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A study of 6,750 people free of disease X were enrolled in a study in 1986...

A study of 6,750 people free of disease X were enrolled in a study in 1986 and followed with annual exams and interviews through 1987. Exposure to Factor A was determined at a study enrollment and the participants were followed until 1987 to observe new cases of disease X. Data from the study are given below.

Disease

No Disease

Exposure to Factor A

120

2880

Not Exposed to Factor A

30

3720

1. What type of study is this?

A. Cross-Sectional

B. Case-Control

C. Cohort

D. Completely Randomized Trail

2. Is this an experiment or an observation?

3. Calculate the measure for the effect of exposure to factor A on disease X?

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Answer #1

Answer- 1. Cross-Jectional 2. 1t is an ohservahon 3. Calcuation for measure for tha effeet of exposure to bat0γ A on disease X Informabon iven h-lPeople who were exposed tsipm A and /has dlisease 120 donot have disease 2880 had duease3 and also did not have cliseae 3720 formula-RRニA1CAtB) . 120/(120 288 120 3000o1 8 Pesple toho were exposed to lactor A and C- People who were not exposed to lactor A and 30, с 30 + 3720) -30/ 3750 30/ C 30 + 3729) 0008 The measure tor he eklect of exposure b actor A on diseme X is 5

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