PubMed Central (PMC) Search Page
Table representation of search results timeline featuring number of search results per year.
| Year | Number of Results |
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| 2006 | 54 |
| 2007 | 76 |
| 2008 | 83 |
| 2009 | 43 |
| 2010 | 51 |
| 2011 | 72 |
| 2012 | 85 |
| 2013 | 81 |
| 2014 | 134 |
| 2015 | 274 |
| 2016 | 351 |
| 2017 | 365 |
| 2018 | 396 |
| 2019 | 282 |
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| 2026 | 342 |
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These filters represent the three primary types of content included in the PMC archive: 1) content published in a scholarly journal 2) peer-reviewed author manuscripts accepted for publication in a journal and 3) preprint versions of articles collected through the NIH Preprint Pilot, made public prior to peer review
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The PMC Open Access Subset includes journal articles and preprints that are made available under license terms that allow reuse. Historical back issues refers to digitized content from print journals made available in PMC through the Biomedical Journal Digitization Projects.
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"Int J Chron Obstruct Pulmon Dis"[Journal]
The embargo is the time during which the publisher retains exclusive rights to distribute articles. Those articles are made freely available on the PMC website after the embargo period has ended. Citations for articles under an embargo period will still display in the PMC results list by default. Choose “Exclude” to prevent embargoed articles from displaying in your results.
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Three Systemic Comorbidity Axes in Chronic Obstructive Pulmonary Disease: A Comparative Bibliometric Analysis Based on the Web of Science Core Collection, 2005-2026.
- Zhong L, Zhong Z, Ma W, Sun Z, Xiao G, Yu Y, Cao C.
- Int J Chron Obstruct Pulmon Dis. 2026 Oct 19;21:633286. doi: 10.2147/COPD.S633286.
- PMCID: PMC13693803
Zhong L, et al.Int J Chron Obstruct Pulmon Dis. 2026.PMCID: PMC13693803 -
Dynamic Gut-Lung Microbiome Interactions Beyond Dysbiosis Across the Course of COPD.
- Ren Y, Hu Y, Qin H, Zhang Y, Zhao H.
- Int J Chron Obstruct Pulmon Dis. 2026 Oct 19;21:649518. doi: 10.2147/COPD.S649518.
- PMCID: PMC13693798
Ren Y, et al.Int J Chron Obstruct Pulmon Dis. 2026.PMCID: PMC13693798 -
Transitions Among Four Spirometric States and Subsequent Pre-Bronchodilator Airflow Obstruction: A Community Cohort Study.
- He D, Wu J, Ke J, Yang L, Zhang R, Li W.
- Int J Chron Obstruct Pulmon Dis. 2026 Oct 19;21:655213. doi: 10.2147/COPD.S655213.
- PMCID: PMC13693795
He D, et al.Int J Chron Obstruct Pulmon Dis. 2026.PMCID: PMC13693795 -
Development and Validation of a Machine Learning-Based Model for Elevated Depressive Symptom Risk in COPD Patients: A Multi-Cohort Cross-Sectional Study.
- Cheng Z, Wu J, Yan X.
- Int J Chron Obstruct Pulmon Dis. 2026 Oct 19;21:630319. doi: 10.2147/COPD.S630319.
- PMCID: PMC13693550
Cheng Z, et al.Int J Chron Obstruct Pulmon Dis. 2026.PMCID: PMC13693550 -
Acute Effects of Inspiratory Muscle Training with Different Loads on Peripheral Muscle Oxygenation Kinetics and Autonomic Response in Patients with COPD: A Protocol for a Randomized Crossover Study.
- Borges NMDS, Nogueira PAMS, de Lima DT, Freitas AL, Carneiro HMLO, Gama TO, Pereira DAG, Lima Snr JHM, Pedrosa R, de França EET.
- Int J Chron Obstruct Pulmon Dis. 2026 Oct 16;21:557387. doi: 10.2147/COPD.S557387.
- PMCID: PMC13682315
Borges NMDS, et al.Int J Chron Obstruct Pulmon Dis. 2026.PMCID: PMC13682315 -
Clinical Outcomes of High-Flow Nasal Cannula Combined with Standardized Acupoint Application in Acute Exacerbations of COPD: A Retrospective Study.
- Li B, Lu Y, Pan L, Xu X, Zhu W, Zhang D, Zhang S, Zhang B.
- Int J Chron Obstruct Pulmon Dis. 2026 Oct 16;21:632735. doi: 10.2147/COPD.S632735.
- PMCID: PMC13682294
Li B, et al.Int J Chron Obstruct Pulmon Dis. 2026.PMCID: PMC13682294 -
Erdosteine, but Not N-Acetylcysteine, is Associated with Improved Homogeneity of Alveolar Ventilation in Patients with Mild-to-Moderate COPD Treated with LABA/LAMA.
- Dal Negro RW, Turco P, Porta C, Povero M, Page CP.
- Int J Chron Obstruct Pulmon Dis. 2026 Oct 16;21:637319. doi: 10.2147/COPD.S637319.
- PMCID: PMC13682325
Dal Negro RW, et al.Int J Chron Obstruct Pulmon Dis. 2026.PMCID: PMC13682325 -
Prevalence and Associated Factors of COPD Awareness and Screening Intention among Community-Dwelling Older Adults in China.
- Du Y, Abuduwayiti R, Sun F, Lin H, Chang C, Sun S, Cao W.
- Int J Chron Obstruct Pulmon Dis. 2026 Oct 16;21:601417. doi: 10.2147/COPD.S601417.
- PMCID: PMC13682308
Du Y, et al.Int J Chron Obstruct Pulmon Dis. 2026.PMCID: PMC13682308 -
Why Sleep Matters in COPD: Cluster-Derived Sleep Phenotypes Reveal Distinct Physiological, Comorbidity and Survival Profiles.
- Hansson D, Lisik D, Andersson A, Zou D, Hedner J, Vanfleteren LEGW, Grote L.
- Int J Chron Obstruct Pulmon Dis. 2026 Oct 16;21:608140. doi: 10.2147/COPD.S608140.
- PMCID: PMC13682330
Hansson D, et al.Int J Chron Obstruct Pulmon Dis. 2026.PMCID: PMC13682330 -
The Association of COPD Patients' and Caregivers' KAP with Inhaler Adherence: An Actor-Partner Interdependence Model Analysis.
- Liu C, Zheng H, Gao M, Sun L, Han L, Gao N.
- Int J Chron Obstruct Pulmon Dis. 2026 Oct 16;21:634930. doi: 10.2147/COPD.S634930.
- PMCID: PMC13682309
Liu C, et al.Int J Chron Obstruct Pulmon Dis. 2026.PMCID: PMC13682309