Table 4 Corrected calcium levels (mmol/L)

Sample

Test age

Calcium level

No.

Minimum

Maximum

Venous

0 to 1 day

Hypocalcaemia

2

1.90

2.19

Normal

82

2.26

2.65

Hypercalcaemia

268

2.66

3.28

>  1 to 2 days

Normal

45

2.13

2.77

>  2 to 7 days

Hypocalcaemia

2

2.19

2.22

Normal

45

2.25

2.72

Hypercalcaemia

3

2.75

3.08

Cord blood

0 to 1 day

Hypocalcaemia

3

2.21

2.27

Normal

119

2.33

2.97

Hypercalcaemia

0

–

–