| Title |
Hemoglobin and mortality in patients with COPD: a nationwide population-based cohort study
|
|---|---|
| Published in |
International Journal of Chronic Obstructive Pulmonary Disease, May 2018
|
| DOI | 10.2147/copd.s159249 |
| Pubmed ID | |
| Authors |
Seon Cheol Park, Young Sam Kim, Young Ae Kang, Eun Cheol Park, Cheung Soo Shin, Dong Wook Kim, Chin Kook Rhee |
| Abstract |
Previous studies have reported that anemia increased mortality in patients with COPD. However, it is unclear whether anemia is associated with increased COPD mortality in the general population. The purpose of our study is to identify whether anemia is related to long-term mortality in COPD using a large population-based database. Using the National Health Insurance Service-Health Screening Cohort, we identified COPD patients with available hemoglobin level. We analyzed mortality among patients with COPD from 2003 to 2013 according to hemoglobin level. A total of 7,114 patients with COPD were identified. Mean age was 65.0±9.3 years, and 62.9% were male. Anemia was present in 469 patients (6.6%). The overall mortality rate was 46.5% in anemia and 32.1% in non-anemia groups (p<0.001). The hazard ratio of anemia for mortality was 1.31 (95% CI, 1.11-1.54). Among patients with anemia, the hemoglobin level correlated well with mortality. Anemia was associated with increased long-term mortality of COPD, and even mild anemia was related to a significantly increased risk. |
X Demographics
The data shown below were collected from the profiles of 7 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United Kingdom | 2 | 29% |
| Pakistan | 1 | 14% |
| Canada | 1 | 14% |
| Unknown | 3 | 43% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 2 | 29% |
| Scientists | 2 | 29% |
| Practitioners (doctors, other healthcare professionals) | 2 | 29% |
| Science communicators (journalists, bloggers, editors) | 1 | 14% |
Mendeley readers
The data shown below were compiled from readership statistics for 41 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 41 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 4 | 10% |
| Student > Postgraduate | 4 | 10% |
| Researcher | 4 | 10% |
| Student > Ph. D. Student | 3 | 7% |
| Student > Bachelor | 2 | 5% |
| Other | 3 | 7% |
| Unknown | 21 | 51% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 14 | 34% |
| Nursing and Health Professions | 3 | 7% |
| Biochemistry, Genetics and Molecular Biology | 1 | 2% |
| Business, Management and Accounting | 1 | 2% |
| Social Sciences | 1 | 2% |
| Other | 1 | 2% |
| Unknown | 20 | 49% |
Attention Score in Context
This research output has an Altmetric Attention Score of 4. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 04 June 2018.
All research outputs
#7,899,670
of 25,382,440 outputs
Outputs from International Journal of Chronic Obstructive Pulmonary Disease
#952
of 2,578 outputs
Outputs of similar age
#126,759
of 339,234 outputs
Outputs of similar age from International Journal of Chronic Obstructive Pulmonary Disease
#35
of 79 outputs
Altmetric has tracked 25,382,440 research outputs across all sources so far. This one has received more attention than most of these and is in the 68th percentile.
So far Altmetric has tracked 2,578 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 6.5. This one has gotten more attention than average, scoring higher than 62% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 339,234 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 62% of its contemporaries.
We're also able to compare this research output to 79 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 55% of its contemporaries.