Controls are need in case-control study because

Reference no: EM13264285

Controls are need in a case-control study because:

a. They are matched to the cases for the suspected etiolgoci factor under study.

b. They may be followed to determine if they develop the disease in question.

c. The increase the sample size so that statistical signifcance may be acieved.

d. The allow evalution of whether or not the frequency of exposure among cases is different from that among comparable person without the disease.

e. They do not have the exposure under study and thus allow evaluation fo whether the frequency of the disease differs among those who are or are not exposed.

Reference no: EM13264285

Questions Cloud

Recruitment from strategic standpoint : If you were an HR director in a mid-sized organization how would you approach recruitment from strategic standpoint?

Astronomy was important to people in ancient times : Why do you think Astronomy was important to people in ancient times? How do those beliefs affect us today?

Calculate the free falling velocity : A particle with a mass of 1 g is stationary at a height of 500 m relative to a reference surface .Neglecting friction and buoyance forces. Calculate the free falling velocity that the particle would have at a height of 200 m. Calculate the velocity t..

What is the pressure of the resulting steam : What is the pressure of the resulting steam? How much heat must be added to produce such steam flow, expressed in kJ/h?

Controls are need in case-control study because : Controls are need in a case-control study because:

Decision making process-cardiovascular service : What would you want to know about this study to guide your decision making process? Outline steps you would take to trial this process on your unit

The best measure of the strength of association : The best measure(s) of the strength of association is (are):

Effective b2b e-commerce strategy help organization maximize : Explain how an effective B2B e-commerce strategy helps an organization maximize its potential.

Estimate the rate of heat loss by breathing : Consider a cold winter day with an air temperature of 5 degrees C and relative humidity of 20% (moisture content .001g H2O/ g dry air). A person waiting at a bus stop inhales at an average rate of 7g dry air /minute and exhales air saturated with wat..

User Account

All Pages