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Table 3 Safety thresholds for ionized calcium, total corrected calcium and elevated calcium-creatinine ratio

From: Prevention of vitamin D deficiency in children following cardiac surgery: study protocol for a randomized controlled trial

Table 3A: Age specific thresholds for pH corrected ionized calcium levels

Age (months)

95th % (mmol/L)

  <2

1.45

  >2

1.4

Table 3B: Threshold for corrected total calcium level

Age (months)

mmol/L

  <3

2.8

  >3

2.7

Table 3C: Age specific thresholds for elevated calcium-creatinine ratio

Age (year)

95th % Ca/Cr ratio (mmol/mmol)

  <1

2.2

  1–2

1.5

  2–3

1.4

  3–5

1.1

  5–7

0.8

  7–17

0.7