6- In a trial of a new drug, 13/28 treated improved over a one month period, compared with 3/28 on placebo. For Chi2 testing which of the following is correct?
1) The figures should first be converted to percentages.
2) The results would almost certainly suggest that more cases were needed to obtain a significant result.
3) There is one degree of freedom.
4) A value of Chi2 of 4.6 would imply that the result would have been obtained by chance in 46/100 trials.
5) The results would be invalidated if a disproportionate number of cases treated with the new drug had developed side effects.
Answers-3
7- Adequate randomisation can be assumed in which of the following circumstances?
1) All consecutive patients attending a tertiary referral centre.
2) A sample using healthy volunteers.
3) A sample of those judged to be appropriate for inclusion in the study.
4) A sample based on a family cluster.
5) A stratified random sample.
Answers-5
8- An experienced group of surgeons report on a randomised placebocontrolled trial comparing a particular carotid surgery technique as compared to a sham operation. Their study concludes that 'using this advanced surgical technique reduces the risk of stroke from 4.3% to 3.8% (p<0.05)'.
What has this study proved about the surgical procedure?
1) Acceptability
2) Effectiveness
3) Efficacy
4) Safety
5) Usefulness
Answers-3
9- A randomised double-blind placebo controlled study of a cholesterollowering drug for the primary prevention of coronary heart disease was conducted. It had a five-year follow up period.
The results showed an absolute risk of myocardial infarction in the group-receiving placebo during was 10 per cent. The relative risk of those given the cholesterol lowering medication was 0.8 What number of patients will need to be treated with the drug for five years to prevent one myocardial infarction?
1) 20
2) 40
3) 50
4) 80
5) 100
Answers-3
10 -Which of the following statements is true regarding statistical interpretation of data?
1) The incidence equals the number of newly affected individuals divided by the number of people at risk for the disease for a given duration.
2) The prevalence is readily distinguished from the incidence in relation to cancers.
3) The mortality rate is a kind of cumulative prevalence rate.
4) The cumulative incidence rate is usually given over a 10 year period.
5) The prevalence rate is defined as the total number of cases divided by the total number in the population.
Answers-1
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1) The figures should first be converted to percentages.
2) The results would almost certainly suggest that more cases were needed to obtain a significant result.
3) There is one degree of freedom.
4) A value of Chi2 of 4.6 would imply that the result would have been obtained by chance in 46/100 trials.
5) The results would be invalidated if a disproportionate number of cases treated with the new drug had developed side effects.
Answers-3
7- Adequate randomisation can be assumed in which of the following circumstances?
1) All consecutive patients attending a tertiary referral centre.
2) A sample using healthy volunteers.
3) A sample of those judged to be appropriate for inclusion in the study.
4) A sample based on a family cluster.
5) A stratified random sample.
Answers-5
8- An experienced group of surgeons report on a randomised placebocontrolled trial comparing a particular carotid surgery technique as compared to a sham operation. Their study concludes that 'using this advanced surgical technique reduces the risk of stroke from 4.3% to 3.8% (p<0.05)'.
What has this study proved about the surgical procedure?
1) Acceptability
2) Effectiveness
3) Efficacy
4) Safety
5) Usefulness
Answers-3
9- A randomised double-blind placebo controlled study of a cholesterollowering drug for the primary prevention of coronary heart disease was conducted. It had a five-year follow up period.
The results showed an absolute risk of myocardial infarction in the group-receiving placebo during was 10 per cent. The relative risk of those given the cholesterol lowering medication was 0.8 What number of patients will need to be treated with the drug for five years to prevent one myocardial infarction?
1) 20
2) 40
3) 50
4) 80
5) 100
Answers-3
10 -Which of the following statements is true regarding statistical interpretation of data?
1) The incidence equals the number of newly affected individuals divided by the number of people at risk for the disease for a given duration.
2) The prevalence is readily distinguished from the incidence in relation to cancers.
3) The mortality rate is a kind of cumulative prevalence rate.
4) The cumulative incidence rate is usually given over a 10 year period.
5) The prevalence rate is defined as the total number of cases divided by the total number in the population.
Answers-1
More Questions & Answers:-
Page1 Page2 Page3 Page4 Page5
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