Reference Range
The normal glucose reference ranges are as below
:
Cord – 45-96 mg/dL or 2.5-5.3 mmol/L (SI units)
Premature infant – 20-60 mg/dL or 1.1-3.3 mmol/L
Neonate – 30-60 mg/dL or 1.7-3.3 mmol/L
Infant – 40-90 mg/dL or 2.2-5.0 mmol/L
Child < 2 years – 60-100 mg/dL or 3.3-5.5 mmol/L
Adult – 74-106 mg/dL or 4.1-5.9 mmol/L
For children over age 2 years to adult, the normal reference ranges are as follows
:
Fasting (ie, no caloric intake for at least 8 hours) – 70-100 mg/dL or < 5.5 mmol/L
Casual or random (ie, any time of day, with no regard to food intake) – ≤200 mg/dL (< 11.1 mmol/L)
For elderly patients, the normal reference ranges are as follows
:
60-90 years – 82-115 mg/dL or 4.6-6.4 mmol/L
>90 years – 75-121 mg/dL or 4.2-6.7 mmol/L
Possible critical values
These are as follows
:
Adult male – < 50 and >400 mg/dL
Adult female – < 40 and >400 mg/dL
Infant – < 40 mg/dL
Newborn – < 30 and >300 mg/dL
Two-hour postprandial glucose
Normal values are as follows
:
0-50 years – < 140 mg/dL or < 7.8 mmol/L (SI units)
50-60 years – < 150 mg/dL
60 years and older – < 160 mg/dL