How is the Positive Likelihood Ratio calculated?
How is the Negative Likelihood Ratio calculated?
The results of a study undertaken to determine the utility of urinary leukocyte dipstick testing in the diagnosis of urinary tract infections (UTI) in febrile children is shown below.
￼￼￼￼￼￼￼￼￼￼￼￼￼￼￼￼￼￼￼￼￼￼￼￼In this study, the negative predictive value of the leukocyte dipstick test is:
What is infant mortality rate?
Number of deaths <12 months age per 1000 live births.
(absolute risk reduction)
ARR = CER-EER
CER = events in control group/total control group
EER = events in experiment group/total
EER= Experiment event rate
(Events experiments grp/total experiment group)
CER = Control event rate
(Events control group/total control group)