Study Lancet Found Explained for Students (Easy Guide)

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A study in The Lancet found that although CT scans are useful clinically, they may increase the risk of cancer due to exposure to ionizing radiation. The cancer risks may be especially problematic for children, because they are more sensitive to radiation than adults. The study included patients without previous cancer diagnoses who were first examined with CT in National Health Service (NHS) centers in England, Wales, or Scotland between 1985 and 2002, when they were younger than 22 years of age. The researchers obtained data for cancer incidence, mortality, and loss to follow-up from the NHS Central Registry from Jan 1, 1985, to Dec 31, 2008. Greater exposure to CT scans among children results in triple the risk of leukemia and brain cancer. The authors began data collection for their study in 2010. What type of study design are the researchers using? Group of answer choices Case-control study Retrospective cohort study RCT Ecological study Prospective cohort study

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