Epidemiology Chapter 7, 8, and 9
2024/2025 Exam Questions and
Corresponding Answers with Surety of
100% Pass Mark
Cohort study - 🧠ANSWER ✔✔in this study the investigator selects a group of
exposed individuals and a group of non exposed individuals and follows up both
groups to compare the incidence of disease in the 2 groups
historical controls - 🧠ANSWER ✔✔using a comparison group from the past,
using their medical records, for a therapy we want to test today. For
comparison, we will go back to the records of pt's with the same disease who
were treated before the new therapy became available.
what do we hope to accomplish with randomization? - 🧠ANSWER
✔✔nonpredicktibility of the next assignment; we do not have to worry that any
subjective biases of the investigators, either overt or covert, may be introduced
into the process of selecting patients for one treatment group or the other. Also,
if the study is large enough and there are enough participants, we hope that
randomization will increase the likelihood that the groups will be comparable to
Page 1 of 3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
2024/2025 Exam Questions and
Corresponding Answers with Surety of
100% Pass Mark
Cohort study - 🧠ANSWER ✔✔in this study the investigator selects a group of
exposed individuals and a group of non exposed individuals and follows up both
groups to compare the incidence of disease in the 2 groups
historical controls - 🧠ANSWER ✔✔using a comparison group from the past,
using their medical records, for a therapy we want to test today. For
comparison, we will go back to the records of pt's with the same disease who
were treated before the new therapy became available.
what do we hope to accomplish with randomization? - 🧠ANSWER
✔✔nonpredicktibility of the next assignment; we do not have to worry that any
subjective biases of the investigators, either overt or covert, may be introduced
into the process of selecting patients for one treatment group or the other. Also,
if the study is large enough and there are enough participants, we hope that
randomization will increase the likelihood that the groups will be comparable to
Page 1 of 3
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER:
619652435. TERMS OF USE. PRIVACY STATEMENT. ALL RIGHTS RESERVED
