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Start Over Author "Clark Files D" Publisher escholarship, university of california
2 results on '"Clark Files D"'

1. Effectiveness of mRNA Vaccines Against COVID-19 Hospitalization by Age and Chronic Medical Conditions Burden Among Immunocompetent US Adults, March-August 2021

Author

Lewis, Nathaniel M, Naioti, Eric A, Self, Wesley H, Ginde, Adit A, Douin, David J, Keipp Talbot, H, Casey, Jonathan D, Mohr, Nicholas M, Zepeski, Anne, Gaglani, Manjusha, Ghamande, Shekhar A, McNeal, Tresa A, Shapiro, Nathan I, Gibbs, Kevin W, Clark Files, D, Hager, David N, Shehu, Arber, Prekker, Matthew E, Erickson, Heidi L, Gong, Michelle N, Mohamed, Amira, Henning, Daniel J, Steingrub, Jay S, Peltan, Ithan D, Brown, Samuel M, Martin, Emily T, Hubel, Kinsley, Hough, Catherine L, Busse, Laurence W, Ten Lohuis, Caitlin C, Duggal, Abhijit, Wilson, Jennifer G, Gordon, Alexandra J, Qadir, Nida, Chang, Steven Y, Mallow, Christopher, Rivas, Carolina, Babcock, Hilary M, Kwon, Jennie H, Exline, Matthew C, Halasa, Natasha, Chappell, James D, Lauring, Adam S, Grijalva, Carlos G, Rice, Todd W, Rhoads, Jillian P, Stubblefield, William B, Baughman, Adrienne, Womack, Kelsey N, Lindsell, Christopher J, Hart, Kimberly W, Zhu, Yuwei, Schrag, Stephanie J, Kobayashi, Miwako, Verani, Jennifer R, Patel, Manish M, Tenforde, Mark W, and IVY Network Collaborators

Subjects
Adult, Vaccines, Aging, COVID-19 Vaccines, vaccine effectiveness, IVY Network Collaborators, Synthetic, COVID-19, Biological Sciences, chronic medical conditions, Medical and Health Sciences, Microbiology, Hospitalization, Vaccine Related, Good Health and Well Being, preexisting conditions, Chronic Disease, Humans, Immunization, mRNA Vaccines
Abstract

Vaccine effectiveness (VE) against COVID-19 hospitalization was evaluated among immunocompetent adults (≥18 years) during March-August 2021 using a case-control design. Among 1669 hospitalized COVID-19 cases (11% fully vaccinated) and 1950 RT-PCR-negative controls (54% fully vaccinated), VE was 96% (95% confidence interval [CI], 93%-98%) among patients with no chronic medical conditions and 83% (95% CI, 76%-88%) among patients with ≥ 3 categories of conditions. VE was similar between those aged 18-64 years versus ≥65 years (P > .05). VE against severe COVID-19 was very high among adults without chronic conditions and lessened with increasing comorbidity burden.

Published
2022

2. Comparison of test-negative and syndrome-negative controls in SARS-CoV-2 vaccine effectiveness evaluations for preventing COVID-19 hospitalizations in the United States.

Author

Turbyfill, Caitlin, Turbyfill, Caitlin, Adams, Katherine, Tenforde, Mark W, Murray, Nancy L, Gaglani, Manjusha, Ginde, Adit A, McNeal, Tresa, Ghamande, Shekhar, Douin, David J, Keipp Talbot, H, Casey, Jonathan D, Mohr, Nicholas M, Zepeski, Anne, Shapiro, Nathan I, Gibbs, Kevin W, Clark Files, D, Hager, David N, Shehu, Arber, Prekker, Matthew E, Frosch, Anne E, Exline, Matthew C, Gong, Michelle N, Mohamed, Amira, Johnson, Nicholas J, Srinivasan, Vasisht, Steingrub, Jay S, Peltan, Ithan D, Brown, Samuel M, Martin, Emily T, Lauring, Adam S, Khan, Akram, Busse, Laurence W, Ten Lohuis, Caitlin C, Duggal, Abhijit, Wilson, Jennifer G, June Gordon, Alexandra, Qadir, Nida, Chang, Steven Y, Mallow, Christopher, Rivas, Carolina, Kwon, Jennie H, Halasa, Natasha, Chappell, James D, Grijalva, Carlos G, Rice, Todd W, Stubblefield, William B, Baughman, Adrienne, Rhoads, Jillian P, Lindsell, Christopher J, Hart, Kimberly W, McMorrow, Meredith, Surie, Diya, Self, Wesley H, Patel, Manish M, Turbyfill, Caitlin, Turbyfill, Caitlin, Adams, Katherine, Tenforde, Mark W, Murray, Nancy L, Gaglani, Manjusha, Ginde, Adit A, McNeal, Tresa, Ghamande, Shekhar, Douin, David J, Keipp Talbot, H, Casey, Jonathan D, Mohr, Nicholas M, Zepeski, Anne, Shapiro, Nathan I, Gibbs, Kevin W, Clark Files, D, Hager, David N, Shehu, Arber, Prekker, Matthew E, Frosch, Anne E, Exline, Matthew C, Gong, Michelle N, Mohamed, Amira, Johnson, Nicholas J, Srinivasan, Vasisht, Steingrub, Jay S, Peltan, Ithan D, Brown, Samuel M, Martin, Emily T, Lauring, Adam S, Khan, Akram, Busse, Laurence W, Ten Lohuis, Caitlin C, Duggal, Abhijit, Wilson, Jennifer G, June Gordon, Alexandra, Qadir, Nida, Chang, Steven Y, Mallow, Christopher, Rivas, Carolina, Kwon, Jennie H, Halasa, Natasha, Chappell, James D, Grijalva, Carlos G, Rice, Todd W, Stubblefield, William B, Baughman, Adrienne, Rhoads, Jillian P, Lindsell, Christopher J, Hart, Kimberly W, McMorrow, Meredith, Surie, Diya, Self, Wesley H, and Patel, Manish M

Abstract

BackgroundTest-negative design (TND) studies have produced validated estimates of vaccine effectiveness (VE) for influenza vaccine studies. However, syndrome-negative controls have been proposed for differentiating bias and true estimates in VE evaluations for COVID-19. To understand the use of alternative control groups, we compared characteristics and VE estimates of syndrome-negative and test-negative VE controls.MethodsAdults hospitalized at 21 medical centers in 18 states March 11-August 31, 2021 were eligible for analysis. Case patients had symptomatic acute respiratory infection (ARI) and tested positive for SARS-CoV-2. Control groups were test-negative patients with ARI but negative SARS-CoV-2 testing, and syndrome-negative controls were without ARI and negative SARS-CoV-2 testing. Chi square and Wilcoxon rank sum tests were used to detect differences in baseline characteristics. VE against COVID-19 hospitalization was calculated using logistic regression comparing adjusted odds of prior mRNA vaccination between cases hospitalized with COVID-19 and each control group.Results5811 adults (2726 cases, 1696 test-negative controls, and 1389 syndrome-negative controls) were included. Control groups differed across characteristics including age, race/ethnicity, employment, previous hospitalizations, medical conditions, and immunosuppression. However, control-group-specific VE estimates were very similar. Among immunocompetent patients aged 18-64 years, VE was 93 % (95 % CI: 90-94) using syndrome-negative controls and 91 % (95 % CI: 88-93) using test-negative controls.ConclusionsDespite demographic and clinical differences between control groups, the use of either control group produced similar VE estimates across age groups and immunosuppression status. These findings support the use of test-negative controls and increase confidence in COVID-19 VE estimates produced by test-negative design studies.

Published
2022

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