paeds474
The positive likelihood ratio for a diagnostic test is 3. A patient, whose pre-test odds were 2 tests positive.The following is most accurate:
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paeds473
A study done on a group of epileptics records the numbers of seizures in the weeks before and after a dietary intervention. The decrease in seizures is on average 20. (95% CI=15 to 25; P=0.0024)Which of the following options is true?
paeds472
One of the main disadvantages of case control studies is:
paeds470
What is the best study design to use when trying to determine a causal relationship between a certain factor and the onset of a rare disease?
paeds471
This equation links lung function measurement to height: Lung function = 2.3 + (1.5 x height), R = 0.75Which of the following statements is true?
paeds465
The following best describes non parametric tests:
paeds466
Which of the following best describes odds ratios?
paeds467
Out of 30 children who are exposed to a chemical, 15 develop a disorder, compared to only 1 child out of 10 developing the same disorder who were not exposed.The following can be deduced from this information:
paeds469
The following is true of power calculations for comparison of a numerical measurement between the two groups:
paeds468
In a new drug trial, 1 out of 27 individuals who were given the treatment experienced a side effect, compared to 0 out of the 25 patients given the placebo. Which of the following is true?