Additional Information:
EPIC Test Name: INSULIN-LIKE GROWTH FACTOR-1
CPT Code(s):
Collection Procedure:
Collect specimen in SST tube. Allow to clot. Centrifuge and store refrigerated. Transport to lab.
Specimen Requirements:
Specimen Type: Serum (preferred) or Plasma
Container/Tube: SST or Lithium Heparin (Green top)
Sample Volume: 1 mL
Minimum Volume: 0.2 mL (Repeat testing is not possible with this specimen volume.)
Storage: Refrigerate
Stability (collection to time of analysis/testing):
- Refrigerated: 24 hours
- Frozen: 12 months
Methodology:
Solid-phase enzyme-labeled chemiluminescent immunometric assay
Reported:
1-3 Business Days
Reference Values:
Normal Range Reference Intervals for IGF-1
Females
|
Age (Years) |
ng/mL |
Age (Years) |
ng/mL |
|
0 – 4 |
18.2 – 172 | 40 – 45 | 58.2 – 219 |
|
4 – 7 |
35.4 – 232 | 45 – 50 | 53.3 – 215 |
|
7 – 10 |
56.9 – 277 | 50 – 55 | 48.1 – 209 |
|
10 – 12 |
118 – 448 | 55 – 60 | 44.7 – 210 |
|
12 – 14 |
170 – 527 | 60 – 65 | 43 – 220 |
|
14 – 16 |
191 – 496 | 65 – 70 | 40.2 – 225 |
|
16 – 19 |
190 – 429 | 70 – 80 | 35.1 – 216 |
|
19 – 22 |
117 – 232 | 80 – 90 | 30.6 – 208 |
|
22 – 25 |
98.7 – 289 | ||
|
25 – 30 |
83.6 – 259 | ||
|
30 – 35 |
71.2 – 234 | ||
|
35 – 40 |
63.4 – 223 |
Males
| Age (Years) | ng/mL | Age (Years) | ng/mL |
|
0 – 4 |
0 – 129 | 40 – 45 | 58.2 – 219 |
|
4 – 7 |
22 – 208 | 45 – 50 | 53.3 – 215 |
|
7 – 10 |
40.1 – 255 | 50 – 55 | 48.1 – 209 |
|
10 – 12 |
68.7 – 316 | 55 – 60 | 44.7 – 210 |
|
12 – 14 |
143 – 506 | 60 – 65 | 43 – 220 |
|
14 – 16 |
177 – 507 | 65 – 70 | 40.2 – 225 |
|
16 – 19 |
173 – 414 | 70 – 80 | 35.1 – 216 |
|
19 – 22 |
117 – 232 | 80 – 90 | 30.6 – 208 |
|
22 – 25 |
98.7 – 289 | ||
|
25 – 30 |
83.6 – 259 | ||
|
30 – 35 |
71.2 – 234 | ||
|
35 – 40 |
63.4 – 223 |
Tanner Stages (from Emlinger)
| Tanner Stage | Females | Males |
| I | 49- 342 ng/mL | 63- 279 ng/mL |
| II | 115- 428 ng/mL | 75- 420 ng/mL |
| III | 145- 760 ng/mL | 94 – 765 ng/mL |