BME100 f2015:Group7 8amL1
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LAB 1 WRITE-UP
Independent and Dependent Variables
Independent Variables: Dosage of Lipopolysaccharide (LPS) provided to elderly patients is independent because LPS has been proven by prior testing to affect the amount of the inflammatory protein, Inflammotin.
Dependent Variable: Amount of Inflammotin produced in patients is dependent because Inflammotin is directly affected by LPS and can be used as a measure of inflammation.
Half of the subjects in each group will be between 65 and 70 years of age, while the other half will be between 70 and 75 years of age to further eliminate discrepancies in the groups due to age. In addition, each group will be comprised of half men and half women.
Subjects will also be tested before the experiment to determine that they have normal levels of inflammotin in their blood (<1mg per liter of blood). Moreover, subjects will be tested for immunity to LPS before the experiment. Lastly, subjects will be screened to make sure that they are in general good health, and are experiencing no conditions (illness, infections) that could alter their inflammatory response. The screening will include both an examination and a background check of medical records. This should ensure that all subjects have a similar response to LPS.
250 people within the ages of 65 and 75 will be screened for the experiment. These people will be selected randomly from the general population. Of the pool of people who meet the requirements, 60 will be randomly selected (as long as the age and gender requirements are met) to participate in the study. The experimenters will not meet the subjects prior to selecting who will be a part of the study; rather, the potential subjects will be screened by separate personnel to make sure that subjects are chosen only based on the available data.
Sources of Error and Bias
Source of error: Inadequate variability in age groups
Control: Divide subjects half 65-70 and half 70-75 in all 6 groups
Control: Test subjects before they are included in study to ensure none have any immunity to lipopolysaccharide
Control: Provide baseline medical history for Inflammotin
Control: Since the drug can test differently in different genders, we must ensure that there are an equal number of men and women in each test group