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Usha Govindarajulu
Usha Govindarajulu

15 Followers

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Jan 9

Statistical issues in survival analyses (Part I)

January 3, 2022 In an article originally published online August 13, 2021, but published recently in print, Vakulenko-Lagun et al discuss a technique to handle dependence between event times and left truncation. The left truncation generally happens due when there is delayed entry into an observational study. Though other methodologies…

3 min read

3 min read


Dec 26, 2022

Issues in COVID-19 research and statistical analyses (Part XVVXVVVI)

December 21, 2022 In an article published on December 14, 2022 in MSN.com, researchers had been studying the effect of COVID-19 and exercise and had found a strong correlation or link between the disease and exercise according to research cited from an article published in the American Journal of Preventive…

2 min read

2 min read


Dec 12, 2022

Issues in COVID-19 research and statistical analyses (Part XVVXVVV)

December 5, 2022 A recent article that appeared December 1 in JAMA Open Network shows the retrospective analysis of Remdesivir treatment for inpatient mortality among COVID-19 patients using insurance claims data amongst 24,856 adults hospitalized between May 1, 2020 and May 3, 2021. …

2 min read

2 min read


Nov 30, 2022

Issues in COVID-19 research and statistical analyses (Part XVVXVVIV)

November 23, 2022 In an article from November 11, 2022 in Health News from NPR, Rob Stein lays out the likelihood of two new Omicron subvariants, BQ.1 and BQ.11 of SARS-Cov-2 having become dominant in the United States and leading to a winter surge in cases. These two subvariants have…

2 min read

2 min read


Nov 14, 2022

Issues in COVID-19 research and statistical analyses (Part XVVXVVIII)

November 9, 2022 In a recent article from November 1 in Science Immunology, the authors reported on their analysis of T-cell immunity four weeks and six months after different vaccination regimens and four weeks after an additional booster vaccination. This was a prospective cohort study started in 2021 located in…

3 min read

3 min read


Oct 31, 2022

Issues in COVID-19 research and statistical analyses (Part XVVXVVII)

Issues in COVID-19 research and statistical analyses (Part XVVXVVII) October 26, 2022 In a letter to the editor, the authors stated that they previously reported on the incidence of myocarditis in Israel after receipt of the BNT162b2 messenger RNA vaccine (Pfizer–BioNTech) against coronavirus disease 2019 (Covid-19) to have been the…

2 min read

2 min read


Oct 17, 2022

Issues in COVID-19 research and statistical analyses (Part XVVXVVI)

October 13, 2022 A recent article in JAMA, “Association of Primary and Booster Vaccination and Prior Infection With SARS-CoV-2 Infection and Severe COVID-19 Outcomes” focuses on looking at the association of COVID-19 vaccination and boosters or prior infection with subsequent infection and severe COVID-19 outcomes. A cohort study of 10.6…

5 min read

5 min read


Oct 3, 2022

Issues in COVID-19 research and statistical analyses (Part XVVXVV)

September 26, 2022 A recent article in New Medical Life Sciences, “Researchers explore neurological manifestations among long COVID patients” focuses on an article that appeared in Nature Medicine regarding a published study on assessing long-term neurological sequelae in the post-acute phase of Sars-CoV-2. The data were, however, obtained from a…

2 min read

2 min read


Sep 19, 2022

Issues in COVID-19 research and statistical analyses (Part XVVXVIV)

September 14, 2022 According to a recent article in Nature Communications, regular rapid testing provided two-fold benefits: identifying infectious individuals and providing positive tests sufficiently early during infection that treatment with antivirals can effectively inhibit development of severe disease. …

4 min read

4 min read


Sep 5, 2022

Issues in COVID-19 research and statistical analyses (Part XVVXVIII)

August 31, 2022 In a recent article in NEJM that appeared this month, researchers conducted a double-blind randomized placebo-controlled trial of metformin, ivermectin, and fluvoxamine to study their effectiveness against outcomes related to COVID-19. They used a 2x3 factorial design approach in this study of non-hospitalized adults who had been…

3 min read

3 min read

Usha Govindarajulu

Usha Govindarajulu

15 Followers

Usha Govindarajulu is a writer and biostatistician . www.UshaGovindarajulu.com

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