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 ?
For individuals with HIV or any other underlying disease condition, such as malignancy, the positive cutoff threshold drops to 5-9 mm.
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.
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.
002) regardless of the positive cutoff titer used and was highest (p<0.
The positive cutoff value for the Access IFAB Assay was determined by ROC analysis of 499 samples across a IFAB concentration range of 0.
All specimens were analyzed with a Hitachi 717 (BMC) automated chemistry analyzer, with a positive cutoff concentration of 200 [micro]g/L (nitrazepam).