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Related Concept Videos

Comparing the Survival Analysis of Two or More Groups01:20

Comparing the Survival Analysis of Two or More Groups

Survival analysis is a cornerstone of medical research, used to evaluate the time until an event of interest occurs, such as death, disease recurrence, or recovery. Unlike standard statistical methods, survival analysis is particularly adept at handling censored data—instances where the event has not occurred for some participants by the end of the study or remains unobserved. To address these unique challenges, specialized techniques like the Kaplan-Meier estimator, log-rank test, and Cox...
Cancer Survival Analysis01:21

Cancer Survival Analysis

Cancer survival analysis focuses on quantifying and interpreting the time from a key starting point, such as diagnosis or the initiation of treatment, to a specific endpoint, such as remission or death. This analysis provides critical insights into treatment effectiveness and factors that influence patient outcomes, helping to shape clinical decisions and guide prognostic evaluations. A cornerstone of oncology research, survival analysis tackles the challenges of skewed, non-normally...
Blinding01:11

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
Cancer Prevention02:59

Cancer Prevention

Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
Some...
Randomized Experiments01:13

Randomized Experiments

The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
Simple randomization
Simple...
Hazard Ratio01:12

Hazard Ratio

The hazard ratio (HR) is a widely used measure in clinical trials to compare the risk of events, such as death or disease recurrence, between two groups over time. It reflects the ratio of hazard rates—the instantaneous risk of the event occurring—between a treatment group and a control group. This measure provides valuable insights into the relative effectiveness of a treatment by assessing how the risk of an event differs between the two groups.
For example, in a clinical trial evaluating a...

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Related Experiment Video

Updated: Jul 18, 2026

E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy
06:28

E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy

Published on: August 1, 2019

A randomized controlled trial comparing two educational booklets on prostate cancer.

Deb Feldman-Stewart1, Michael D Brundage, Rob Siemens

  • 1Division of Cancer Care and Epidemiology, Cancer Research Institute, Queen's University, Kingston, Ontario, Canada.

The Canadian Journal of Urology
|December 26, 2006
PubMed
Summary

Two prostate cancer educational booklets were compared. The CCE booklet was rated more helpful for organizing thoughts, understanding the situation, deciding on treatment, and planning care.

Related Experiment Videos

Last Updated: Jul 18, 2026

E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy
06:28

E-Patient Counseling Trial (E-PACO): Computer Based Education versus Nurse Counseling for Patients to Prepare for Colonoscopy

Published on: August 1, 2019

Area of Science:

  • Oncology
  • Patient Education
  • Health Communication

Background:

  • Patient education is crucial for managing early-stage prostate cancer.
  • Assessing the effectiveness of educational materials is vital for improving patient understanding and decision-making.

Purpose of the Study:

  • To compare the helpfulness of two distinct educational booklets designed for early-stage prostate cancer patients.
  • To evaluate patient and family member perceptions of information utility for decision-making and support.

Main Methods:

  • A comparative study involving patients and family members across three centers.
  • Participants received either the AstraZeneca (AZ) or the CCE booklet.
  • The Purpose-based Information Assessment tool measured perceived helpfulness for organizing thoughts, understanding, treatment decisions, planning, and emotional support.

Main Results:

  • The CCE booklet was read for a longer duration and found easier to navigate.
  • Participants rated the CCE booklet as significantly more helpful for organizing thoughts, understanding their situation, deciding on treatment, and planning care.
  • Both booklets received high helpfulness ratings, indicating general benefit from educational aids.

Conclusions:

  • While both educational aids are beneficial, they are not equally effective.
  • The systematically developed CCE booklet demonstrated superior helpfulness in key areas for prostate cancer patients.
  • The CCE booklet is a valuable, readily available resource for urologists and their patients.