Short-term effects of high-dose oral vitamin D3 in critically ill vitamin D deficient patients: a randomized, double-blind, placebo-controlled pilot study.

Interestingly, hospital mortality in patients who became normocalcemic on day 3 (ionized calcium ≥1.15 mmol/l) compared with those who remained in the hypocalcemic range was lower (20% versus 55%) although this difference did not reach statistical significance.

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