Letter: low population mortality from COVID-19 in countries south of latitude 35 degrees North supports vitamin D as a factor determining severity.

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

Who cites it

6 citing papers in PubMed.

1. Vitamin D and Platelets: A Menacing Duo in COVID-19 and Potential Relation to Bone Remodeling.International journal of molecular sciences · 2021
   Review
2. Association between population vitamin D status and SARS-CoV-2 related serious-critical illness and deaths: An ecological integrative approach.World journal of virology · 2021
   Article
3. Vitamin D and COVID-19: It is time to act.International journal of clinical practice · 2021
   Article
4. Sunlight ultraviolet radiation dose is negatively correlated with the percent positive of SARS-CoV-2 and four other common human coronaviruses in the U.S.The Science of the total environment · 2021
   Article
5. Letter: low population mortality from COVID-19 in countries south of latitude 35° North supports vitamin D as a factor determining severity. Authors' reply.Alimentary pharmacology & therapeutics · 2020
   Article
6. A Basic Review of the Preliminary Evidence That COVID-19 Risk and Severity Is Increased in Vitamin D Deficiency.Frontiers in public health · 2020
   Review

Corrections and comments

• Commented on by
  Letter: low population mortality from COVID-19 in countries south of latitude 35° North supports vitamin D as a factor determining severity. Authors' reply.2020
• Comment on
  Review article: prevention, diagnosis and management of COVID-19 in the IBD patient.2020

Authors and funding

1 author.

Funding

No grant is acknowledged in the PubMed record.

Abstract

PubMed holds no abstract for this paper.