Table 3.

Variations among ICS used for the analysis of SSd.

Sample	RSD %
SSd (ng/mL)	1 Day a	4 Weeks b	8 Weeks c
125	2.41	3.11	3.51
250	2.52	4.00	3.52
500	2.44	3.00	5.20
1000	3.12	2.71	4.50

^a The values indicate coefficients of variance for triplicate samples on three different strips used one day after manufacture; ^b The values indicate coefficients of variance for triplicate samples on three different strips used after being stored for four weeks; ^c The values indicate coefficients of variance for triplicate samples on three different strips used after being stored for eight weeks.