Why GPT Is Decoder-Only and How It “Reads” Without an Encoder Introduction When people hear the word Transformer , they often think of the classic Encoder–Decoder  architecture used in machine translation. However, Generative models like GPT do not use an encoder at all . This raises a common question: If GPT has no encoder, how does it read and understand text? This article explains: Why GPT is decoder-only How GPT “reads” input without an encoder The role of causal self-att

A Practical Guide to Prediction, Causal Inference, and Longitudinal Data 1. Why Imputation Needs Careful Thinking Missing data occur in almost all clinical datasets: Patients miss visits Laboratory tests are not ordered Follow-up is incomplete Imputation  is used to replace missing values so that: Statistical power is preserved Bias from complete-case analysis is reduced However, imputation is not a neutral technical step .It directly affects: Validity of estimates Model per

1) Core definitions Malnutrition  = deficiency, excess, or imbalance  of nutrients, or impaired nutrient use. ( TB Knowledge Sharing ) Clinically, people often mean undernutrition  (the “too little” side): Undernutrition includes  ( TB Knowledge Sharing ) Wasting / Acute malnutrition  = recent/rapid weight loss → low weight-for-height/length  and/or nutritional oedema . ( fscluster.org ) Stunting / Chronic malnutrition  = long-term growth failure → low height-for-age . ( Worl

In clinical prediction models, the coefficient (slope/weight) tells how much each predictor pushes the predicted risk up or down, while the intercept (baseline/starting level) sets the model’s starting risk before any predictors are applied. When you build a clinical prediction model (CPM) using regression (linear, logistic, Cox, etc.), the model is basically a risk score rule : Start from a baseline level of risk Then add or subtract  risk depending on patient predictors Two

Introduction In trauma medicine, accurately predicting patient outcomes is essential for clinical decision-making, quality assurance, and research . While anatomical scores such as AIS  and ISS  describe injury severity, they do not account for the patient’s physiological condition  at presentation. To address this limitation, the Trauma and Injury Severity Score (TRISS)  was developed. TRISS integrates anatomical injury severity, physiological status, age, and mechanism of i

Introduction Trauma care requires rapid, standardized assessment of injury severity  to guide triage, management, prognosis, and research. To achieve this, trauma systems worldwide use the Abbreviated Injury Scale (AIS)  and the derived Injury Severity Score (ISS) . Together, these tools provide an objective, anatomically based measure of trauma severity  and correlate strongly with morbidity and mortality. Abbreviated Injury Scale (AIS) Definition The Abbreviated Injury Scal

1️⃣ Diagnosis: Ingrown Nail (Onychocryptosis) Definition An ingrown nail  occurs when the edge of the nail plate penetrates the periungual skin , causing inflammation ± infection . Common Sites ✅ Great toe (most common) Less common: fingers (often from trauma, nail biting) Risk Factors (Exam favorite ❗) Improper nail trimming (rounded edges ❌) Tight shoes / high heels Repeated trauma Hyperhidrosis Obesity Diabetes mellitus Nail biting (fingers) Poor foot hygiene 2️⃣ Clinical

Fate/strange Fake: A World That Should Not Exist Among all Fate spin-offs, Fate/strange Fake  occupies a singular and deliberately unstable position within the Nasuverse. It is not merely a parallel timeline or a divergent branch of Proper Human History, but a hybrid anomaly —a world where rules that are normally mutually exclusive coexist simultaneously. In simple terms: Fate/strange Fake is a “mixed world” where the laws of Fate-type universes and Tsukihime-type universes o

1️⃣ KEY DIAGNOSIS COMPARISON TABLE (VERY HIGH-YIELD) Feature Bursitis Synovial Cyst Baker’s Cyst (Popliteal Cyst) Definition Inflammation of a bursa Herniation of synovial lining Posterior knee synovial cyst Origin Bursa (extra-articular) Synovium Synovium Common location Prepatellar, infrapatellar, pes anserine Near joint line Popliteal fossa Joint communication ❌ No ✅ Yes ✅ Yes Compressible ± ✅ ✅ Changes with movement ❌ Minimal ± ✅ Size varies with knee movement Pain with w

💉 Zoster Vaccine (Herpes Zoster / Shingles Vaccine) Overview Herpes zoster (shingles)  is caused by reactivation of varicella-zoster virus (VZV) , leading to a painful vesicular rash and potential complications such as postherpetic neuralgia (PHN) . Vaccination is the most effective method to prevent shingles and its complications. ⭐ Preferred Vaccine: Recombinant Zoster Vaccine (RZV) Brand name:   Shingrix® Shingrix is currently the vaccine of choice worldwide  for shingles

Dyshidrotic Eczema (Pompholyx) Spot diagnosis Intensely itchy Deep, clear vesicles Palms, sides of fingers, soles “Tapioca-like” appearance Triggers Stress, sweating Nickel/cobalt Irritants, atopy Diagnosis Clinical KOH only if tinea suspected Management (OPD) High-potency topical steroid Clobetasol 0.05% ointment BID × 7–14 days Emollients frequently Cold compress Severe flare Prednisone 0.5–1 mg/kg/day PO × 5–7 days (short course) Refractory Tacrolimus ointment Phototherapy

Introduction Sample size calculation is one of the most misunderstood aspects of medical research because there is no single universal rule. The correct approach depends entirely on what the study is trying to achieve. Designing a study is not merely about enrolling participants and running analyses. It is about anticipating the interplay between clinical importance, statistical rigor, ethical responsibility, and resource constraints. Sample size sits at the center of this ba

Sample size rules depend on the objective  of the research — there is no single universal rule. Introduction Sample size calculation is one of the most confusing parts of medical research because there is no single correct rule . The correct approach depends entirely on what the study is trying to achieve . Choose the Rule Based on Your Research Objective A study may aim to: test a hypothesis, build a prediction model, estimate a parameter precisely, evaluate a complex desig

Introduction Muscle cramps are sudden, involuntary, and painful contractions of skeletal muscles, most commonly affecting the calf muscles of the lower limbs. They are frequently encountered in clinical practice and are especially prevalent among athletes, pregnant women, elderly individuals, and patients with fluid or electrolyte disturbances. Understanding the physiological basis of muscle cramps is essential for accurate diagnosis, appropriate management, and success in me

Introduction Definition: Cor pulmonale is right ventricular (RV) dysfunction or failure secondary to pulmonary hypertension caused by diseases of the lungs, pulmonary vasculature, or chest wall  (❌ not due to left-sided heart disease). Clinical Presentation 1. Symptoms Early / Compensated stage Dyspnea on exertion (most common) Fatigue, reduced exercise tolerance Chest discomfort (due to RV ischemia) Palpitations Syncope or presyncope (suggests severe pulmonary hypertension)