antibody assays may occur with great frequency, emphasizing the need for reflex' HCV RNA testing to ascertain current infection status," the investigators wrote.
Third, without the step of verification, some of the extracted signatures may be false-positive
Second, with substantially more linkages than previous research, we use linked 2011 CPS ASEC and 2010 MSIS data to evaluate two components of measurement error affecting the undercount: false-negative error and false-positive
error (Figure S1).
Overall, the T2Lyme Panel has been evaluated against 558 negative samples with no false-positive
Some non-malignant conditions of the larynx, such as vocal cord paralysis (3) and Teflon granuloma (4), have been reported to cause false-positive
fluorodeoxyglucose (FDG) uptake on PET/CT.
Evaluation showed one true-positive (total anomalous pulmonary venous return), 33 false-positives
-- of which 31.3 percent had significant non-CCHD disease -- and six false-negatives, yielding an overall specificity of 99.96 percent, a sensitivity of 14.3 percent, and a false-positive
rate of 0.043 percent.
Mammograms were considered false-positive
exams if there was no known tissue diagnosis of breast cancer within one year after the recommendation for tissue diagnosis or surgical consultation on the basis of a positive exam.
Such cases are described as "instrument false-positive
" and have been attributed to background C[O.sub.2] production, possibly by white blood cells (WBC) .
A TEST USED TO DETECT ZIKA virus is producing a larger-than-expected number of false-positive
results, according to a safety alert issued by the Food and Drug Administration.
Most recently, Francois Fressin (Harvard University) and colleagues calculated a 20% false-positive
rate for giant planets.
Ellingrod's article, "Urine drug screens: When might a test be false-positive
?" (Savvy Psychopharmacology, CURRENT PSYCHIATRY.
Also known as cell-free DNA (cfDNA) testing, NIPT has demonstrated better accuracy than conventional first-trimester screening and serum tests for the detection of fetal trisomies--aneuploidies that involve an extra chromosome--and its low false-positive
rate in particular has reduced the need for more invasive, higher-risk diagnostic procedures, such as amniocentesis and chorionic villus sampling (CVS).