Relative efficacy
ROC curves were established to evaluate the relative efficacy of the CTP, MELD, MELD-Na+, and ALBI scores for predicting both short-term and long-term mortality (Fig. 1). The AUROC values for survival during index hospitalization were 0.823 for the MELD-Na+ score, 0.817 for the MELD score, 0.770 for the CTP score, and 0.719 for the ALBI score. For 28-day survival, the AUROC values were 0.810 for the MELD-Na+ score, 0.804 for the MELD score, 0.789 for the CTP score, and 0.746 for the ALBI score. For 90 days-day survival, the AUROC values were 0.771 for the MELD-Na+ score, 0.759 for the MELD score, 0.755 for the CTP score, and 0.701 for the ALBI score. For six-month survival, the AUROC values were 0.782 for the MELD-Na+ score, 0.771 for the MELD score, 0.767 for the CTP score, and 0.727 for the ALBI score. For one-year survival, the AUROC values were 0.792 for the MELD-Na+ score, 0.778 for the MELD score, 0.774 for the CTP score, and 0.743 for the ALBI score. For two-year survival, the AUROC values were 0.783 for the MELD-Na+ score, 0.757 for the MELD score, 0.783 for the CTP score, and 0.739 for the ALBI score. For three-year survival, the AUROC values were 0.787 for the MELD-Na+ score, 0.758 for the MELD score, 0.784 for the CTP score, and 0.755 for the ALBI score (Fig. 1, Table 1). The performance of the ALBI score in discriminating between survivors and non-survivors was not found to be superior in predicting either short-term or long-term survival compared to the CTP, MELD, and MELD-Na+ scores (Fig. 1, Table 1).
Table 1Comparison of AUROC of MELD-Na+, MELD, CTP Score, and ALBI Score for patient survival
Alive | MELD Na+ | MELD | CTP score | ALBI score |
---|
Hospital survival (n = 387) | 0.823 | 0.817 | 0.770 | 0.719 |
28 days (n = 295) | 0.810 | 0.804 | 0.789 | 0.746 |
90 days (n = 170) | 0.771 | 0.759 | 0.755 | 0.701 |
6 months (n = 137) | 0.782 | 0.771 | 0.767 | 0.727 |
1 year (n = 107) | 0.792 | 0.778 | 0.774 | 0.743 |
2 years (n = 84) | 0.783 | 0.757 | 0.783 | 0.739 |
3 years (n = 69) | 0.787 | 0.758 | 0.784 | 0.755 |
Risk prognostication
All ALD patients were divided into non-survivor and survivor groups, and survival rates during hospitalization, at 28 days, 90 days, six months, one year, two years, and three years were determined. A comparison of baseline parameters between patients for short-term survival (28 days) and long-term survival (three years) was performed. On comparison of baseline parameters between patients for short-term survival (i.e., patients who survived 28 days and those who died), non-surviving patients had decreased mean arterial pressure (79.82 ± 11.23 mm Hg vs. 84.23 ± 8.61 mm Hg; p < 0.001), a higher total leucocyte count per deciliter (dL) (10,800 vs. 8,600; p < 0.001), higher serum creatinine (1.80 vs. 1.1 mg/dL; p < 0.001), higher serum urea (55 mg/dL vs. 31 mg/dL; p < 0.001), higher total bilirubin (7.9 mg/dL vs. 3.4 mg/dL; p < 0.001), decreased serum sodium (130.05 ± 7.94 mEq/L vs. 134.90 ± 6.74 mEq/L; p < 0.001), decreased total albumin (2.42 ± 0.45 g/dL vs. 2.59 ± 0.46 g/dL; p < 0.001), higher international normalized ratio (INR) (2.37 vs. 1.76; p < 0.001), higher MELD (29.46 ± 8.41 vs. 19.43 ± 7.73; p < 0.001), higher MELD (Na+) (31.59 ± 7.49 vs. 21.72 ± 8.26; p < 0.001), higher CTP score (12.57 ± 1.59 vs. 10.60 ± 1.86; p < 0.001), and higher ALBI score (0.379 vs. 0.137; p < 0.001) (Table 2). On comparison of baseline parameters for long-term survival (i.e., patients who survived three years vs. those who died), patients who died had increased body mass index (22.61 ± 4.32 kg/m2 vs. 21.68 ± 2.70 kg/m2; p = 0.018), a higher total leucocyte count per deciliter (10,000 vs. 8,000; p < 0.001), higher serum creatinine (1.40 vs. 1.1 mg/dL; p < 0.001), higher serum urea (41 mg/dL vs. 29 mg/dL; p < 0.001), higher total bilirubin (5.5 mg/dL vs. 2 mg/dL; p < 0.001), decreased serum sodium (132.23 ± 7.60 mEq/L vs. 137.49 ± 6.04 mEq/L; p < 0.001), decreased total albumin (2.47 ± 0.44 g/dL vs. 2.86 ± 0.49 g/dL; p < 0.001), higher INR (2.04 vs. 1.53; p < 0.001), higher MELD (24.59 ± 9.24 vs. 16.31 ± 6.82; p < 0.001), higher MELD (Na+) (27.0 ± 8.81 vs. 17.40 ± 7.93; p < 0.001), higher CTP score (11.69 ± 1.83 vs. 9.51 ± 1.99; p < 0.001), and higher ALBI score (0.292 vs. −0.037; p < 0.001) (Table 2).
Table 2Baseline characteristics and comparison of MELD, MELD-Na+, CTP, and ALBI scores between survivors and non-survivors at 28 days and three years
n = 490 | 28 days
| 3 years
|
---|
Alive (n = 295) | Dead (n = 195) | p-value | Alive (n = 69) | Dead (n = 421) | p-value |
---|
Age (years) (Mean ± SD) | 45.63 ± 9.90 | 45.68 ± 10.51 | 0.965 | 45.54 ± 9.35 | 45.67 ± 10.27 | 0.917 |
MAP (mmHg) (Mean ± SD) | 84.23 ± 8.61 | 79.82 ± 11.23 | <0.001 | 83.85 ± 7.79 | 82.25 ± 10.27 | 0.136 |
BMI (kg/mt2) (Mean ± SD) | 22.41 ± 4.16 | 22.58 ± 4.11 | 0.659 | 21.68 ± 2.70 | 22.61 ± 4.32 | 0.018 |
Total leucocyte count (103 cells/dL) [Median (IQR)] | 6,800–11,600 (8,600) | 8,000–14,070 (10,800) | <0.001 | 6,450–9,550 (8,000) | 7,245–13,140 (10,000) | <0.001 |
Serum creatinine (mg/dL) [Median (IQR)] | 0.9–1.6 (1.1) | 1.20–3.0 (1.80) | <0.001 | 0.90–1.30 (1.1) | 0.90–2.30 (1.40) | <0.001 |
Serum urea (mg/dL) [Median (IQR)] | 21–49 (31) | 32–91 (55) | <0.001 | 22.50–46.50 (29) | 24.50–65 (41) | <0.001 |
Serum sodium (mEq/L) (Mean ± SD) | 134.90 ± 6.74 | 130.05 ± 7.94 | <0.001 | 137.49 ± 6.04 | 132.23 ± 7.60 | <0.001 |
Serum potassium (mEq/L) (Mean ± SD) | 4.14 ± 1.59 | 4.09 ± 1.03 | 0.666 | 4.0 ± 0.77 | 4.14 ± 1.47 | 0.238 |
Serum bilirubin (total in mg/dL) [Median (IQR)] | 1.6–6.9 (3.4) | 4.3–18.9 (7.9) | <0.001 | 1.33–4.20 (2) | 2.81–12.60 (5.50) | <0.001 |
Serum albumin (g/dL) (Mean ± SD) | 2.59 ± 0.46 | 2.42 ± 0.45 | <0.001 | 2.86 ± 0.49 | 2.47 ± 0.44 | <0.001 |
INR [Median (IQR)] | 1.46–2.17 (1.76) | 1.81–3.15 (2.37) | <0.001 | 1.29–1.88 (1.53) | 1.63–2.60 (2.04) | <0.001 |
MELD Na+ (Mean ± SD) | 21.72 ± 8.26 | 31.59 ± 7.49 | <0.001 | 17.40 ± 7.93 | 27.0 ± 8.81 | <0.001 |
MELD (Mean ± SD) | 19.43 ± 7.73 | 29.46 ± 8.41 | <0.001 | 16.31 ± 6.82 | 24.59 ± 9.24 | <0.001 |
CTP score (Mean ± SD) | 10.60 ± 1.86 | 12.57 ± 1.59 | <0.001 | 9.51 ± 1.99 | 11.69 ± 1.83 | <0.001 |
ALBI [Median (IQR)] | −0.104–0.350 (0.137) | 0.222–0.618 (0.379) | <0.001 | −0.181–0.180 (−0.037) | 0.084–0.507 (0.292) | <0.001 |
Cox regression analysis of baseline parameters was used for assessment of CTP, MELD, MELD-Na+, and ALBI scores to evaluate the hazards of mortality. Univariate Cox regression analysis showed significant hazards for mortality with increased admission SCr (hazard ratio [HR], 1.118; 95% confidence interval [CI], 1.057–1.182; p < 0.001), decreased serum sodium (HR, 0.979; 95% CI, 0.968–0.991; p < 0.001), and encephalopathy (HR, 0.655; 95% CI, 0.536–0.799; p < 0.001) at three years. Further, admission SCr (adjusted hazard ratio [AHR], 1.082; 95% CI, 1.020–1.148; p = 0.008), serum sodium (AHR, 0.987; 95% CI, 0.976–0.999; p = 0.041), and encephalopathy (AHR, 0.705; 95% CI, 0.574–0.865; p = 0.001) emerged as independent predictors of decreased survival at three years in multivariate analysis. However, serum bilirubin (HR, 1.006; 95% CI, 0.996–1.016; p = 0.227), serum albumin (HR, 0.888; 95% CI, 0.741–1.064; p = 0.197), INR (HR, 1.022; 95% CI, 0.966–1.081; p = 0.448), and ascites (HR, 1.440; 95% CI, 0.947–2.189; p = 0.088) were not significant in predicting mortality at three years (Table 3). These results clearly show that the parameters used for determining ALBI (serum albumin and serum bilirubin) were not efficacious in predicting survival independently. On the contrary, serum creatinine and serum sodium, which are used in the MELD and MELD-Na+ scores, were clearly useful in predicting both short-term and long-term survival.
Table 3Predictors of mortality in patients with ALD at three years (univariate and multivariate Cox regression analysis)
Parameters at admission | p-value | HR (95% CI) |
---|
Three-year survival (univariate Cox regression analysis) |
Serum bilirubin | 0.227 | 1.006 (0.996–1.016) |
Serum albumin | 0.197 | 0.888 (0.741–1.064) |
INR | 0.448 | 1.022 (0.966–1.081) |
Serum creatinine | <0.001 | 1.118 (1.057–1.182) |
Serum sodium | <0.001 | 0.979 (0.968–0.991) |
Ascites | 0.088 | 1.440 (0.947–2.189) |
Encephalopathy | <0.001 | 0.655 (0.536–0.799) |
Three-year survival (multivariate Cox regression analysis) |
Serum creatinine | 0.008 | 1.082 (1.020–1.148) |
Serum sodium | 0.041 | 0.987 (0.976–0.999) |
Encephalopathy | 0.001 | 0.705 (0.574–0.865) |
On comparison of ALBI score levels between survivors and non-survivors, significantly higher ALBI scores were noted in ALD patients who died compared to those who survived during hospitalization (0.464 vs. 0.211; p < 0.001), at 28 days (0.379 vs. 0.137; p < 0.001), 90 days (0.331 vs. 0.063; p < 0.001), six months (0.322 vs. 0.017; p < 0.001), one year (0.316 vs. −0.003; p < 0.001), two years (0.294 vs. −0.041; p < 0.001), and three years (0.287 vs. −0.037; p < 0.001) (Table 4).
Table 4Comparison of ALBI scores between survivors and non-survivors
Total patients (n = 490) | Alive | Dead | p-value |
---|
Hospital mortality alive (n = 387) | −0.051–0.395 (0.211) | 0.238–0.699 (0.464) | <0.001 |
28 days alive (n = 295) | −0.104–0.350 (0.137) | 0.222–0.618 (0.379) | <0.001 |
90 days alive (n = 170) | −0.145–0.305 (0.063) | 0.137–0.544 (0.331) | <0.001 |
6 months alive (n = 137) | −0.163–0.275 (0.017) | 0.127–0.538 (0.322) | <0.001 |
1 year alive (n = 107) | −0.164–0.248 (−0.003) | 0.121–0.533 (0.316) | <0.001 |
2 years alive (n = 84) | −0.167–0.219 (−0.041) | 0.101–0.507 (0.294) | <0.001 |
3 years alive (n = 69) | −0.181–0.180 (−0.037) | 0.084–0.507 (0.287) | <0.001 |