%0 Journal Article %1 Baxter2010 %A Baxter, Roger %A Lee, Janelle %A Fireman, Bruce %D 2010 %J The Journal of infectious diseases %K 80andover AgeFactors Aged California California:epidemiology Female Human Human:immunology Human:mortality Humans Influenza InfluenzaVaccines InfluenzaVaccines:immunology Male ProspectiveStudies RiskFactors SelectionBias %N 2 %P 186-9 %R 10.1086/649568 %T Evidence of bias in studies of influenza vaccine effectiveness in elderly patients. %U http://www.ncbi.nlm.nih.gov/pubmed/19995265 %V 201 %X Although studies have shown influenza vaccines to be effective in preventing death in the elderly population, these findings may be the result of selection bias. We examined the relationship between vaccination, age, underlying morbidity, and probability of death in the upcoming year. Vaccination coverage varied in a curvilinear fashion with age, morbidity, and risk of death. Forgoing vaccination predicted death in those who had received vaccinations in the previous 5 years, but it predicted survival in patients who had never before received a vaccination. We conclude that bias is inherent in studies of influenza vaccination and death among elderly patients. %@ 1537-6613; 0022-1899

@article{Baxter2010, abstract = {Although studies have shown influenza vaccines to be effective in preventing death in the elderly population, these findings may be the result of selection bias. We examined the relationship between vaccination, age, underlying morbidity, and probability of death in the upcoming year. Vaccination coverage varied in a curvilinear fashion with age, morbidity, and risk of death. Forgoing vaccination predicted death in those who had received vaccinations in the previous 5 years, but it predicted survival in patients who had never before received a vaccination. We conclude that bias is inherent in studies of influenza vaccination and death among elderly patients.}, added-at = {2023-02-03T11:44:35.000+0100}, author = {Baxter, Roger and Lee, Janelle and Fireman, Bruce}, biburl = {https://www.bibsonomy.org/bibtex/266779d8fe5b8f9081fb41b2cc338402b/jepcastel}, city = {Vaccine Study Center, Kaiser Permanente, Oakland, California 94612, USA. roger.baxter@kp.org}, doi = {10.1086/649568}, interhash = {8459b2565e5643c9985727f997a24a15}, intrahash = {66779d8fe5b8f9081fb41b2cc338402b}, isbn = {1537-6613; 0022-1899}, issn = {1537-6613}, journal = {The Journal of infectious diseases}, keywords = {80andover AgeFactors Aged California California:epidemiology Female Human Human:immunology Human:mortality Humans Influenza InfluenzaVaccines InfluenzaVaccines:immunology Male ProspectiveStudies RiskFactors SelectionBias}, month = {1}, note = {7257<m:linebreak></m:linebreak>JID: 0413675; 0 (Influenza Vaccines); ppublish;<m:linebreak></m:linebreak>Mesures d&#039;associació; Bias; Exemple; Grip}, number = 2, pages = {186-9}, pmid = {19995265}, timestamp = {2023-02-03T11:44:35.000+0100}, title = {Evidence of bias in studies of influenza vaccine effectiveness in elderly patients.}, url = {http://www.ncbi.nlm.nih.gov/pubmed/19995265}, volume = 201, year = 2010 }