Insulin-Like Growth Factor 1 (IGF-1)

Additional Information:

EPIC Test Name: INSULIN-LIKE GROWTH FACTOR-1

0 decimal points (e.g., 97 ng/mL)

CPT Code(s):

84305

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

Performed:

Monday-Friday