Comment on the Positive Predictive Value
نویسندگان
چکیده
منابع مشابه
The first positive: computing positive predictive value at the extremes.
Computing the positive predictive value (PPV) of a wellknown test for a relatively common disease is a straight-forward exercise. However, in the case of a new test for a rare disorder; the extreme numbers involved-the very low prevalence of the disorder and the lack of previous false-positive results--make it difficult to compute the PPV. As new genetic tests become available in the next decad...
متن کاملMistake in Calculating the Positive Predictive Value
As I read the study by Bakhtiari et al. (1), I noticed that they miscalculated the positive predictive value. They indicated that the positive predictive value of the PCR assay was 100%. But when I placed the values on the table and calculated the positive predictive value of the PCR assay, I found it 83.3%.
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background: tins research was conduced to estimate the positive predictive value of physicians at kerman emergency services for traumatic patients who referred to radiology department of kerman hospital in 2001. methods: this study was a cross-sectional study and carried out on 353 patients. a questionnaire was used as a research instrument. results: three radiologists reported the films separa...
متن کاملImproving the positive predictive value of exercise testing in women.
OBJECTIVE To identify exercise test variables that can improve the positive predictive value of exercise testing in women. DESIGN Cohort study. SETTING Regional cardiothoracic centre. SUBJECTS 1286 women and 1801 men referred by primary care physicians to a rapid access chest pain clinic, of whom 160 women and 406 men had ST depression of at least 1 mm during exercise testing. The results...
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Diabetes mellitus (DM) is an important public health challenge [1 ].Different studies predicted that the frequency of diabetic patients will be increased to 642 million throughout the world by 2040 [2]. A notable percentage of diabetic patients are not aware of their disease (approximately 30% in Iran) [3]. Lag in the diagnosis of DM raises the expense of controlling disease and makes the progn...
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ژورنال
عنوان ژورنال: Deutsches Aerzteblatt Online
سال: 2011
ISSN: 1866-0452
DOI: 10.3238/arztebl.2011.0284a