Nutritional and behavioral determinants | My Assignment Tutor

Part1: Read the following article and response to the question below: Nutritional and behavioral determinants of adolescent obesity: a case-control study in Sri Lanka BMC Public Health 2014;14;1291 Why is this an important research question to investigate in Sri Lanka? Describe how two different biases could have affected the data collection. Design a cohort study to investigate the risk factors of obesity in adolescents in Sri Lanka utilizing dietary assessment method and mention the strength and limitation of the dietary assessment method that you have chosen. Part2: Read the following article and response to the question below: Incidence of cancer and mortality following alpha-tocopherol and beta-carotene supplementation: a post intervention follow-up. JAMA. 2003 Jul 23;290(4):476-85. What did the evidence from the previous studies shown about the relation between beta-carotene and lung cancer? What were the results of the RCT in relation to beta-carotene and lung cancer? The authors mentioned in the introduction that another study (Physicians’ Health Study) did not demonstrate an effect of β-carotene supplementation on lung cancer (reference number 9 in article). Describe the reasons of the differences between the finding in the results. Note ( I attached the full text of the Hennekens CH, Buring JE, Manson JE. et al. Lack of effect of long-term supplementation with beta carotene on the incidence of malignant neoplasms and cardiovascular disease. N Engl J Med.1996;334:1145-1149.)

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