Abstract:
BACKGROUND:The Child-Turcotte-Pugh (CTP) score is a widely used and validated predictor of long-term survival in cirrhosis. However, the cutpoints for stratifying laboratory variables in CTP have never been validated. OBJECTIVE:The objective of this study was to identify evidence-based cutpoints for the CTP laboratory subscores to improve its predictive capacity for transplant-free survival. DESIGN:Retrospective observational study. DATA SOURCE:Using a cohort of 30,897 cirrhotic US Veteran patients with at least 5 years of follow-up, we performed Cox proportional hazard survival model iterations varying the upper and lower cutpoints for INR, total bilirubin and albumin CTP subscores. Cutpoints yielding the highest Harrell's C-statistics for concordance with transplant-free survival were incorporated into a modified CTP (mCTP) score. Validation of the mCTP was performed at multiple time frames within the follow-up period of the cohort and within subsets defined by disease etiology. RESULTS:Modification of CTP cutpoints increased the Harrell's C-statistic for age- and gender-adjusted Cox proportional hazard models from 0.701 ± 0.002 to 0.709 ± 0.002 and the risk ratio per unit change from 1.49 (1.48-1.50) to 1.53 (1.52-1.54). The modified cutpoints showed superiority in predicting 5-year transplant-free survival in various disease etiology subgroups. A mCTP substituting serum creatinine for INR performed superiorly for predicting 5-year transplant-free survival. CONCLUSION:We propose an evidence-based recalibration of CTP score cutpoints that optimizes this model's capacity to predict transplant-free survival in patients with cirrhosis. The CTP score remains the best predictor of 5-year overall and transplant-free survival in patients with cirrhosis.
journal_name
Dig Dis Scijournal_title
Digestive diseases and sciencesauthors
Kaplan DE,Dai F,Skanderson M,Aytaman A,Baytarian M,D'Addeo K,Fox R,Hunt K,Knott A,Mehta R,Pedrosa M,Pocha C,Valderrama A,Taddei T,VOCAL Study Group.doi
10.1007/s10620-016-4239-6subject
Has Abstractpub_date
2016-11-01 00:00:00pages
3309-3320issue
11eissn
0163-2116issn
1573-2568pii
10.1007/s10620-016-4239-6journal_volume
61pub_type
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