A score of 4 or more on the 7-point [ABCD.sup.2] system, which is a validated clinical risk scoring system based on patient age, blood pressure, clinical features, duration of symptoms, and diabetes status--all of which have been linked with post-TIA stroke risk--had a positive predictive value
for subsequent stroke of 5%.
In the absence of pneumonia, history of travel to a previously SARS-affected area is likely to have an extremely low positive predictive value
for detecting SARS among patients with respiratory illness and, if used as a screening tool, would likely result in an unacceptable burden on the public health system.
These six had all shown multiple antibodies at the baseline screening, indicating a 100% sensitivity and 50% positive predictive value
for multiple antibody testing.
The positive predictive value
of a finding indicates how often a patient will actually have the infection in question if the finding is present.
In this study, ill-defined margin had a high positive predictive value
for malignancy [71% for irregular & 83% for spiculated margin] which is well correlating with the study by Nunes et al.
Hysteroscopy for the diagnosis of endometrial cancer was associated with 94% sensitivity 98% specificity a 73% positive predictive value
, and a 99.6% negative predictive value.
Family structure's positive predictive value
of 18% and negative predictive value of 91% were superior to the commonly used models for estimating the probability that a woman has a BRCA mutation, Dr.
Per manufacturer's specifications, the sensitivity, specificity, positive predictive value
, and negative predictive value of this kit are 96%, 97%, 90%, and 99%, respectively).
But, those models have little positive predictive value
, meaning that too many patients who actually do nor have a serious bacterial infection get classified as high-risk and get hospitalized unnecessarily
(Table IV) Sensitivity of the test is 90.4%, Specificity of test is 81.25%, Positive Predictive value
is 96.20%, Negative predictive value is 61.9%, Disease prevalence 84% and Negative Appendectomy rate 3.79% respectively (Table V).
Its limitations include a poor positive predictive value
; false-positivity in women who have recently had a vaginal exam or intercourse; cost; and, usually, the need for a laboratory for analysis.
The new test also had a positive predictive value
of 99.3% and a negative predictive value of 99.2% in the validation studies.