Reference Intervals of Total Testosterone in Adult Filipino Men

Table 3

Reference ranges for total testosterone in young adult males across different ethnic groups.

Study author	Race	Assay	N	95% range (nmol/l)
Population-based
Friedrich	White	CLEIA^a	416	10.4–32.3
2008 (20)	(Germany)
Travison	White	LC-MS^b	400	9.16–31.78
2017 (24)	(US and Europe)
Shen	East Asian	CLEIA	227	13.61–19.28
2013 (26)	(China)
Iwamoto	East Asian	RIA	1172	6.96–26.00
2004 (27)	(Japan)
Healthy volunteers
Shatzl	White	CLEIA	133	10.4–28.8
2003 (21)	(Austria)
Boyce	White	RIA^c	199	10.04–38.76
2004 (22)	(UK)
Elmlinger	White	CLEIA	446	8.7–29.6
2005, (23)	(Germany)
Neale	White	LC-MS	67	10.6–31.9
2013 (24)	(Wales)

^aChemiluminescence enzyme immunoassay; ^bliquid chromatography-mass spectrometry; ^cradioimmunoassay.