Download JIPMER Potential Topics

JIPMER Potential topics
Dr. V. Murugan
MURUGAN - SPM THE SURE SHOT

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Crohnbach's Alpha
? used to estimate reliability or internal

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consistency of a questionnaire
? Values ranges- 0-1
MURUGAN - SPM THE SURE SHOT

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Kappa statistics
? Used to measure the inter observer

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agreement(eg- X ray by two observers)
? Values >0.75- excellent agreement
? Values 0.4-0.75- intermediate to good
agreement
? <0.4- poor agreement

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MURUGAN - SPM THE SURE SHOT

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Likelihood ratio (LR)
? measures diagnostic accuracy
? Positive LR sensitivity
1- specificity

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? Negative LR 1- sensitivity
specificity
MURUGAN - SPM THE SURE SHOT

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Receiver operating characteristic
(ROC) curve

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? Graphical display of validity of test
? Plotted between sensitivity and 1- specificity
? Maximum area under the curve is 1
MURUGAN - SPM THE SURE SHOT

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Bland Altman analysis

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? Graphical method to compare two
quantitative measurement techniques
? Plotted between mean of two measures and
difference between two measures
?

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MURUGAN - SPM THE SURE SHOT

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Serial testing of screening test
? One test first if positive followed by second
test
? Decrease in sensitivity and increase in

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specificity
MURUGAN - SPM THE SURE SHOT

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Parallel testing of screening test
? Increase in sensitivity and decrease in
specificity

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MURUGAN - SPM THE SURE SHOT

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Nested case control study
? It is a prospective study
MURUGAN - SPM THE SURE SHOT

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Number needed to treat in RCT

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? It is number of patients needed to be treated
to prevent one bad outcome
MURUGAN - SPM THE SURE SHOT

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Forrest plot in meta analysis

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MURUGAN - SPM THE SURE SHOT

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Correlation coefficient (r)
? Strength and direction of relationship
between 2 variables
? r= -1 to +1

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MURUGAN - SPM THE SURE SHOT

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Type 1 and type 2 error
MURUGAN - SPM THE SURE SHOT

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Kolmorgov smirnov test
? Used to check the normal distribution of the

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test
MURUGAN - SPM THE SURE SHOT

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Likert scale (ordinal data)
MURUGAN - SPM THE SURE SHOT

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