Insulin-Like Growth Factor 1 (IGF-1)

Methodology: 
Solid-phase enzyme-labeled chemiluminescent immunometric assay
Specimen Requirements: 
Collect at least 1.0 mL of blood into an SST/gold-top tube or alternatively a light-green/lithium heparin tube.. Let it clot for 30 - 45 minutes, and then, spin-down and separate the serum/plasma from the cells of the specimen.
  • Required Volume: 1.0 mL blood
  • Minimum Volume: 0.3 mL serum
  • Rejection: Lipemic/Grossly hemolyzed samples
  • Storage Temperature:
    • Refrigerated: 2 - 8º C (up to 24 hours)
    • Frozen: -25º C (up to 12 months)
Reference Values: 

Normal Range Reference Intervals for IGF-1

 

Females

Age

ng/mL

Age (Years)

ng/mL

Age (Years)

ng/mL

1 - 15 Days

Not established 10 97 - 453 26 - 30 117 - 321

16 Days –

5 Months

48 - 313 11 122 - 551 31 - 35 113 - 297

6 - 11

Months

57 - 344 12 155 - 680 36 - 40
106 - 277

1 Year

55 - 327 13 190 - 805 41 - 45 98 - 261

2 Years

51 - 303 14 222 - 896 46 - 50 91 - 246

3 Years

49 - 289 15 238 - 917 51 - 55 84 - 233

4 Years

49 - 283 16 228 - 839 56 - 60 78 - 220

5 Years

50 - 286 17 194 - 680 61 - 65 72 - 207

6 Years

52 - 297 18 162 - 541 66 - 70 67 - 195

7 Years

62 - 316 19 138 - 442 71 - 75 62 - 184

8 Years

70 - 344 20 122 - 384 76 - 80 57 - 172

9 Years

81 - 389 21  - 25 116 - 341 > 80 53 - 162

 

Males

Age (Years) ng/mL Age (Years) ng/mL Age (Years) ng/mL

1 - 15 Days

Not established 10 80 - 438 26 - 30 117 - 321

16 Days -

5 Months

48 - 313 11 101 - 538 31 - 35 113 - 297

6 - 11 Months

57 - 344 12 131 - 690 36 - 40 106 - 277

1 Year

55 - 327 13 172 - 872 41 - 45 98 - 261

2 Years

51 - 303 14 215 - 1026 46 - 50 91 - 246

3 Years

49 - 289 15 236 - 1060 51 - 55 84 - 233

4 Years

49 - 283 16 227 - 964 56 - 60 78 - 220

5 Years

50 - 286 17 199 - 795 61 - 65 72 - 207

6 Years

52 - 297 18 170 - 640 66 - 70 67 - 195

7 Years

52 - 300 19 147 - 527 71 - 75 62 - 184

8 Years

58 - 329 20 132 - 457 76 - 80 57 - 172

9 Years

67 - 373 21 - 25 116 - 341 > 80 53 - 162

 

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
CPT Code (s): 
84305
Notes: 
0 decimal points (e.g., 97 ng/mL)
 

UFHPL Test #: 60080

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