Hi, please provide a detailed explanation (answer)... 1. I need to know what kin
ID: 3177635 • Letter: H
Question
Hi, please provide a detailed explanation (answer)...
1. I need to know what kind of study design this study would be considered? for example cross-sectional? ecological? and so on....
2. I need to know the exposure under study?
3. I need to know the outcome under study?
Data Interpretation and Confounding
Epidoria Birth Weight Study
Background – In the small island nation of Epidoria, a team of reproductive epidemiologists has been studying the relationship between very low birth weight and risk of cognitive, motor, and behavioral problems. Five years ago these investigators initiated a study. Using birth certificate files and delivery room entry logs, these investigators attempted to identify all full-term births in Epidoria over a 6-month period. The investigators enrolled all low birth weight babies and a representative sample of normal birth weight babies into their study. The investigators then examined the children every year until age 3 years. During the last examination, the investigators administered a standardized developmental screening test to assess personal-social, language, and motor-adaptive skills. Based on this test, the investigators classified the children into two groups: normal development and delayed development.
The results from the study were:
Development
Delayed
Normal
Total
Birth Weight
Low
140
220
360
Normal
77
283
360
Total
217
503
720
1) What kind of a study is this?
2) What is the exposure under study?
3) What is the outcome under study?
Please provide an ansswer at your earliest conveinence as I need to hand in before 4:30pm Central Standard Time.
Many thanks !!!!!!!!
Development
Delayed
Normal
Total
Birth Weight
Low
140
220
360
Normal
77
283
360
Total
217
503
720
Explanation / Answer
1)what kind of study is this ? A prospective study is a study that is planned and designed by the investigators.The subjects are recruited and are followed over a period of time to observe for the outcomes in future. In this case the investigators identified and recruited all low birth weight babies and a sample of normal birth weight babies. These subjects where then followed for next 3 years to assess their personal, social language and motor adaptive skills based on which they were classified as having Delayed development or Normal development. Thus this case is that of a prospective study.
2) What is the exposure under study? Since the investigators are assesing the risk of delayed development in subjects having low birth weight the exposure is low birth weight.
3) What is the outcome under study? The outcome under study are personal, social language and motor adaptive skills based on which they were classified as having Delayed development or Normal development
relative Risk= probablity of delayed development in low birth weights / probablity of delayed development in normal birth weights
relative risk= 140/360 / 77/360 =1.82 . Thus low birth weight babies are 1.8 times as likely of developmental delays than normal weight babies.
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