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HelpTest Code IGF1 Insulin-like Growth Factor 1
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0mL
Minimum Volume: 0.5mL serum
Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours
For non-inhouse samples, please aliquot sample into secondary tube, to send frozen samples to NUH Lab.
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type: | Serum |
|---|---|
| Ambient: | 24 hours |
| Refrigerate: | 48 hours |
| Frozen: | 28 days |
Reference Interval
| Age | Male (ug/L) | Female (ug/L) |
|---|---|---|
| <1yr | 18-156 | 14-192 |
| 1yr | 14-203 | 23-243 |
| 2yrs | 16-222 | 28-256 |
| 3yrs | 22-229 | 31-249 |
| 4yrs | 30-236 | 33-237 |
| 5yrs | 39-250 | 36-234 |
| 6yrs | 47-275 | 39-246 |
| 7yrs | 54-312 | 44-279 |
| 8yrs | 61-356 | 51-334 |
| 9yrs | 67-405 | 61-408 |
| 10yrs | 73-456 | 73-495 |
| 11yrs | 79-506 | 88-585 |
| 12yrs | 84-551 | 104-665 |
| 13yrs | 90-589 | 120-719 |
| 14yrs | 95-618 | 136-729 |
| 15yrs | 99-633 | 147-691 |
| 16yrs | 104-633 | 153-611 |
| 17yrs | 107-615 | 149-509 |
| 18yrs | 132-476 | 156-466 |
| 19yrs | 134-450 | 155-449 |
| 20yrs | 136-421 | 152-429 |
| 21yrs | 137-394 | 148-410 |
| 22yrs | 137-370 | 143-392 |
| 23yrs | 136-348 | 138-375 |
| 24yrs | 135-328 | 134-359 |
| 25yrs | 132-310 | 130-343 |
| 26yrs | 130-295 | 126-329 |
| 27yrs | 128-282 | 122-315 |
| 28yrs | 125-271 | 118-303 |
| 29yrs | 123-263 | 115-292 |
| 30yrs | 120-257 | 112-281 |
| 31yrs | 118-253 | 109-271 |
| 32yrs | 116-250 | 107-263 |
| 33yrs | 114-247 | 104-255 |
| 34yrs | 111-244 | 102-248 |
| 35yrs | 109-242 | 100-242 |
| 36yrs | 107-239 | 98-238 |
| 37yrs | 105-236 | 97-234 |
| 38yrs | 103-234 | 95-231 |
| 39yrs | 101-231 | 93-228 |
| 40yrs | 99-229 | 91-227 |
| 41yrs | 96-226 | 90-225 |
| 42yrs | 94-223 | 88-224 |
| 43yrs | 92-221 | 87-222 |
| 44yrs | 91-218 | 85-221 |
| 45yrs | 89-216 | 83-220 |
| 46yrs | 87-214 | 82-219 |
| 47yrs | 85-211 | 80-218 |
| 48yrs | 83-209 | 79-218 |
| 49yrs | 81-207 | 77-217 |
| 50yrs | 79-205 | 76-215 |
| 51yrs | 77-203 | 74-214 |
| 52yrs | 75-201 | 73-212 |
| 53yrs | 73-200 | 71-210 |
| 54yrs | 71-198 | 70-207 |
| 55yrs | 69-196 | 69-204 |
| 56yrs | 67-195 | 67-201 |
| 57yrs | 65-194 | 66-198 |
| 58yrs | 64-193 | 65-194 |
| 59yrs | 62-192 | 63-190 |
| 60yrs | 61-191 | 62-186 |
| 61yrs | 60-190 | 61-182 |
| 62yrs | 59-189 | 60-179 |
| 63yrs | 59-188 | 58-176 |
| 64yrs | 58-188 | 57-173 |
| 65yrs | 57-187 | 56-170 |
| 66yrs | 57-186 | 56-168 |
| 67yrs | 56-186 | 55-166 |
| 68yrs | 56-186 | 54-164 |
| 69yrs | 55-185 | 54-163 |
| 70yrs | 55-185 | 54-162 |
| 71yrs | 54-184 | 53-161 |
| 72yrs | 54-184 | 53-160 |
| 73yrs | 53-184 | 53-160 |
| 74yrs | 52-184 | 53-160 |
| 75yrs | 52-184 | 54-160 |
| 76yrs | 51-184 | 54-161 |
| 77yrs | 51-184 | 54-162 |
| ≥78yrs | 50-184 | NA |
| 78yrs | NA | 54-163 |
| 79yrs | NA | 55-164 |
| ≥80yrs | NA | 55-166 |
Days and Times Performed
Monday to Friday, TAT 4 days
Methodology
Electrochemiluminescence
Service Code
31891
Update
Last updated 29/12/2022
Updated on Reference Interval
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | NA |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Diagnosis of human growth hormone excess and deficiency disorders
Alias
Somatomedin C