Learning from previous methodological pitfalls to propose well-designed trials on vitamin D in COVID-19.

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

3 citing papers in PubMed, 1 synthesis or guideline pooled it, 5 citations in OpenAlex.

1. Vitamin D supplementation and clinical outcomes in COVID-19: a systematic review and meta-analysis.Journal of endocrinological investigation · 2022
   Pooled it
2. Vitamin D supplementation prior to or during COVID-19 associated with better 3-month survival in geriatric patients: Extension phase of the GERIA-COVID study.The Journal of steroid biochemistry and molecular biology · 2021
   Trial
3. Calcifediol Treatment and Hospital Mortality Due to COVID-19: A Cohort Study.Nutrients · 2021
   Trial

Corrections and comments

• Comment on
  Effect of a Single High Dose of Vitamin D3 on Hospital Length of Stay in Patients With Moderate to Severe COVID-19: A Randomized Clinical Trial.2021

Authors and funding

3 authors at 2 institutions in 1 country.

Funding

No grant is acknowledged in the PubMed record.

Abstract

PubMed holds no abstract for this paper.

Indexed as