Abstract:
BACKGROUND:The Charlson's is the most used comorbidity index. It comprises 19 comorbidities, some of which are infrequent in elderly patients with acute coronary syndrome (ACS), while some others are manifestations of cardiac disease rather than comorbidities. Our goal was to simplify comorbidity assessment in elderly non-ST-segment elevation ACS patients. METHODS:The study group consisted of 1 training (n = 920, 76 ± 7 years) and 1 testing (n = 532; 84 ± 4 years) cohorts. The end-point was all-cause mortality at 1-year follow-up. Comorbidities were assessed selecting those medical disorders other than cardiac disease that were independently associated with mortality by multivariable analysis. RESULTS:A total of 130 (14%) patients died in the training cohort. Six comorbidities were predictive: renal failure, anemia, diabetes, peripheral artery disease, cerebrovascular disease and chronic lung disease. The increase in the number of comorbidities yielded a gradient of risk on top of well-known clinical predictors: ≥3 comorbidities (27% mortality, HR = 1.90, 95% CI 1.20-3.03, p = .006); 2 comorbidities (16% mortality, HR = 1.29, 95% CI 0.81-2.04, p = .30); and 0-1 comorbidities (7.6% mortality, reference category). The discrimination accuracy (C-statistic = 0.80) and calibration (Hosmer-Lemeshow test, p = .20) of the predictive model using the 6 comorbidities was comparable to the predictive model using the Charlson index (C-statistic = 0.80; Hosmer-Lemeshow test, p = .70). Similar results were reproduced in the testing cohort (≥3 comorbidities: 24% mortality, HR = 2.37, 95% CI 1.25-4.49, p = .008; 2 comorbidities: 14% mortality, HR = 1.59, 95% CI 0.82-3.07, p = .20; 0-1 comorbidities: 7.5% reference category). CONCLUSION:A simplified comorbidity assessment comprising 6 comorbidities provides useful risk stratification in elderly patients with ACS.
journal_name
Eur J Intern Medjournal_title
European journal of internal medicineauthors
Sanchis J,Soler M,Núñez J,Ruiz V,Bonanad C,Formiga F,Valero E,Martínez-Sellés M,Marín F,Ruescas A,García-Blas S,Miñana G,Abu-Assi E,Bueno H,Ariza-Solé Adoi
10.1016/j.ejim.2019.01.018subject
Has Abstractpub_date
2019-04-01 00:00:00pages
48-53eissn
0953-6205issn
1879-0828pii
S0953-6205(19)30042-1journal_volume
62pub_type
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