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Use of GHST and IGF-1 testing reported in the NCGS registry.
| All years N = 51,909 | 2000–2005 n = 16,481 | |
|---|---|---|
| Stimulation test performed, % | 70 | 53 |
| Stimulation testing only performed, % | 50 | 18 |
| Stimulation testing performed with IGF-1, % | 20 | 35 |
| IGF-1 test performed, % | 24 | 41 |
| IGF-1 test performed in absence of stimulation testing, % | 4 | 6 |
| Stimulation test performed with insulin, % | 29 | 20 |
GHST: growth hormone stimulation test; IGF-1: insulin-like growth factor 1; NCGS: National Cooperative Growth Study.
