The mortality hazard ratio was 2.03 for participants with under 5 nanograms per millilitre of vitamin D compared with those with at least 20.The mortality hazard ratio was 2.03 for participants with under 5 nanograms per millilitre of vitamin D compared with those with at least 20.
Across two large health record databases followed for up to a decade, severely low vitamin D was tied to higher mortality, with hazard ratios of 2.57 and 1.59.Across two large health record databases followed for up to a decade, severely low vitamin D was tied to higher mortality, with hazard ratios of 2.57 and 1.59.