A study is planned to compare the blood pressure lowering effect of two medications (drug A and B) in patients with elevated systolic blood pressure. Drug A is a newly developed medication lowering the elevated SBP and drug B is a commonly prescribed medication for high SBP. 80 newly diagnosed patients with high SBP are recruited into the study with half of them randomly assigned to drug A and another half to drug B for 3 months. Each participants blood pressure will be monitored during the study, but the change in SBP (mmhg) will be recorded as the difference between SBP measured at the end of the study and SBP measured on entering the study.

Question

A) What type of study is this?- Experimental(RTC)?
b)How many factorz (variables) are involved in this study and what are they?- I said 3 Drug A's effectiveness, Drug Bs effectiveness, and Systolic Bp?
c) Wat are the measurement scales for these factors (variables)?- I said nominal for both drugs, and ratio
2
An investigator reviewed 700 singleton birth records from the past 5 years at the Hospital. A total of 56 records were identified as low birth weight (birth weight less then 2500 mg). She also identified another 56 infants whose birth weight was higher then 2500mg, but who were born the same day and matched with the same gender as in the low birth weight. Each infants mother was interviewed to determine whether cigarette smoking exposure was associated with fetal birth weight.
A)What type of study?- I said case control
b)How many factors (variables) are involved in this study? What are they?- Birth weight, smoking, gender, date of of birth,

c)What are the measurement scales for these factors?-ratio, nominal, nominal, ratio? (in order of the 4 factors listed above)

Really appreciate any help