Different studies say a lot find more resources at oneclasscom find more

Different studies say a lot find more resources at

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Different studies say a lot find more resources at oneclass.comfind more resources at oneclass.com
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Types of Studies (Meta Analysis) Observational (Epidemiological) Studies CASE CONTROL STUDYCompare people with a specific condition (case) to other people who are otherwise similar except for that condition (control) *Retrospective*: go back and ask questions about lifestyle Ex.: association between smoking and lung cancer COHORT STUDYStudy of a group of people over a long period of time to determine which factors may be associated with the appearance of a specific condition. The subjects do not have any particular condition at the beginning, and we want to see under what particular condition a particular condition will develop *Prospective*: to go ahead Link between Case control and Cohort studies: Control study: people have developed a particular condition (retrospective) Cohort study: at the onset, the is no indication of any problem (prospective) EPIC (European Perspective Investigation into Cancer) Study : Involving 520 000 people in 10 European countries suggests that increased intake f fruits and vegetables has a minimal effect on caner rates (But fruits and vegetables do have an effect on heart diseases) Correlation VS Causation Assignment of subjects is controlled by the investigator Interventional Controlled Study : Double blind randomized placebo-controlled studyEX.: Vitamin D and calcium supplementation reduces cancer risk (randomized trial). 60% reduction in cancer incidence for people that took a blend of vitamin D and calcium find more resources at oneclass.comfind more resources at oneclass.com
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PLACEBO RESPONSE:Placebo effect is very IMPORTANTIf the person believes that something will make them feel better, 30% of the time it will BLIND STUDY: One group will have the actual medicine while the other will have the placebo, which will taste the same or have the sae shape as the substance we want to try The subjects do not know which substance is which DOUBLE BLIND STUDY: Both the people that are under the study and the researcher need to not know which one is which (so that their behaviour doesnt reveal it to the subjects) RANDOMIZED: Make sure that the people doing the study in both groups are picked randomly and that there is no other confronting factor that will come into the picture You can have studies that are meta analysis involving epidemiological studies or involving interventional studies Review of this section: Types of Studies (Meta Analysis): Observational (epidemiological) studies: Case control studies, Cohort studies Double blind placebo controlled randomized studies find more resources at oneclass.comfind more resources at oneclass.com
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Casimir Funk: Vital amines, that turned into Vitamins All the chemicals associated to nutritional deficiency diseases are known as vitamins Vitamins for stress: people that have a lower levels of vitamin B and C Medication (contraceptive pill) can lower the vitamin B level
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