Download JIPMER Potential Topics
Dr. V. Murugan
MURUGAN - SPM THE SURE SHOT
Crohnbach's Alpha
? used to estimate reliability or internal
consistency of a questionnaire
? Values ranges- 0-1
MURUGAN - SPM THE SURE SHOT
Kappa statistics
? Used to measure the inter observer
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
MURUGAN - SPM THE SURE SHOT
Likelihood ratio (LR)
? measures diagnostic accuracy
? Positive LR sensitivity
1- specificity
? Negative LR 1- sensitivity
specificity
MURUGAN - SPM THE SURE SHOT
Receiver operating characteristic
(ROC) curve
? Graphical display of validity of test
? Plotted between sensitivity and 1- specificity
? Maximum area under the curve is 1
MURUGAN - SPM THE SURE SHOT
Bland Altman analysis
? Graphical method to compare two
quantitative measurement techniques
? Plotted between mean of two measures and
difference between two measures
?
MURUGAN - SPM THE SURE SHOT
Serial testing of screening test
? One test first if positive followed by second
test
? Decrease in sensitivity and increase in
specificity
MURUGAN - SPM THE SURE SHOT
Parallel testing of screening test
? Increase in sensitivity and decrease in
specificity
MURUGAN - SPM THE SURE SHOT
Nested case control study
? It is a prospective study
MURUGAN - SPM THE SURE SHOT
Number needed to treat in RCT
? It is number of patients needed to be treated
to prevent one bad outcome
MURUGAN - SPM THE SURE SHOT
Forrest plot in meta analysis
MURUGAN - SPM THE SURE SHOT
Correlation coefficient (r)
? Strength and direction of relationship
between 2 variables
? r= -1 to +1
MURUGAN - SPM THE SURE SHOT
Type 1 and type 2 error
MURUGAN - SPM THE SURE SHOT
Kolmorgov smirnov test
? Used to check the normal distribution of the
test
MURUGAN - SPM THE SURE SHOT
Likert scale (ordinal data)
MURUGAN - SPM THE SURE SHOT
This post was last modified on 31 July 2021