ARUP's Laboratory Test Directory

0070109: Testosterone, Free & Total (Includes Sex Hormone Binding Globulin), Adult Male

Test Mnemonic: FREE T
Methodology: Electrochemiluminescent Immunoassay
The concentration of free testosterone is derived from a mathematical expression based on the constant for the binding of testosterone to sex hormone binding globulin. 

Performed: Sun-Sat

Reported: Within 24 hours

Specimen Required:  
Collect: One 4 mL SST or green (lithium heparin). Specimen should be collected between 6-10 a.m.

Transport: 1 mL serum or plasma at 2-8°C.  (Min: 0.6 mL)  Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport: 0.4 mL serum or plasma at 2-8°C.

Remarks: Separate serum from cells immediately after collection.

Unacceptable Conditions: EDTA plasma.

Stability: After separation from cells: Ambient: 2 days; Refrigerated: 1 week; Frozen: 2 months

Reference Interval:
 
Test Number Components Reference Interval
 Testosterone, Percentage Free 18 years and older:  1.6-2.9%
0099375Sex Hormone Binding Globulin
 
Age Male Female
1-30 days
31-364 days
1-3 years
4-6 years
7-9 years
10-12 years
13-15 years
16-17 years
18 years and older 		13-85 nmol/L
70-250 nmol/L
50-180 nmol/L
45-175 nmol/L
28-190 nmol/L
23-160 nmol/L
13-140 nmol/L
10-60 nmol/L
11-80 nmol/L 		14-60 nmol/L
60-215 nmol/L
60-190 nmol/L
55-170 nmol/L
35-170 nmol/L
17-155 nmol/L
11-120 nmol/L
19-145 nmol/L
30-135 nmol/L
Tanner Stage I
Tanner Stage II
Tanner Stage III
Tanner Stage IV
Tanner Stage V 		26-286 nmol/L
22-169 nmol/L
13-104 nmol/L
11-60 nmol/L
11-71 nmol/L 		30-173 nmol/L
16-127 nmol/L
12-98 nmol/L
14-151 nmol/L
23-165 nmol/L
0070111Testosterone Free, Adult Male  Male:
14-15 years:  3-138 pg/mL
16-17 years:  38-173 pg/mL
18 years and older: 47-244 pg/mL

Tanner Stage IV:  35-169 pg/mL
Tanner Stage V:  41-239 pg/mL
0070130Testosterone, Adult Male Male:
14-15 years: 33-585 ng/dL
16-17 years: 185-886 ng/dL
18-39 years: 400-1080 ng/dL
40-59 years: 350-890 ng/dL
60 years and older: 350-720 ng/dL

Tanner Stage IV:  165-854 ng/dL
Tanner Stage V:  194-783 ng/dL

Interpretive Data:
The concentration of free testosterone is derived from a mathematical expression based on the constant for the binding of testosterone to sex hormone binding globulin.



Note:
Please refer to individual components for stability of sample for this test.  This test is not recommended for females or children.   For testing on females or children refer to Testosterone, Free & Total, (Includes Sex Hormone Binding Globulin), Females and Children (0081056).

CPT Code(s):
84403 Total testosterone, 84270 SHBG

 

 

 
All ARUP Sites:        www.aruplab.com     ·     www.arupconsult.com     ·     www.arup.utah.edu     ·     www.childx.org     ·     www.utahblood.org