Mathematics, 17.07.2021 03:50 asshattt
You are interested in finding out whether middle-aged men who have premature heartbeats are at greater risk of developing a myocardial infarction (heart attack) than men whose heartbeats are regular. Electrocardiogram (ECG) examinations are performed on all male office employees 35 years of age or older who work for oil companies in Houston. The ECG tracings are classified as irregular or regular. Five years later, myocardial infarction rates are compared between those with and those without baseline ECG irregularities. What kind of study is this?
a. Cross-sectional study
b. Case-control study
c. Prospective cohort study
d. Retrospective cohort study
e. Clinical trial
f. Community trial
Answers: 3
Mathematics, 21.06.2019 18:30
Select the lengths in centimeters that would form a right triangle
Answers: 1
Mathematics, 21.06.2019 18:30
The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?
Answers: 1
Mathematics, 21.06.2019 19:00
Human body temperatures have a mean of 98.20° f and a standard deviation of 0.62°. sally's temperature can be described by z = 1.4. what is her temperature? round your answer to the nearest hundredth. 99.07°f 97.33°f 99.60°f 100.45°f
Answers: 1
Mathematics, 21.06.2019 23:00
Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.
Answers: 1
You are interested in finding out whether middle-aged men who have premature heartbeats are at great...
Mathematics, 20.09.2020 15:01
Chemistry, 20.09.2020 15:01
Chemistry, 20.09.2020 15:01
Mathematics, 20.09.2020 15:01
Mathematics, 20.09.2020 15:01
Mathematics, 20.09.2020 15:01