Question 2 Which of the following are observational studies? 1. An examination of the medical record of more than 360,00
Posted: Thu Jul 14, 2022 4:51 pm
Question 2
Which of the following are observational studies?
1. An examination of the medical record of more than 360,000Swedish men showed that those who were overweight or who had highblood pressure had a higher risk of kidney cancer. (New England J.of Medicine 3434 [2000]:1305)
2. Scientists examined the glycogen content of rats’ brainsat the rat’s normal bedtimes and after they had been kept awake foran extra 6, 12, or 24 hours. The scientists found that glycogen was38% lower among the rats that had been sleep-deprived for 12 hoursor more, and that the levels recovered during subsequent sleep.These researchers speculate that we may need to sleep in order torestore the brain’s energy fuel. (Science News, July 20, 2002).
3.Over a 4 month period, among 30 people living with bipolardisorder, patients who were given a high dose (10g/day) of omega-3fats from fish oil improved more than those given a placebo.(Archives of General Psychiatry 56 [1999]: 407).
4. In 2001 a report in the Journal of the American CancerInstitute indicated that women who work nights have a 60% greaterrisk of developing breast cancer. Researchers based these findingson the work histories of 763 women with breast cancer and 741 womenwithout the disease.
Which of the following are observational studies?
1. An examination of the medical record of more than 360,000Swedish men showed that those who were overweight or who had highblood pressure had a higher risk of kidney cancer. (New England J.of Medicine 3434 [2000]:1305)
2. Scientists examined the glycogen content of rats’ brainsat the rat’s normal bedtimes and after they had been kept awake foran extra 6, 12, or 24 hours. The scientists found that glycogen was38% lower among the rats that had been sleep-deprived for 12 hoursor more, and that the levels recovered during subsequent sleep.These researchers speculate that we may need to sleep in order torestore the brain’s energy fuel. (Science News, July 20, 2002).
3.Over a 4 month period, among 30 people living with bipolardisorder, patients who were given a high dose (10g/day) of omega-3fats from fish oil improved more than those given a placebo.(Archives of General Psychiatry 56 [1999]: 407).
4. In 2001 a report in the Journal of the American CancerInstitute indicated that women who work nights have a 60% greaterrisk of developing breast cancer. Researchers based these findingson the work histories of 763 women with breast cancer and 741 womenwithout the disease.