However, when we compared the means (SD) of the lowest results for each duplicate measurement
between the tests with and without the predilution step [no predilution, 388 (144) U/L; with predilution, 326 (111) U/L; n = 208], the lower values for the test with the predilution step were striking (Fig.
Specimens were then stored at room temperature for 5 h, followed by storage up to 48 h at 4 [degrees]C to measure NT-proBNP concentrations at 24 and 48 h (duplicate measurement
of each specimen).
The measurements were performed as a single measurement, except on day 0 (duplicate measurements
3 Paired difference 0.15 [+ or -] 0.16 0.18 [+ or -] 0.21 Table 2: SUV and SUL: CV and ICC from duplicate measurements
superior to, inferior to, and at the level of the portal vein and in the left lobe of the liver.
from the same sample were carried out.
No statistical difference was observed in bias of the duplicate measurements
at the two VCT sites.
The assay utilizes a polyclonal antibody sandwich assay to detect mouse sclerostin and requires 25 [micro]l of sample (serum or plasma) for duplicate measurements
. The lower level of detection of the assay is 17.4 pg/mL with a calibrated range of 37.5-1200 pg/mL.
The duplicate measurements
, along with the preceding study, confirm that this variability is a true artefact of the material and indicate chip-to-chip molecular weight variation within the batch.
Initially, Levey and Jennings averaged duplicate measurements
of their control to set the mean and range.
The research team obtained duplicate measurements
one to two weeks apart from 33 study participants to make sure the results could be replicated over time.
Precision or variability of measurements conducted under identical conditions can be obtained by duplicate measurements
(a) Duplicate measurements
were made in 21 samples for PBDEs, and in 16 samples for PCBs.