(Single Best Answer) Question 171: 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 172: 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 175: 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):
A) It is a definitive host in malaria B) It is a definitive host in filaria C) Its life cycle is completed in 3 weeks D) The female can travel upto 3 kilometers Answer (Select an option above to get the answer):
A) India has eradicated this disease B) Niridazole prevents transmission of the disease C) The disease is limited to tropical and subtropical regions D) No animal reservoir has been proved Answer (Select an option above to get the answer):
(Single Best Answer) Question 180: To test the association between risk factor and disease, which of the following is the weakest study design ?
A) Case - control study B) Ecological study C) Cohort study D) Cross - sectional study Answer (Select an option above to get the answer):