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Increased Risk of Dementia in Patients With Chronic Obstructive Pulmonary Disease
Liao KM, Ho CH, Ko SC, Li CY.. Medicine, 2015-06-01
Topic: Air pollution and environmental exposures
Neurodegenerative disease in patients with chronic obstructive pulmonary disease (COPD) was observed. We aim to clarify the risk of dementia in patients with COPD. The study used claims data from Taiwan's National Health Insurance Research Database. Subjects were those who received a discharge diagnosis of COPD between January 1, 2002 and December 31, 2011. Only the first hospitalization was enrolled, and the index date was the first day of admission. Patients younger than 40 years or those with a history of Alzheimer disease (AD) or Parkinson disease (PD) before the index date were excluded. The patients with COPD were then followed until receiving a diagnosis of AD or PD, death, or the end of the study. Control subjects were selected from hospitalized patients without a history of COPD, AD, or PD and were matched according to age (±3 years), gender, and the year of admission at a 2:1 ratio. The comorbidities were measured from 1 year before the index date based on the ICD-9-CM codes. The study included 8640 patients with COPD and a mean age of 68.76 (±10.74) years. The adjusted hazard ratio of developing dementia (AD or PD) was 1.74 (95% confidence interval = 1.55-1.96) in patients with COPD compared with patients without COPD after adjusting for age, gender, and comorbidities. This nationwide cohort study demonstrates that the risk of dementia, including AD and PD, is significantly increased in patients with COPD compared with individuals in the general population.
Cite this study APA, Vancouver, BibTeX · download .bib or .ris
APA 7th
Liao, K. M., Ho, C. H., Ko, S. C., & Li, C. Y. (2015). Increased Risk of Dementia in Patients With Chronic Obstructive Pulmonary Disease. Medicine. https://doi.org/10.1097/md.0000000000000930
Vancouver
Liao KM, Ho CH, Ko SC, Li CY. Increased Risk of Dementia in Patients With Chronic Obstructive Pulmonary Disease. Medicine. 2015. doi:10.1097/md.0000000000000930. PMID: 26061317.
BibTeX
@article{liao2015-26061317,
author = {Liao, K. M. and Ho, C. H. and Ko, S. C. and Li, C. Y.},
title = {{Increased Risk of Dementia in Patients With Chronic Obstructive Pulmonary Disease}},
journal = {Medicine},
year = {2015},
doi = {10.1097/md.0000000000000930},
pmid = {26061317},
url = {https://doi.org/10.1097/md.0000000000000930}
}
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Key findings
- The adjusted hazard ratio of developing dementia (AD or PD) was 1.74 (95% confidence interval = 1.55-1.96) in patients with COPD compared with patients without COPD after adjusting for age, gender, and comorbidities.
- This nationwide cohort study demonstrates that the risk of dementia, including AD and PD, is significantly increased in patients with COPD compared with individuals in the general population.
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Study details
- Study designcohort study
- Participants8,640
- Evidence strengthModerate
How this study scored 66/100
Published in a peer-reviewed journal, and it is a cohort study following people over time. Scored zero for effect reported and randomised / blinded because the record does not state it. We have no data on journal's citation record, times cited, citations per year, impact for its field and year, cited by studies here, still being cited, senior author's track record, institution's track record and multi-centre collaboration, so those were left out: it earned 38 of the 58 points we could judge it on, which is 66 out of 100.
| Component | Points | Why |
|---|---|---|
| Journal tier | 7 / 10 | Tier 3 — peer-reviewed journal (Medicine) |
| Journal's citation record | — / 4 | No journal record from OpenAlex — left out of this score |
| Study design | 7 / 12 | A cohort study following people over time |
| Strength of evidence | 3 / 5 | Rated “moderate” in our summary |
| Peer-review validation | 10 / 10 | Peer-reviewed. Published as an article in a named peer-reviewed journal. |
| How recent | 1 / 5 | 2015 — within 20 year(s) of the newest study here |
| Sample size | 3 / 4 | 8,640 participants |
| Effect reported | 0 / 3 | No effect size reported — scores zero (not stated in the record — scored 0) |
| Studied in people | 3 / 3 | Studied in people (participant count stated) |
| Randomised / blinded | 0 / 2 | No randomisation or blinding stated — scores zero (not stated in the record — scored 0) |
| Times cited | — / 7 | No citation count (not found in OpenAlex) — left out of this score |
| Citations per year | — / 5 | No citation count or no year — left out of this score |
| Impact for its field and year | — / 6 | No field-weighted citation impact (OpenAlex has none yet) — left out of this score |
| Cited by studies here | — / 6 | Not yet checked against this library's citation graph — left out of this score |
| Still being cited | — / 4 | No yearly citation counts — left out of this score |
| Senior author's track record | — / 4 | Senior author's record not available — left out of this score |
| Institution's track record | — / 3 | No institution listed in OpenAlex — left out of this score |
| Multi-centre collaboration | — / 3 | Institutions not listed — left out of this score |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 26061317) |
| Free to read | 2 / 2 | Free to read |
| Points | 38 / 58 | Scored on 11 of 20 parts. We have no data for the rest, so they are left out: 38 of the 58 points we could judge it on is 66 out of 100. |
| Total | 66 / 100 | — |
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