| Title |
Association between hemoglobin and prognosis in patients admitted to hospital for COPD
|
|---|---|
| Published in |
International Journal of Chronic Obstructive Pulmonary Disease, November 2016
|
| DOI | 10.2147/copd.s116269 |
| Pubmed ID | |
| Authors |
Anne Pernille Toft-Petersen, Christian Torp-Pedersen, Ulla Møller Weinreich, Bodil Steen Rasmussen |
| Abstract |
Low concentrations of hemoglobin have previously been demonstrated in many patients with COPD. There is evidence of anemia as a prognostic factor in acute exacerbations, but the detailed relationship between concentrations of hemoglobin and mortality is not known. A register-based cohort of patients admitted for the first time to Danish hospitals for acute exacerbations of COPD from 2007 through 2012 was established. Age, sex, comorbidities, medication, renal function, and concentrations of hemoglobin were retrieved. Sex-specific survival analyses were fitted for different rounded concentrations of hemoglobin. The cohort encompassed 6,969 patients. Hemoglobin below 130 g/L was present in 39% of males and below 120 g/L in 24% of females. The in-hospital mortality rates for patients with hemoglobin below or above these limits were 11.6% and 5.4%, respectively. After discharge, compared to hemoglobin 130 g/L, the hazard ratio (HR) for males with hemoglobin 120 g/L was 1.45 (95% confidence interval [CI] 1.22-1.73), adjusted HR 1.37 (95% CI 1.15-1.64). Compared to hemoglobin 120 g/L, the HR for females with hemoglobin 110 g/L was 1.4 (95% CI 1.17-1.68), adjusted HR 1.28 (95% CI 1.06-1.53). In conclusion, low concentrations of hemoglobin are frequent in COPD patients with acute exacerbations, and predict long-term mortality. |
X Demographics
The data shown below were collected from the profiles of 24 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 | 3 | 13% |
| United States | 2 | 8% |
| India | 1 | 4% |
| Spain | 1 | 4% |
| Australia | 1 | 4% |
| Argentina | 1 | 4% |
| Venezuela, Bolivarian Republic of | 1 | 4% |
| El Salvador | 1 | 4% |
| Ecuador | 1 | 4% |
| Other | 3 | 13% |
| Unknown | 9 | 38% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 18 | 75% |
| Practitioners (doctors, other healthcare professionals) | 4 | 17% |
| Scientists | 2 | 8% |
Mendeley readers
The data shown below were compiled from readership statistics for 48 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 48 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Bachelor | 5 | 10% |
| Student > Postgraduate | 5 | 10% |
| Student > Master | 5 | 10% |
| Student > Ph. D. Student | 4 | 8% |
| Researcher | 4 | 8% |
| Other | 3 | 6% |
| Unknown | 22 | 46% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 22 | 46% |
| Biochemistry, Genetics and Molecular Biology | 2 | 4% |
| Nursing and Health Professions | 1 | 2% |
| Immunology and Microbiology | 1 | 2% |
| Agricultural and Biological Sciences | 1 | 2% |
| Other | 0 | 0% |
| Unknown | 21 | 44% |
Attention Score in Context
This research output has an Altmetric Attention Score of 14. 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 17 January 2017.
All research outputs
#2,599,685
of 25,582,611 outputs
Outputs from International Journal of Chronic Obstructive Pulmonary Disease
#256
of 2,571 outputs
Outputs of similar age
#43,000
of 318,337 outputs
Outputs of similar age from International Journal of Chronic Obstructive Pulmonary Disease
#12
of 82 outputs
Altmetric has tracked 25,582,611 research outputs across all sources so far. Compared to these this one has done well and is in the 89th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 2,571 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 done particularly well, scoring higher than 90% 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 318,337 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 86% of its contemporaries.
We're also able to compare this research output to 82 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 85% of its contemporaries.