specificity

(redirected from True negative)
Also found in: Dictionary, Thesaurus, Medical, Legal, Acronyms.
Related to True negative: False Negative Rate

specificity

[‚spes·ə′fis·əd·ē]
(chemistry)
The selective reactivity that occurs between substances, such as between an antigen and its corresponding antibody.
References in periodicals archive ?
09 Stay [+ or -] SD 3-6 3-6 Range (Days) True Negative RIPASA <7.
4%) of these 76 patients, ureteric calculus was not seen on CT scan, so they were True Negative and constituted 32.
Table 1: Reliability of HRUS as determined at Arthroscopy Medial Meniscus Lateral Meniscus PC L AC L True positive 62 15 6 138 True negative 111 164 183 10 False positive 10 6 0 10 False negative 6 4 0 1
Thus true positive patients were 12, false positive were 7, false negative were 15 and true negative were 16.
Specificity = True negative x 100/True negative + False positive
Out of these, 13 cases were true positives for malignancy, 3 cases were true negative and one case was false negative.
The cases in which the spleen size was normal and they do not have varices were called the true negative cases.
While, the sensitivity and specificity of each test was calculated using criteria of true negative and true positive responders as per Naureenet al.
A total of 6 criteria were used for the assessment of performance, including: true positive rate, false positive rate, true negative rate, false negative rate, accuracy, and preciseness.
Thus, clinicians and patients can be assured that a negative screen on the UF-1000i using defined thresholds for white blood cell counts and bacteria is likely to be a true negative.
Specificity, also called the true negative ratio, and accuracy is calculated by the formula TN
of FNAC 104 False Negative 5 False Positive 4 True Positive 80 True Negative 15 Sensitivity 94.