![subject](/tpl/images/cats/biologiya.png)
Biology, 17.04.2020 02:50 torioricker
A case-control study was performed to determine whether head injury was associated with an increased risk of brain tumors in children. Two hundred (200) cases with brain cancer were identified from the state cancer registry, and 200 controls were recruited from the same neighborhoods where the cases lived. The mothers of the children completed a questionnaire that asked them to describe their child’s past history of head injury. The investigators found that the mothers of the children with brain tumors reported a past head injury for 70 of the cases while a past history of head injury was reported in 30 of the controls. What type of bias was likely to have influenced the findings of this study? (2)
a. Length bias
b. Recall bias
c. Surveillance, diagnostic, or referral bias
d. Interviewer/recorder bias
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Biology
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 10:30
Apopulation of rabbits live in a local forest. some had a mutation for a large body and long legs. the graph below shows the number of both the mutant and the normal rabbits over 5 generations. which of the following statements is true for this scenario? question 7 options: the rabbits with the mutation were more successful with restricted food than the normal rabbits. both sets of rabbits were equally successful with the restricted food source.i the normal rabbits were more successful with restricted food than the rabbits with the mutation. the graph does not let us know which rabbit was more successful.
Answers: 1
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 17:20
What is an example of a scientific question that galileo could not have answered with out this new tool?
Answers: 2
![question](/tpl/images/cats/biologiya.png)
You know the right answer?
A case-control study was performed to determine whether head injury was associated with an increased...
Questions
![question](/tpl/images/cats/en.png)
English, 04.08.2021 15:30
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
History, 04.08.2021 15:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 04.08.2021 15:30
![question](/tpl/images/cats/mat.png)
Mathematics, 04.08.2021 15:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 04.08.2021 15:30
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 04.08.2021 15:30
![question](/tpl/images/cats/en.png)
English, 04.08.2021 15:30
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/User.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 04.08.2021 15:30