructive Pulmonary Disease	2
COPD: Iron Deficiency and Clinical Characteristics in Patients With and Without Chronic Respiratory Failure	2
The Long-Term Impact of Frailty After an Intensive Care Unit Admission Due to Chronic Obstructive Pulmonary Disease	2
COPD and Schizophrenia	2
Treatable Traits in Misdiagnosed Chronic Obstructive Pulmonary Disease: Data from the Akershus Cardiac Examination 1950 Study	2
Impact of Marijuana Smoking on COPD Progression in a Cohort of Middle-Aged and Older Persons	2
Variation in Prevalence and Burden of Chronic Obstructive Pulmonary Disease by State and Insurance Type in the United States	2
Safety and Reactogenicity of COVID-19 Vaccination in Severe Alpha-1 Antitrypsin Deficiency	2
RESP-FIT: A Technology-Enhanced Combined Inspiratory and Expiratory Muscle Strength Training Intervention for Adults With COPD	2
Higher COPD Assessment Test Score Associated With Greater Exacerbations Risk: A Post Hoc Analysis of the IMPACT Trial	2
COPD With Lung Cancer Among Older United States Adults: Prevalence, Diagnostic Timeliness, and Association With Earlier Stage Tumors	2
Improving Referral Patterns for Bronchoscopic Lung Volume Reduction: A Quality Improvement Initiative	2
Novel SERPINA1 Alleles Identified through a Large Alpha-1 Antitrypsin Deficiency Screening Program and Review of Known Variants	2
A Conceptual Framework for Use of Increased Endurance Time During Constant Work Rate Cycle Ergometry as a Patient-Focused Meaningful Outcome in COPD Clinical Trials	2
Chymotrypsin-like Elastase-1 Mediates Progressive Emphysema in Alpha-1 Antitrypsin Deficiency	2
Clinical Use of an Exposure, Symptom, and Spirometry Algorithm to Stratify Smokers into COPD Risk Phenotypes: A Case-Finding Study Combined with Smoking Cessation Counseling	2
Iron Deficiency and All-Cause Hospitalization Risk in a Clinical Cohort of COPD	2
Validation of the Onset of Effect Questionnaire in Participants With Chronic Obstructive Pulmonary Disease	2