positive cutoff

positive cutoff

A cutoff, 2 which extends downward to an impervious lower boundary, completely blocking the path of subsurface seepage.
References in periodicals archive ?
First, although an ARR [greater than or equal to] 3.7 was used as the positive cutoff in the screening protocol, many patients who tested negative also underwent the confirmatory tests, which avoided overestimating the accuracy of the ARR.
Kaplan et al, (11) 10% positive cutoff. 2005 2-[micro]m sections.
tularensis antigens were detected by use of ELISA (Virion-Serion, Wurzburg, Germany) in serum obtained 2 months after the onset of symptoms in concentrations of 147.13 and 222.74 U/mL, respectively (positive cutoff >15 U/mL).
For individuals with HIV or any other underlying disease condition, such as malignancy, the positive cutoff threshold drops to 5-9 mm.
The SAMHSA positive cutoff values for urine drugs-of-abuse testing are also given in Table 1.
"A false positive cutoff of 5% still gave us a detection rate of 79%, and at a 1% false-positive rate we still maintained a 64% detection rate for trisomy 21," said Dr.
Snuffback at the end of the dispense cycle can ensure a clean, positive cutoff. The unit's low-maintenance design features an efficient fluid path to prevent paste from clogging inside the valve.
A high-speed, positive cutoff, surface-type contact winder was introduced by Kuhne GmbH (represented by O/K International, Wayland, Mass.).
It also requires frequent and dynamic reassessment of positive cutoff values.
Using RT-PCR to test for HCV RNA, we examined 58 samples from children: all 27 samples with antibody-positive results, 11 with high-negative (near the positive cutoff) results, 10 with negative results from children with a history of frequent transfusions, and 10 with low-negative results from children with no history of transfusion.
The proportion of positive Leptospira microscopic agglutination tests for 23,005 dogs significantly increased from 2002 to 2004 (p<0.002) regardless of the positive cutoff titer used and was highest (p<0.05) for serovars Autumnalis and Grippotyphosa.
The positive cutoff value for the Access IFAB Assay was determined by ROC analysis of 499 samples across a IFAB concentration range of 0.93-12.25 AU/mL, with the results of the DPC RIA used as the comparison method.