Results 241 to 250 of about 49,584,610 (301)
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Respiratory Care, 2023
Studies can be observational or experimental. With an observational study, the investigator does not determine the assignment of subjects, and there might not be a control group. If there is a control group, assignment of the independent variable (exposure or intervention) is not under the control of the investigator.
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Studies can be observational or experimental. With an observational study, the investigator does not determine the assignment of subjects, and there might not be a control group. If there is a control group, assignment of the independent variable (exposure or intervention) is not under the control of the investigator.
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Clinical Obstetrics and Gynecology, 1998
Observational studies are important methodologies to evaluate exposures and risk factors that are not amenable to experimental trials. They offer the advantage of being more generalizable to our patients, as these studies may have more liberal inclusion criteria than the typical randomized trial. Their disadvantage is their susceptibility to biases and
J F, Peipert, M G, Phipps
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Observational studies are important methodologies to evaluate exposures and risk factors that are not amenable to experimental trials. They offer the advantage of being more generalizable to our patients, as these studies may have more liberal inclusion criteria than the typical randomized trial. Their disadvantage is their susceptibility to biases and
J F, Peipert, M G, Phipps
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2007
Much can be learned about a process by observing changes over time or by comparing two different processes under different conditions. This chapter introduces the major types of observational study designs: the longitudinal or cohort study, the comparative or case-control study, and some of their variants.
Raymond G, Hoffmann, Hyun Ja, Lim
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Much can be learned about a process by observing changes over time or by comparing two different processes under different conditions. This chapter introduces the major types of observational study designs: the longitudinal or cohort study, the comparative or case-control study, and some of their variants.
Raymond G, Hoffmann, Hyun Ja, Lim
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The American Journal of Nursing, 1954
aides and attendants on our staff. All are between the ages of 17 and 45, the average being 18 years. They have been graduated from high school or have comparable education or experience. Many of our attendants are young men who are attending junior college and who work four to six hours daily during the school week and sometimes eight hours on ...
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aides and attendants on our staff. All are between the ages of 17 and 45, the average being 18 years. They have been graduated from high school or have comparable education or experience. Many of our attendants are young men who are attending junior college and who work four to six hours daily during the school week and sometimes eight hours on ...
openaire +2 more sources