Table 2.

The effects of assay method and DLMO calculation method on the DLMO for 20–29-year-old healthy participants from the literature

	RIA	ELISA	Mass Spec	Threshold	2 Std Dev	% of Peak	Other
DLMO	21.66 ± 0.73 h	21.54 ± 0.71 h	20.93 ± 0.38 h	21.53 ± 0.65 h	21.63 ± 0.88 h	21.88 ± 0.56 h	20.93 ± 0.61 h
# Studies	44	15	4	36	14	10	4
n	1281	425	104	1060	479	225	158

The data are the weighted means ± 1 SD for controls aged 20–29y. # studies indicate the number of publications used to generate the data. n = the total number of participants used in the publications.