Kidney failure patients are commonly treated on dialysis machines that filter to
ID: 3351031 • Letter: K
Question
Kidney failure patients are commonly treated on dialysis machines that filter toxic substances from the blood. The approximate dose for etfective treatment depends on, among other things,duration of trearment and weight gains between treatments as a result of fluid buildup. To study the etfects on the number of days hospitalized (attribuwble to the disease) during a year, a random sample of patients who had undergone dialysis treatment at a large dialysis facility was obtained. Treatment duration was categorized into two groups (short duration, long duration).Avewge weight gain between tremments during the year was categorized in rhree groupS(slight. moderate. substantial) a. Is this study purely experimenral or observational or mixture of both? Why? b. identify all factors. factor levels. and hlctor-Ievel combinations. c. What type of study design is being implemented here? d. What is the basic unit of sludy? Kidney failure patients are commonly treated on dialysis machines that filter toxic substances from the blood. The approximate dose for etfective treatment depends on, among other things,duration of trearment and weight gains between treatments as a result of fluid buildup. To study the etfects on the number of days hospitalized (attribuwble to the disease) during a year, a random sample of patients who had undergone dialysis treatment at a large dialysis facility was obtained. Treatment duration was categorized into two groups (short duration, long duration).Avewge weight gain between tremments during the year was categorized in rhree groupS(slight. moderate. substantial) a. Is this study purely experimenral or observational or mixture of both? Why? b. identify all factors. factor levels. and hlctor-Ievel combinations. c. What type of study design is being implemented here? d. What is the basic unit of sludy? a. Is this study purely experimenral or observational or mixture of both? Why? b. identify all factors. factor levels. and hlctor-Ievel combinations. c. What type of study design is being implemented here? d. What is the basic unit of sludy?Explanation / Answer
a) It is an observational study because the we are just observing patients and measuring variables of interest without assigning treatments to the subjects. The treatment that each patient receives is determined beyond the control of the investigator.
b) factor is the number of days in a year the patient is hospitalized. The factor levels are short duration and long duration.
c) This is a randomizes design.
d) Unit is the patients in the hospital.
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