
How to Analyze Correlated Data in Clinical Research: A Stepwise Guide
Introduction Clinical research frequently involves data that are not statistically independent. Measurements may be taken repeatedly over...

How to Build a Clinical Prediction Model: A Step-by-Step Guide
Introduction Clinical prediction models (CPMs) are statistical tools designed to estimate the likelihood that a patient has—or will...


Symptom-Based Treatment Guide for Acute Gastroenteritis (AGE) in Adults: Diarrhea, Abdominal Cramping Pain, Nausea & Vomiting (N/V), and Fever Bacterial Diarrhea
Symptom First-Line Drug Dose & Frequency (Adult) Alternative (less preferred) Dose & Frequency (Adult) Notes Diarrhea Diosmectite 1...

Acute Monoarticular Gouty Arthritis: Diagnosis and Inpatient Management Guide
🩺 Provisional Diagnosis: Acute Monoarticular Gouty Arthritis 📋 Diagnosis Criteria (based on 2015 ACR/EULAR Gout Classification...

Diagnostic Added-Value Explained: How NRI and IDI Improve Test Evaluation, Net Reclassification Improvement
Introduction Adding a new test or biomarker to an existing diagnostic process might seem beneficial—but does it actually improve...

Beyond AUC: Understanding Net Reclassification Improvement (NRI) and Integrated Discrimination Improvement (IDI)
Introduction When evaluating a new diagnostic test or biomarker, we often compare it against existing methods using the Area Under the...

From Test Result to Clinical Judgment: Predictive Values, Likelihood Ratios, and Post-Test Probability Explained
Introduction Diagnostic accuracy statistics like sensitivity and specificity describe how well a test performs in identifying disease...

Analyzing Diagnostic Test Accuracy: Sensitivity, Specificity, Predictive Values & Likelihood Ratios Explained
Introduction Diagnostic tests are only as useful as their demonstrated performance. Once data from a diagnostic accuracy study have been...

How Accurate Is That Test? A Beginner’s Guide to Diagnostic Accuracy Metrics
Introduction Imagine you’re a doctor trying to decide if a patient truly has a disease. You order a test, but how do you know whether the...

Understanding Diagnostic Accuracy Research: Sensitivity, Specificity, and Beyond
Introduction Diagnostic accuracy research forms the bedrock of evidence-based diagnostic practice. Its goal is to assess how effectively...

Snow Lotus Cream (บัวหิมะ) vs. Corticosteroid Creams in Urticaria and Dermatitis
Comparison Summary: Snow Lotus Cream vs. Corticosteroid Creams Feature Snow Lotus Cream Triamcinolone (Medium Potency) Betamethasone...

Systematic Review Automation: Elicit vs ASReview LAB
Systematic-review automation now comes in two very different flavours: Elicit’s Systematic Review workflow , a closed-source “AI research...

Deep Research Showdown: Elicit vs GPT-4o vs Gemini Studio AI
This is a Deep Research feature-only deep dive comparing Elicit Research Reports , GPT Deep Research (GPT-4o + o3) , and Gemini Studio...

Normality Test: Shapiro–Wilk, Lilliefors, SD vs. Mean Rule, Pearson r, and MAD
Comparison Table of Normality Assessment Methods 🔍 M1 – Shapiro–Wilk Test 📍 When to Use It (Indications) Small to moderate samples (n <...

Fixing Adobe Creative Cloud Error 191 on Windows 11 (2025)
If you're stuck with Error 191 during install or update of Adobe Creative Cloud Desktop, here’s how I solved it—tested on Windows 11...

รู้จักระบบไฟล์ exFAT, NTFS, EXT2, EXT3, EXT4: เลือกอย่างไรให้เหมาะกับการใช้งาน
ระบบไฟล์ (File System) คือหัวใจสำคัญของการจัดการข้อมูลในระบบคอมพิวเตอร์ เปรียบเสมือน "ระบบจัดชั้นเอกสาร" ที่ทำให้ระบบปฏิบัติการสามารถจัดร...

Defragment and Optimize Drives คืออะไร?
🔧 Defragment and Optimize Drives คืออะไร? Defragment and Optimize Drives คือยูทิลิตี้ (utility) ที่มีอยู่ในระบบปฏิบัติการ Windows...

GERD Explained: Pathophysiology, Drug Management, and Treatment Strategy
🧠 GERD: Pathophysiology and Clinical Insights Definition : GERD is a chronic condition where stomach contents, primarily acid, reflux...

Adrenal Insufficiency (AI) from Exogenous Steroids (Prednisolone): Diagnosis, Risk, and Tapering Guide
🔬 Pathophysiology Adrenal insufficiency (AI) occurs when the adrenal glands fail to produce sufficient cortisol. In the case of...

Geometric Mean: When and Why It Matters in Clinical Research
Definition: The geometric mean is the nth root of the product of n values , used to summarize positive, skewed data . It is defined as:...

Polynomial vs. Multinomial Regression in Clinical Research
🔍 Polynomial vs. Multinomial Regression in Clinical Research 1. Polynomial Regression Purpose : Captures nonlinear trends in continuous...

Rabies PEP Management Summary with ID Preference + Tetanus Immunization After Wounds (หมากัด แมวข่วน รถล้ม แผลถลอก)
💉 Rabies PEP Management Summary with ID Preference Exposure Category Immune Status Vaccination History Management Vaccine Schedule RIG Required? CAT 1 All Any ❌ No treatment needed – ❌ No CAT 2 Normal Vaccinated <6 months Booster ✅ Day 0 only (1 dose) • IM or ID 2-site ❌ No CAT 2 Normal Vaccinated >6 months Booster ✅ Day 0, 3 • IM or ID 2-site or ID 4-site Day 0 ❌ No CAT 2 Normal Never vaccinated Full vaccine ✅ ID 2-site Days 0, 3, 7, 28 or IM Days 0, 3, 7, 14, 28 ❌ No CAT

Choosing GEE Correlation aka. Repeated Measures: ind = Independence, exc = exchangeable, ar1 = Autoregressive Order 1, sta1 = Stationary m-dependent (m=1), uns = Unstructured
Marginal Model-Based Correlation Structures in GEE (Generalized Estimating Equations) Marginal models (via GEE) assume correlated...
