Cargando…
Influenza infection and risk of acute pulmonary embolism
BACKGROUND: Influenza infections have been associated with procoagulant changes. Whether influenza infections lead to an increased risk of pulmonary embolism remains to be established. METHODS: We conducted a nested case control study in a large cohort of patients with a clinical suspicion of having...
Autores principales: | , , , , , , , , |
---|---|
Formato: | Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2007
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2104525/ https://www.ncbi.nlm.nih.gov/pubmed/17939867 http://dx.doi.org/10.1186/1477-9560-5-16 |
_version_ | 1782138346117529600 |
---|---|
author | van Wissen, Matthijs Keller, Tymen T Ronkes, Brechje Gerdes, Victor EA Zaaijer, Hans L van Gorp, Eric CM Brandjes, Dees PM Levi, Marcel Büller, Harry R |
author_facet | van Wissen, Matthijs Keller, Tymen T Ronkes, Brechje Gerdes, Victor EA Zaaijer, Hans L van Gorp, Eric CM Brandjes, Dees PM Levi, Marcel Büller, Harry R |
author_sort | van Wissen, Matthijs |
collection | PubMed |
description | BACKGROUND: Influenza infections have been associated with procoagulant changes. Whether influenza infections lead to an increased risk of pulmonary embolism remains to be established. METHODS: We conducted a nested case control study in a large cohort of patients with a clinical suspicion of having pulmonary embolism. Blood samples were collected to investigate the presence of influenza A and B by complement fixation assay (CFA). We compared case patients, in whom pulmonary embolism was proven (n = 102), to controls, in whom pulmonary embolism was excluded (n = 395). Furthermore, we compared symptoms of influenza-like illness in both patient groups 2 weeks prior to inclusion in the study, using the influenza-like illness (ILI) score, which is based on a questionnaire. We calculated the risk of pulmonary embolism associated with influenza infection. RESULTS: The percentage of patients with influenza A was higher in the control group compared to the case group (4.3% versus 1.0%, respectively, odds ratio 0.22; 95% CI: 0.03–1.72). Influenza B was not detectable in any of the cases and was found in 3 of the 395 controls (0.8%). The ILI score was positive in 24% of the cases and 25% in the control persons (odds ratio 1.16, 95% CI: 0.67–2.01). We did not observe an association between the ILI score and proven influenza infection. CONCLUSION: In this clinical study, influenza infection was not associated with an increased risk of acute pulmonary embolism. The ILI score is non-specific in this clinical setting. |
format | Text |
id | pubmed-2104525 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2007 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-21045252007-12-04 Influenza infection and risk of acute pulmonary embolism van Wissen, Matthijs Keller, Tymen T Ronkes, Brechje Gerdes, Victor EA Zaaijer, Hans L van Gorp, Eric CM Brandjes, Dees PM Levi, Marcel Büller, Harry R Thromb J Original Clinical Investigation BACKGROUND: Influenza infections have been associated with procoagulant changes. Whether influenza infections lead to an increased risk of pulmonary embolism remains to be established. METHODS: We conducted a nested case control study in a large cohort of patients with a clinical suspicion of having pulmonary embolism. Blood samples were collected to investigate the presence of influenza A and B by complement fixation assay (CFA). We compared case patients, in whom pulmonary embolism was proven (n = 102), to controls, in whom pulmonary embolism was excluded (n = 395). Furthermore, we compared symptoms of influenza-like illness in both patient groups 2 weeks prior to inclusion in the study, using the influenza-like illness (ILI) score, which is based on a questionnaire. We calculated the risk of pulmonary embolism associated with influenza infection. RESULTS: The percentage of patients with influenza A was higher in the control group compared to the case group (4.3% versus 1.0%, respectively, odds ratio 0.22; 95% CI: 0.03–1.72). Influenza B was not detectable in any of the cases and was found in 3 of the 395 controls (0.8%). The ILI score was positive in 24% of the cases and 25% in the control persons (odds ratio 1.16, 95% CI: 0.67–2.01). We did not observe an association between the ILI score and proven influenza infection. CONCLUSION: In this clinical study, influenza infection was not associated with an increased risk of acute pulmonary embolism. The ILI score is non-specific in this clinical setting. BioMed Central 2007-10-16 /pmc/articles/PMC2104525/ /pubmed/17939867 http://dx.doi.org/10.1186/1477-9560-5-16 Text en Copyright © 2007 van Wissen et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( (http://creativecommons.org/licenses/by/2.0) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Clinical Investigation van Wissen, Matthijs Keller, Tymen T Ronkes, Brechje Gerdes, Victor EA Zaaijer, Hans L van Gorp, Eric CM Brandjes, Dees PM Levi, Marcel Büller, Harry R Influenza infection and risk of acute pulmonary embolism |
title | Influenza infection and risk of acute pulmonary embolism |
title_full | Influenza infection and risk of acute pulmonary embolism |
title_fullStr | Influenza infection and risk of acute pulmonary embolism |
title_full_unstemmed | Influenza infection and risk of acute pulmonary embolism |
title_short | Influenza infection and risk of acute pulmonary embolism |
title_sort | influenza infection and risk of acute pulmonary embolism |
topic | Original Clinical Investigation |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2104525/ https://www.ncbi.nlm.nih.gov/pubmed/17939867 http://dx.doi.org/10.1186/1477-9560-5-16 |
work_keys_str_mv | AT vanwissenmatthijs influenzainfectionandriskofacutepulmonaryembolism AT kellertyment influenzainfectionandriskofacutepulmonaryembolism AT ronkesbrechje influenzainfectionandriskofacutepulmonaryembolism AT gerdesvictorea influenzainfectionandriskofacutepulmonaryembolism AT zaaijerhansl influenzainfectionandriskofacutepulmonaryembolism AT vangorpericcm influenzainfectionandriskofacutepulmonaryembolism AT brandjesdeespm influenzainfectionandriskofacutepulmonaryembolism AT levimarcel influenzainfectionandriskofacutepulmonaryembolism AT bullerharryr influenzainfectionandriskofacutepulmonaryembolism |