This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A prospective study on the relationship between sleep deprivation and heart disease was done by ... (Read 124 times)

soccerdreamer_17

  • Hero Member
  • *****
  • Posts: 552
on: Jul 24, 2018
A prospective study on the relationship between sleep deprivation and heart disease was done by Ayas, et. al. (Arch Intern Med 2003). Women who slept 6 hours a night were compared to women who slept for 8 hours a night (reference group). After adjusting for potential confounding variables like smoking, a 95 confidence interval for the relative risk of heart disease was (0.98, 1.42). Based on this confidence interval, state what the association between sleep deprivation and heart disease is.

Question 2

At a small college somewhere on the East coast, 20 of the girls and 30 of the boys smoke at least once a week. Independent random samples of 75 girls and 100 boys are to be selected and the proportions of smokers in the samples are to be calculated. What is probability that the sample proportion of girl smokers is greater than the sample proportion of boy smokers?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tjayeee

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 24, 2018
Answer to Question 1

There is no conclusive evidence, based on this study, that the association (as measured by relative risk) is different from 1 (equal risk).

Answer to Question 2

0.0623


soccerdreamer_17

  • Hero Member
  • *****
  • Posts: 552
Reply #2 on: Jul 24, 2018
Both answers were spot on, thank you once again


tjayeee

  • Sr. Member
  • ****
  • Posts: 329
Reply #3 on: Jul 24, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

Relationship between HoxC-6 gene expression and neck development. Relationship between HoxC-6 gene expression and neck development.
Adenosine and Sleep Adenosine and Sleep
The flow of blood valves of the heart. The flow of blood valves of the heart.
Disease-Modifying Antirheumatic Drugs (DMARDs) and Biologic Therapies Disease-Modifying Antirheumatic Drugs (DMARDs) and Biologic Therapies
Tumor marker analysis of a patient undergoing therapy, who (1) after surgery had residual disease ... Tumor marker analysis of a patient undergoing therapy, who (1) after surgery had residual disease ...
Seattle Longitudinal Study Seattle Longitudinal Study
Video: Factors that affect conduction rates (myelination, axon diameter & temperature)

For a complete list of videos, visit our video library