Table 3.

Sensitivity of Insulin-Like Growth Factor-1 Values in the Diagnosis of Growth Hormone Deficiency

	IGF-1 Deficient	IGF-1 Normal
GHD	20%	42%
peak GH ≤ 5μg/L	(N = 48)	(N = 98)
	True	False
	Positive	Negative
nGHD	15%	23%
	(N = 36)	(N = 53)
	False	True
	Positive	Negative
		N = 235
Reference range for IGF-1 based on age and gender

Patients were categorized into insulin-like growth factor-1 (IGF-1) deficient or IGF-1 normal groups based on age and sex reference ranges. Patients were also classified as being growth hormone deficient (GHD) or non-GHD (nGHD) on the basis of results from the glucagon stimulation test (GST).