Around 20% of people with mild TSH elevations who have ultrasound evidence of occult thyroid dysfunction will have no thyroid antibodies detected, suggesting that the upper limit of the reference range
in NHANES III is inflated by this subgroup, said Carole Spencer, Ph.
The purpose of this study was to reevaluate immunoglobulin levels collected over several investigations by using a consistent approach to data analysis to determine whether individuals who live near several Superfund sites are more likely to have test results below or above the reference range
than individuals who live in comparison areas with no Superfund site.
The reference range
of selected multiples of estimated revenue for calendar year 2009 were chosen based on multiples of software companies with operating metrics that are similar to Vignette's, including, but not limited to, revenue growth, profit margins, and relative profitability.
In developing these reference ranges
, Ingenuity Health is building a database for comparing a patient's urine drug test results with those of a group of patients clinically assessed as adherent and taking the same medication.
For LDTs or modified FDA-cleared/approved tests it is PARR+AS+AS (precision, accuracy, reportable range, reference range
, analytic sensitivity, and analytic specificity).
We used data from a study on the prevalence of HIV infection among health care workers in South Africa,1 to evaluate and revalidate the current automated full blood count reference ranges
for the Gauteng region.
Here we limit our discussion to Pb exposure, although many of the issues for Pb, such as preanalytical concerns for contamination control, sampling, and reference ranges
, also apply to other metals.
The reference range
of unprovoked urine is less than 60 mcg/g creatinine, a considerable difference.
5x wider external reference range
of 1 V to 5 V, compared to the competition.
Because this total data set contained samples from patients with abnormal WBC counts, we eliminated samples that fell outside age-dependent WBC reference ranges
to generate a reference range
data set comprising 2443 samples (Table 1).
Initially, vitamin D insufficiency was defined as a 25-OHD level of less than 20 ng/mL, based on the lab's reference range
and data from a study suggesting that 20 ng/mL represents the cutoff below which the risk for secondary hyperparathyroidism rises.
(*) CD3 71% 5,065 2,280-6,450 CD4 39% 2,782 1,690-4,600 CD8 31% 2,212 720-2,490 CD56 4% 285 319-935 (+) CD19 18% 1,284 500-1,500 (*)Reference ranges
(except for CD56).