They said the association was so strong they could predict Covid patient outcomes just by their age and vitamin D levels.
From: Daily Mail
Does vitamin D protect against Covid after all? Israeli study finds patients who are deficient are up to 14 TIMES more likely to fall severely ill
4 February 2022
… Previous research has been criticised for only looking at vitamin D levels when the Covid patient was already in hospital. [Ed. – not entirely true. Many patients in this landmark October 2021 study had their levels tested prior to hospitalization: COVID-19 Mortality Risk Correlates Inversely with Vitamin D3 Status, and a Mortality Rate Close to Zero Could Theoretically Be Achieved at 50 ng/mL 25(OH)D3…]
Being ill is known to make levels of the vitamin drop, which may have skewed findings, according to critics.
To overcome this limitation, in their latest study, researchers from Bar Ilan University and the Galilee Medical Center looked at patient records up to two years before they were diagnosed with Covid.
They found people who were consistently deficient in the vitamin were up to 14 times more likely to suffer severe disease, even after adjusting for age and other underlying health woes.
The patients were in hospital before Israel’s vaccine rollout was widespread….

[CHART: Not many ill above 50 ng/ml. Critical are below 20 ng/ml – ed.]
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