1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bazaltina [42]
3 years ago
13

You are interested in finding out whether middle-aged men who have premature heartbeats are at greater risk of developing a myoc

ardial 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
Mathematics
1 answer:
Anastasy [175]3 years ago
6 0

Answer:

The answer is "Option C".

Step-by-step explanation:

This study looks after results including such illness growth during the trial time, and this includes additional elements such as suspected risk or source of protection (s). The study usually consists of taking and looking at such a cohort of subjects for a long time. The main advantage of these studies is knowledge accumulation and higher efficiency. Systematic reviews may suffer from choice distortion, in addition to the potential indication misinterpretation.

You might be interested in
If anyone could help me with this last problem, I would greatly appreciate it.
il63 [147K]

Answer:

From the given information, the value of a is 3 and the measurement of ∠R is 25°

Step-by-step explanation:

For this problem, we have to find the value of a and the measurement of ∠R. We are given some information already in the problem.

<em>ΔJKL ≅ ΔPQR</em>

This means that all of the angles and all of the sides of each triangle are going to be equal to each other.

So, knowing this, let;s find the measurement of ∠R first.

All triangles have a total measurement of 180°. We are already given two angle measurements. We are given that the m∠P is 90° because the small box in the triangle represents a right angle and right angles equal 90°. We are also given that the m∠Q is 65° because ∠Q is equal to ∠K so they have the same measurement. Now, let's set up our equation.

65 + 90 + m∠R = 180

Add 65 to 90.

155 + m∠R = 180

Subtract 155 from 180.

m∠R = 25°

So, the measurement of ∠R is 25°.

Now let's find the value of a.

KL is equal to PQ so we will set up an equation where they are equal to each other.

7a - 10 = 11

Add 10 to 11.

7a = 21

Divide 7 by 21.

a = 3

So, the value of a is 3.

4 0
4 years ago
What is 8.57 as a fraction or a mixed number
AURORKA [14]
8\frac{57}{100} or \frac{857}{100}
7 0
4 years ago
Read 2 more answers
Pls help
Annette [7]
The answer is 106036
4 0
3 years ago
∠BCD is reflected over the y-axis. If m∠BCD = 65°, what is the m∠B'C'D'?
daser333 [38]
The answer is 35


Hope this helped heheh :)
5 0
3 years ago
Read 2 more answers
The probability of rain in April is 40%. If there are 30 days in April, how many days would you expect rain?
scoray [572]

Answer:

12 days

Step-by-step explanation:

10% = 3 (30/10)

To find 40%, we can just times the above by 4.

3*4=12 therefore 12 days can expect rain.

Hope this helps!

5 0
2 years ago
Other questions:
  • Graph the system of equations on your graph paper to answer the question. {y=x+2y=−x+8
    11·1 answer
  • What are the domain and range of the function f(x)=2^x+1
    10·2 answers
  • A bank loans a customer $46,000 for a period of 9 years. The simple interest rate of the loan is 8.9%. What is the total amount
    12·1 answer
  • -16x-18y=58 x and y solution of equation
    14·1 answer
  • Peyton's field hockey team wins 4 games out of every 7 games played. Her team lost 9 games. How many games did Peyton's team pla
    7·1 answer
  • Subtract: (6x – 3) - (11x – 8)
    10·1 answer
  • 2x + 3 for x=3<br> Can you guys please help me
    8·2 answers
  • Please answer (middle school) (probability)
    5·2 answers
  • Please help!!!!!!!!!!!!!!!
    8·1 answer
  • Camille bought 120 doughnuts for $60. Her profit was $48 once she sold 80 doughnuts. Write an
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!