Stats/miscellaneous

Question 1

what type of study gives you odds ratio?

Answer 1

case control (cases go to OR)

Question 2

what type of study gives you relative risk

Answer 2

cohort study

Question 3

FDA phases of research

Answer 3

1 - “first in man” to determine safety. 2 - determine if device/drug is effective (most fail here). 3 - large scale trials. 4 - postmarketing surveillance

Question 4

level of evidence of cohort study

Answer 4

level 2

Question 5

level of evidence of case-control study

Answer 5

level 3

Question 6

level of evidence of case series and cross-sectional studies

Answer 6

level 4

Question 7

difference between cohort and case-control

Answer 7

cohort - prospective, Level 2, RR. case-control - retrospective, Level 3, OR

Question 8

most common cause of article retraction

Answer 8

plagiarism

Question 9

what does funnel plot look for

Answer 9

bias in results of meta-analysis (asymmetry = bias)

Question 10

what does it mean if the RR confidence interval crosses 1

Answer 10

result isn’t significant

Question 11

statistical test for categorical data

Answer 11

chi-squared unless small groups then fisher’s exact

Question 12

statistical test for normally distributed continuous data

Answer 12

t-test for two groups, ANOVA for 3 or more groups

Question 13

most likely statistical test for non-normally distributed continuous data

Answer 13

Mann-Whitney U test