Child-Pugh Score Calculation
Based on the provided values (bilirubin 2.75 mg/dL, INR 1.9, ALT 80 U/L), the Child-Pugh score is 4 points, placing this patient in Child-Pugh Class A.
Score Breakdown
The Child-Pugh scoring system assigns points (1-3) across five variables 1, 2, 1:
Your patient's scores:
- Bilirubin 2.75 mg/dL = 2 points (falls in the 2-3 mg/dL range)
- INR 1.9 = 2 points (falls in the 1.7-2.2 range)
- Encephalopathy = Cannot be determined from provided data (requires clinical assessment: none=1 point, grade 1-2=2 points, grade 3-4=3 points)
- Ascites = Cannot be determined from provided data (requires clinical/imaging assessment: absent=1 point, slight=2 points, moderate=3 points)
- Albumin = Not provided (>3.5 g/dL=1 point, 2.8-3.5 g/dL=2 points, <2.8 g/dL=3 points)
Note: ALT 80 U/L is not part of the Child-Pugh calculation 3, 4.
Complete Scoring System
The full Child-Pugh classification requires all five parameters 1, 2, 1:
| Parameter | 1 Point | 2 Points | 3 Points |
|---|---|---|---|
| Bilirubin (mg/dL) | <2 | 2-3 | >3 |
| Albumin (g/dL) | >3.5 | 2.8-3.5 | <2.8 |
| INR | <1.7 | 1.7-2.2 | >2.2 |
| Ascites | None | Slight | Moderate |
| Encephalopathy | None | Grade 1-2 | Grade 3-4 |
Classification
- Child-Pugh A (mild): 5-6 points
- Child-Pugh B (moderate): 7-9 points
- Child-Pugh C (severe): 10-15 points
Clinical Implications
With only partial data (4 points from bilirubin and INR alone), this patient will be Child-Pugh Class A if:
- Albumin >3.5 g/dL (1 point) AND no encephalopathy (1 point) AND no ascites (1 point) = Total 7 points = Class B
- OR if albumin >3.5 g/dL, no encephalopathy, and no ascites = Total 6 points = Class A
The patient needs albumin measurement and clinical assessment of encephalopathy and ascites to complete the score 4. The Child-Pugh score directly impacts treatment decisions, particularly for anticoagulation in atrial fibrillation, hepatocellular carcinoma staging, and liver transplant candidacy 1.
Important Caveats
The Child-Pugh score includes subjective variables (ascites detected by imaging, encephalopathy grading) that can impair reproducibility 5. The ALBI (albumin-bilirubin) score has emerged as a more objective alternative that uses only albumin and bilirubin, though it requires calculation 4, 5. However, Child-Pugh remains the standard for clinical decision-making in most guidelines 1.