**Question:** MELD score includes

A. Child-Turcotte-Pugh (CTP) score components
B. Serum sodium concentration
C. Serum bilirubin level
D. Serum creatinine concentration

**Core Concept:** MELD score is a mathematical model used to predict 30-day mortality in patients with cirrhosis and chronic liver disease. It combines four parameters: serum sodium, bilirubin, creatinine, and international normalized ratio (INR). The Child-Turcotte-Pugh (CTP) score is another scoring system used to assess liver function.

**Why the Correct Answer is Right:** The MELD score evaluates various physiological aspects of patients with liver disease. The inclusion of B (serum sodium concentration) and D (serum creatinine concentration) reflects the impact of kidney function and electrolyte imbalance on overall health in these patients.

**Why Each Wrong Option is Incorrect:**

A) Child-Turcotte-Pugh (CTP) score components are not directly included in the MELD score. While both scores assess liver function, they use different parameters and have different purposes. The MELD score focuses on mortality prediction, while the CTP score is a staging system.

C) Serum bilirubin alone does not accurately predict 30-day mortality in cirrhosis patients. The MELD score considers bilirubin levels in conjunction with other parameters to provide a comprehensive assessment of disease severity and prognosis.

**Clinical Pearl:** The MELD score is a more accurate predictor of mortality compared to the CTP score. Regularly monitoring MELD scores can help clinicians assess disease progression and adjust treatment strategies accordingly, enabling better patient management and outcomes.