A) Position B) Pain and Temperature C) Vibration D) Touch Answer (Select an option above to get the answer):
(Single Best Answer) Question 63: In a group of patients presenting to a hospital emergency with abdominal pain, 30% of patients have acute appendicitis, 70% of patients with appendicitis have a temperature greater than 37.5Â°C and 40% of patients without appendicitis have a temperature greater than 37.5Â°C. Considering these findings, which of the following statements is correct ?
A) The sensitivity of temperature greater than 37.5Â°C as a marker for appendicitis is 21/49 B) The specificity of temperature greater than 37.5Â°C as a marker for appendicitis is 42/70 C) The positive predictive value of temperature greater than 37.5Â°C as marker for appendicitis is 21/30 D) The specificity of the test will depend upon the prevalence of appendicitis in the population to which it is applied Answer (Select an option above to get the answer):
(Single Best Answer) Question 64: The number of malaria cases reported during the last 10 years in a town are given below: 250,320,190,300,5000,100,260,350,320& 160. The epidemiologist wants to find out the average number of malaria cases reported in that town during the last 10 years. The most appropriate measure of average for this data will be ?
A) Arithmetic mean B) Mode C) Median D) Geometric mean Answer (Select an option above to get the answer):
(Single Best Answer) Question 65: A Cardiologist wants to study the effect of an anti-hypertensive drug. He notes down the initial systolic blood pressure (mmHg) of 50 patients and then administers the drug on them. After a weekâ??s treatment, he measures the systolic blood pressure again. Which of the following is the most appropriate statistical test of significance to test the statistical significance of the change in blood pressure ?
A) Paired t - test B) Unpaired or independent t - test C) Analysis of Variance D) Chi-square test Answer (Select an option above to get the answer):
(Single Best Answer) Question 66: In assessing the association between maternal nutritional status and the birth weight of the newborns, two investigators A and B studied separately and found significant results with p values 0.02 and 0.04 respectively. From this information, what can you infer about the magnitudes of association found by the two investigators ?
A) The magnitude of association found by Investigator A is more than that found by B B) The magnitude of association found by Investigator B is more than that found by A C) The estimates of association obtained by A and B will be equal, since both are significant D) Nothing can be concluded as the information given is inadequate Answer (Select an option above to get the answer):
A) 1 B) 5 C) 6 D) 12 Answer (Select an option above to get the answer):
(Single Best Answer) Question 69: A total 5000 patients of glaucoma are identified and surveyed by patient interviews regarding family history of glaucoma. Such a study design is called ?
A) Case series report B) Case-control study C) Clinical Trial D) Cohort study Answer (Select an option above to get the answer):
A) It is synonymous with isolation B) Absolute quarantine is restriction during the incubation period C) Excusion of children from schools is an example of modified quarantine D) Quarantine should not be longer than the longest incubation period Answer (Select an option above to get the answer):