Development and Validation of a Simple-to-Use Nomogram for Predicting 5-, 10-, and 15-Year Survival in Asymptomatic Adults Undergoing Coronary Artery Calcium Scoring

Bríain Ó Hartaigh, Heidi Gransar, Tracy Callister, Leslee J. Shaw, Joshua Schulman-Marcus, Wijnand J. Stuijfzand, Valentina Valenti, Iksung Cho, Jackie Szymonifka, Fay Y. Lin, Daniel S. Berman, Hyuk Jae Chang, James K. Min

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Objectives: The purpose of this study was to develop and validate a simple-to-use nomogram for prediction of 5-, 10-, and 15-year survival among asymptomatic adults. Background: Simple-to-use prognostication tools that incorporate robust methods such as coronary artery calcium scoring (CACS) for predicting near-, intermediate- and long-term mortality are warranted. Methods: In a consecutive series of 9,715 persons (mean age: 53.4 ± 10.5 years; 59.3% male) undergoing CACS, we developed a nomogram using Cox proportional hazards regression modeling that included: age, sex, smoking, hypertension, dyslipidemia, diabetes, family history of coronary artery disease, and CACS. We developed a prognostic index (PI) summing the number of risk points corresponding to weighted covariates, which was used to configure the nomogram. Validation of the nomogram was assessed by discrimination and calibration applied to a separate cohort of 7,824 adults who also underwent CACS. Results: A total of 936 and 294 deaths occurred in the derivation and validation sets at a median follow-up of 14.6 years (interquartile range: 13.7 to 15.5 years) and 9.4 years (interquartile range: 6.8 to 11.5 years), respectively. The developed model effectively predicted 5-, 10-, and 15-year probability of survival. The PI displayed high discrimination in the derivation and validation sets (C-index 0.74 and 0.76, respectively), indicating suitable external performance of our nomogram model. The predicted and actual estimates of survival in each dataset according to PI quartiles were similar (though not identical), demonstrating improved model calibration. Conclusions: A simple-to-use nomogram effectively predicts 5-, 10- and 15-year survival for asymptomatic adults undergoing screening for cardiac risk factors. This nomogram may be considered for use in clinical care.

Original languageEnglish
Pages (from-to)450-458
Number of pages9
JournalJACC: Cardiovascular Imaging
Volume11
Issue number3
DOIs
Publication statusPublished - 2018 Mar

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

Fingerprint Dive into the research topics of 'Development and Validation of a Simple-to-Use Nomogram for Predicting 5-, 10-, and 15-Year Survival in Asymptomatic Adults Undergoing Coronary Artery Calcium Scoring'. Together they form a unique fingerprint.

  • Cite this

    Ó Hartaigh, B., Gransar, H., Callister, T., Shaw, L. J., Schulman-Marcus, J., Stuijfzand, W. J., Valenti, V., Cho, I., Szymonifka, J., Lin, F. Y., Berman, D. S., Chang, H. J., & Min, J. K. (2018). Development and Validation of a Simple-to-Use Nomogram for Predicting 5-, 10-, and 15-Year Survival in Asymptomatic Adults Undergoing Coronary Artery Calcium Scoring. JACC: Cardiovascular Imaging, 11(3), 450-458. https://doi.org/10.1016/j.jcmg.2017.03.018