Background: Over the last decade, clinical interest to evaluate human 25-hydroxy-vitamin D (25[OH]D) serum levels has increased exponentially ... mean bias in three assays (cobas Vitamin D3 assay ...

The aim of this trial was to examine the association between 25-hydroxyvitamin D (25(OH)D) levels and cognitive performance ... Associations between cognitive function and 25(OH)D levels were explored ...

There is a high prevalence of vitamin D deficiency worldwide, but how to define vitamin D deficiency is controversial. Currently, the plasma concentration of total 25-hydroxyvitamin D [25(OH)D] is ...

Patients with diabetes are at a higher risk for acute kidney injury (AKI). Low levels of 25-hydroxy-vitamin D [25(OH)D] have ...

Serum 25-hydroxyvitamin D (25-OHD) was assessed at baseline by radioimmunoassay ... chondral defects and muscle strength). Results Mean total knee WOMAC score was 3.2 (range 0–39). 4.2% of ...