# Biostats SPSS Cox Proportional Hazards

Due 4/28/19  7 p.m EST
Be on time, Original Work, Know SPSS, READ Instructions before asking for work!!

Data Attached along with Step by Step Guide.

Cox Proportional Hazard is a regression technique that incorporates the element of time-to-event into the computation of a hazard ratio. A censoring variable is one for which information is only partially known. A time-to-event variable is one that encapsulates the time between starting a treatment and onset of a new event.
For this Assignment, you identify a censoring variable and a time-to-event variable. You also identify an independent variable that represents exposure status (with exposure or without exposure). You then conduct Cox Proportional Hazard regression analysis using these variables to compare survival times for those with and without the exposure. Finally, you interpret the output of the regression, including the testing of the assumption of proportionality and the hazards ratio. Use the Week 9 Dataset (SPSS Document)
The Assignment

Dataset

Access the dataset attached
Identify the censoring variable, given that you wish to evaluate the event stroke.
Identify the time-to-event variable and produce a frequency table to determine the presence of ties
Identify the independent variable for exposure status, given the following research question: Is there an association between hypertension and the time a person was followed before experiencing a stroke?
Create a table with the above variables and their role in this analysis.

Test the assumption of proportionality

Use Kaplan-Meier in SPSS. Create a Hazard plot with time = followed, status=stroke, and factor = hypertension.
Interpret the results: Are the baseline hazards proportional and what does this mean in terms of your planned methodology?

Use SPSS to run a Cox Proportional Hazards test

Use stroke as the event and hypertension as the factor. (be sure to identify hypertension as a categorical variable). Be sure to include the output in your submission.
Create a Hazard Plot for Hypertension (select separate lines)
Interpret the results.
Could the presence of ties in time followed (from the frequency table in 1c) affect the results? How might you accommodate ties in this analysis?

Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
Paper format
• 275 words per page
• 12 pt Arial/Times New Roman
• Double line spacing
• Any citation style (APA, MLA, Chicago/Turabian, Harvard)

# Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

### Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

### Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

### Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

### Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

## Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
\$26
The price is based on these factors: