The present study shows 45 cases with benign FNAC, concordance in 41 cases (True Negative) and discordance in four cases (False Negative
) turnout as papillary carcinoma and 30 case with malignant FNAC, concordance in 28 cases (True Positive) two cases turnout as nodular colloid goiter with cystic degeneration (False positive).
(13) SNACC (12) researchers also found that those enrolled in Medicaid when surveyed are less likely to report false negatives
However, recently conducted multi-institutional studies have reported false negative
rates for SLN biopsy ranging from 5.5% to 16.7%4-7 which are higher than the target of <5% set in the 2005 guidelines of American society of clinical oncology2.
They had compared malaria tests results using RDTs with that using a microscope, the gold standard for malaria diagnosis, and found it actually gave false negative
* Verification in the second stage using the sophisticated human ventricular cardiac organoid chamber (hvCOC, or "human heart-in-a-jar"), an exclusive Novoheart technology whose three-dimensional architecture and best-in-class physiological readouts allow highly sensitive detection to avoid false negatives
As a result, EBUS-TBNA was false negative
in 8 of 31 (25.8%) lung cancer patients.
Monitoring the ion ratios will provide improved confidence in reporting analyte concentrations, avoiding false positives and false negatives
, which have been reported in the literature .
Mogayzel Jr., "False negative
cystic fibrosis newborn screen," Clinical Pediatrics, vol.
A false negative
may occur when the drug is present in the sample but the detection limit of the method is too high, or when the actual concentration of the drug in the sample is very low.
In our study when it predicted good tubal patency, only one case of tubal occlusion was diagnosed by laparoscopy with chromopertubation (False positive rate= 11.11, PPV= 96.97%, likelihood ratio if test positive= 8.73], However, when the test showed nine cases of tubal occlusion, one case had tubal patency by laparoscopy with chromopertubation (False negative
rate= 3.03, NPV= 88.89%, likelihood ratio if test negative= 0.03].
Table 2: False Positive and False Negative
Results on ICT in this Study.
In the medical sciences, there are many measures used to calculate indices related to diagnostic accuracy are: sensitivity, specificity, false negative
rate, false positive rate, overall accuracy, PPV, NPV, LR+, and LR-.