Youden's Index and the Weight of Evidence

2015 ◽  
Vol 54 (02) ◽  
pp. 198-199 ◽  
Author(s):  
G. Hughes
Keyword(s):  
Likelihood Ratio ◽  
Diagnostic Tests ◽  
Positive Test ◽  
Weight Of Evidence ◽  
Probability Scale ◽  
Log Likelihood ◽  
Log Likelihood Ratio ◽  
Youden’S Index

SummaryBy means of Shannon’s relationship between information and probability, Youden’s index for rating diagnostic tests is shown to be a probability-scale analogue of the log-likelihood ratio of a positive test outcome.

Youden’s Index and the Weight of Evidence Revisited

2015 ◽  
Vol 54 (06) ◽  
pp. 576-577 ◽  
Author(s):  
G. Hughes
Keyword(s):  
Likelihood Ratio ◽  
Diagnostic Tests ◽  
Positive Test ◽  
Weight Of Evidence ◽  
Log Likelihood ◽  
Log Likelihood Ratio ◽  
Youden’S Index

SummaryA correspondence between Youden’s index for rating diagnostic tests and the log-likelihood ratio of a positive test outcome is illustrated by data calculated from two previously-published studies of binary tests.

scholarly journals Clusters of Toxoplasmosis in Ganghwa-gun, Cheorwon-gun, and Goseong-gun, Korea

2021 ◽  
Vol 59 (3) ◽  
pp. 251-256
Author(s):  
Jihye Yu ◽  
Woojin Kim ◽  
Yoon Kyung Chang ◽  
Tong-Soo Kim ◽  
Sung-Jong Hong ◽  
...  
Keyword(s):  
Relative Risk ◽  
Likelihood Ratio ◽  
Diagnostic Tests ◽  
Rapid Diagnostic Tests ◽  
Geographical Pattern ◽  
Scan Statistic ◽  
P Values ◽  
Log Likelihood ◽  
Log Likelihood Ratio

We find out the clusters with high toxoplasmosis risk to discuss the geographical pattern in Gyodong-myeon and Samsan-myeon of Ganghwa-gun, Cheorwon-gun, and Goseong-gun, Korea. Seroepidemiological data of toxoplasmosis surveyed using rapid diagnostic tests for the residents in the areas in 2019 were analyzed to detect clusters of the infection. The cluster was investigated using the SaTScan program which is based on Kulldorff’s scan statistic. The clusters were found with P-values in each region analyzed in the program, and the risk and patient incidence of specific areas can be examined by the values such as relative risk and log likelihood ratio. Jiseok-ri and Insa-ri were found to be a cluster in Gyodong-myeon and Seokmo-ri was the cluster in Samsan-myeon. Yangji-ri and Igil-ri were found to be a cluster in Cheorwon-gun and Madal-ri and Baebong-ri were the cluster in Goseong-gun. This findings can be used to monitor and prevent toxoplasmosis infections occurring in vulnerable areas.

Youden’s Index and the Likelihood Ratio Positive in Diagnostic Testing

2015 ◽  
Vol 54 (04) ◽  
pp. 382-383 ◽  
Author(s):  
D. Böhning
Keyword(s):  
Clinical Practice ◽  
Likelihood Ratio ◽  
Diagnostic Testing ◽  
Recent Letter ◽  
Letter To The Editor ◽  
Log Likelihood ◽  
Log Likelihood Ratio ◽  
Two Measures ◽  
Youden’S Index

SummaryWe refer to a recent letter to the editor by Hughes [1] and show that, despite existing similarities between Youden’s index and the log-likelihood ratio positive, important differences between these two measures remain to exist which can play an important difference in clinical practice.

scholarly journals A Corpus-Based Study on the Use of the Logical Connector ‘Thus’ in the Academic Writing of Turkish EFL Learners

2017 ◽  
Vol 10 (2) ◽  
pp. 64
Author(s):  
Serpil Ucar ◽  
Ceyhun Yukselir
Keyword(s):  
Likelihood Ratio ◽  
Academic Writing ◽  
Native Speakers ◽  
American English ◽  
Advanced Learners ◽  
Efl Learners ◽  
Log Likelihood ◽  
Log Likelihood Ratio ◽  
Effect Relation ◽  
Academic Genre

This research was conducted to investigate how frequently Turkish advanced learners of English use the logical connector ‘thus’ in their academic prose and to investigate whether it was overused, underused or misused semantically in comparison to English native speakers. The data were collected from three corpora; Corpus of Contemporary American English and 20 scientific articles of native speakers as control corpora, and 20 scientific articles of Turkish advanced EFL learners. The raw frequencies, frequencies per million words, frequencies per text and log-likelihood ratio were measured so as to compare varieties across the three corpora. The findings revealed that Turkish learners of English showed underuse in the use of the connector ‘thus’ in their academic prose compared to native speakers. Additionally, they did not demonstrate misuse in the use of the connector ‘thus’. Nevertheless, non-native learners of English tended to use this connector in a resultative role (cause-effect relation) more frequently whereas native speakers used it in appositional and summative roles more as well as its resultative role. Furthermore, the most frequent occurrences of ‘thus’ have been in academic genre.

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