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. Author manuscript; available in PMC: 2019 Dec 1.

Published in final edited form as: Metabolism. 2018 Sep 15;89:1–7. doi: 10.1016/j.metabol.2018.09.003

Table:

Summary of 25OHD Levels Obtained in Elderly RCT using LC-MS/MS and Diasorin Liaison 25OHD Assays

	Test	N	Mean ± SD	Median	Minimum	Maximum	p-value
Baseline	AUB (Diasorin Liaison) (ng/ml)	219	18.5 ± 7.8	16.6	4	45.9	<0.0001
	Mayo (LC-MS/MS) (ng/ml)	219	20.5 ± 7.6	19	6	45	<0.0001
	Difference (ng/ml)^*	219	2 ± 6.2	1.7	−30.9	19.2
	Difference (%)^‡	219	6.9 ± 29.3	10	−206	61.9
6 months	AUB (Diasorin Liaison) (ng/ml)	171	28.1 ± 9.9	26.8	8.6	61	<0.0001
	Mayo (LC-MS/MS) (ng/ml)	171	30.4 ± 10	29	11	68	<0.0001
	Difference (ng/ml)^*	171	2.3 ± 7.4	2.7	−17.5	28.4
	Difference (%)^‡	171	5.8 ± 23.2	10	−76.1	67
12 months	AUB (Diasorin Liaison) (ng/ml)	126	28.5 ± 9.5	26.5	9.7	54.2	0.001
	Mayo (LC-MS/MS) (ng/ml)	126	30.9 ± 10.2	28	14	65	0.001
	Difference (ng/ml)^*	126	2.4 ± 7.6	2.7	−26.8	28.3
	Difference (%)^‡	126	5.1 ± 26.4	9.5	−167.5	60.9
All	AUB (Diasorin Liaison) (ng/ml)	516	24.1 ± 10.2	23.3	4	61	<0.0001
	Mayo (LC-MS/MS) (ng/ml)	516	26.3 ± 10.4	25	6	68	<0.0001
	Difference (ng/ml)^*	516	2.2 ± 6.9	2.2	−30.9	28.4
	Difference (%)^‡	516	6.1 ± 26.7	9.8	−206	67

^*

Difference= 25OHD (LC-MS/MS) - (Diasorin Liaison)

^‡

%Difference= (LC-MS/MS -Diasorin Liaison)/ LC-MS/MS *100