Cox Proportional Hazard Survival Regression Quiz

What is the primary purpose of Cox regression in survival analysis?

• To determine the influence of variables on survival time

• To compare two different populations

• To predict future events

• To calculate the average lifespan

In survival time analysis, what does a survival curve represent?

• The average age of subjects

• The rate of disease occurrence

• The number of subjects alive over time

• The total number of subjects in a study

What is meant by 'censored' data in survival analysis?

• Data that is removed from the study

• Data that is incomplete due to a lack of resources

• Data that has a definite event

• Data that is irrelevant to the study

Which test is used for simple situations with a single factor in survival analysis?

• T-test

• Chi-square test

• Log-rank test

• ANOVA

What additional factor requires the use of Cox regression instead of the log-rank test?

• Gender of the subjects

• Duration of the study

• Age of the subjects

• Type of disease

What is the first step in calculating Cox regression with an example dataset?

• Comparing different datasets

• Calculating the mean survival time

• Entering data into a software tool

• Collecting data from various sources

Which website is mentioned for performing Cox regression analysis?

• dataanalysis.com

• regressionhub.com

• datadept.net

• stattools.org

What does a p-value less than 0.05 indicate in Cox regression results?

• The null hypothesis is rejected

• The data is not reliable

• The regression coefficient is not significant

• The null hypothesis is accepted

If the p-value for a variable is greater than 0.05, what can be concluded?

• The data is incorrect

• The variable has no significant effect

• The variable has a significant effect

• The study needs to be repeated

What is the significance level commonly set at in statistical analysis?

• 1%

• 10%

• 5%

• 0.5%