Section: Module 6: Lesson 1: Confounding and Effect Modification | Biostatistics

Course Activities and Resources

Biostatistics Research - NLM PubMed

Effects of positive airway pressure therapy on quality of life in patients with obstructive sleep apnea syndrome

Thu, Jul 16, 2026, 05:00 AM

CONCLUSION: Significant improvements in HRQoL were observed following CPAP therapy, regardless of disease severity, gender, presence of comorbid conditions, and smoking status. With the exception of AES scores, these improvements were also independent of the duration of CPAP therapy. Among the HRQoL scales, only AES scores showed a statistically significant reduction after more than six months of CPAP therapy.
Commercial tobacco retail marketing in rural communities in Appalachian Kentucky, 2024

Thu, Jul 16, 2026, 05:00 AM

CONCLUSIONS: Conventional combustible and smokeless products were widely available throughout Appalachian Kentucky. Newer non-combustible products were less available in the most rural areas. Exterior store marketing was less present in the most rural areas.
Relationship Between Depression and Constipation: A Cross-Sectional Health Report From the PERSIAN Guilan Cohort Study (PGCS)

Thu, Jul 16, 2026, 05:00 AM

CONCLUSION: These findings demonstrated that depression was significantly associated with higher odds of constipation, particularly among males, highlighting the need for integrated mental and gastrointestinal health assessments.
Federated feature selection with false discovery rate control

Thu, Jul 16, 2026, 05:00 AM

Selecting a set of universally relevant features associated with a given response variable across multiple distributed data sites is an important problem in numerous scientific fields. However, performing this federated feature selection task becomes challenging when individual-level data cannot be shared due to privacy concerns. The problem is further complicated by potential heterogeneity in both feature distributions and model parameters across sites. In this paper, we propose Fed-false...
Defining a High-Quality Living Kidney Donor Evaluation: A Delphi Survey and Consensus Conference Summary Report

Thu, Jul 16, 2026, 05:00 AM

CONCLUSION: Collectively, these recommendations provide a framework to guide quality improvement, benchmarking, and policy development, with implications for strengthening the LKD evaluation process worldwide.

Introduction

Course Registration

Peer Corner

Pre-test

Module 1: The Basics of Biostatistics

Module 1: Lesson 1: Introduction to Biostatistics

Biostatisticians: Do You Know What They Do? (4 minutes)

Johns Hopkins Bloomberg School of Public Health – Statistics for laboratory scientists I (5 mins)

Basic statistical tools in research and data analysis (22 mins)

Biostatistics

Module 1: Lesson 2: Types of Variables, Plots, and Graphs

Levels of Measurement (15 mins)

Introductory Statistics (80 mins)

Chapter 4 – Exploratory Data Analysis (20 mins)

Chapter 2 – Defining and Classifying Data Variables (20 mins)

Quiz: Module 1: Lesson 2

Types of Variables (14 mins)

Module 1: Lesson 3: Descriptive Statistics and Distribution

Chapter 4 – Exploratory Data Analysis (25 mins)

One Categorical Variable (13 mins)

Statistics by Example (35 mins)

4.2 – The Normal Curve (10 mins)

Quiz: Module 1: Lesson 3

Introductory Statistics (45 mins)

Module 1: Lesson 4: Data Analysis and Study Design

Dr. Elizabeth Newton – 15.075, Applied Statistics (15 mins)

Importance of using basic statistics adequately in clinical research (26 mins)

Webinar Using Data to Guide and Evaluate Responses to the Opioid Crisis Rhode Island's Drug Overdose

Peer-to-Peer Activity

Mentored Activity

Quiz: Module 1: Lesson 4

2.7 – Statistical Ethics (2 mins)

Module 2: Probability and Sampling Distributions

Module 2: Lesson 1: Probability, Frequency, and the Concepts of Probability

Introduction to Probability (30 mins)

Introductory Statistics (25 mins)

Basic Probability Rules (40 mins)

Introductory Statistics (40 mins)

Quiz: Module 2: Lesson 1

Johns Hopkins Bloomberg School of Public Health – Probability (15 mins)

Johns Hopkins Bloomberg School of Public Health – Probability Concepts (35 mins)

Module 2: Lesson 2: Variables, Sampling, and Distribution

Unit 3B: Random Variables (80 mins)

3.2.2 – Binomial Random Variables (15 mins)

Sampling (30 mins)

Inferential Statistics (15 mins)

Chapter 3 - Review of Probability (105 mins)

Introduction to Sampling Distributions (20 mins)

Central Limit Theorem (11 mins)

The Sampling Distribution (10 mins)

Normal Random Variables (80 mins)

1.5.1 – Measures of Central Tendency (30 mins)

Asynchronous Learning Activity: Probability and Sampling Distributions Problem Set

Quiz: Module 2: Lesson 2

Module 3: Confidence Intervals

Module 3: Lesson 1: Point and Confidence Interval Estimation

Introduction to Estimation (30 mins)

4.2 – Introduction to Confidence Intervals (7 mins)

Introductory Statistics (60 mins)

Module 5: Interval Estimation (9 mins)

Basic Concepts of Inference (60 mins)

Quiz: Module 3: Lesson 1

9.1 – Confidence Intervals for a Population Proportion (13 mins)

Module 3: Lesson 2: Effect of Sample Size on Confidence Interval

Power and Sample Size Determination (30 mins)

Confidence Intervals Introduction (30 mins)

Quiz: Module 3: Lesson 2

Module 4: Hypothesis Testing

Module 4: Lesson 1: Principles of Hypothesis Testing

S.3 Hypothesis Testing (45 mins)

Significance Testing (15 mins)

1.1.2 – Explanatory and Response Variables (3 mins)

10.1 – Setting the Hypotheses: Examples (9 mins)

Significance Testing and Confidence Intervals (7 mins)

Quiz: Module 4: Lesson 1

Biostatistics Series Module 2: Overview of Hypothesis Testing (26 mins)

7.1.5. What is the relationship between a test and a confidence interval? (2 mins)

Module 4: Lesson 2: Applications of Hypothesis Testing

Introductory Statistics (60 mins)

Introductory Statistics (30 mins)

Lesson 3: SLR Estimation & Prediction (30 mins)