Comparing the pooled cohort equations and coronary artery calcium scores in a symptomatic mixed Asian cohort

Lohendran Baskaran, Jing Kai Lee, Michelle Shi Min Ko, Subhi J. Al’Aref, Yu Pei Neo, Jien Sze Ho, Weiting Huang, Yeonyee Elizabeth Yoon, Donghee Han, Rine Nakanishi, Swee Yaw Tan, Mouaz Al-Mallah, Matthew J. Budoff, Leslee J. Shaw

Research output: Contribution to journalArticlepeer-review

Abstract

Background: The value of pooled cohort equations (PCE) as a predictor of major adverse cardiovascular events (MACE) is poorly established among symptomatic patients. Coronary artery calcium (CAC) assessment further improves risk prediction, but non-Western studies are lacking. This study aims to compare PCE and CAC scores within a symptomatic mixed Asian cohort, and to evaluate the incremental value of CAC in predicting MACE, as well as in subgroups based on statin use. Methods: Consecutive patients with stable chest pain who underwent cardiac computed tomography were recruited. Logistic regression was performed to determine the association between risk factors and MACE. Cohort and statin-use subgroup comparisons were done for PCE against Agatston score in predicting MACE. Results: Of 501 patients included, mean (SD) age was 53.7 (10.8) years, mean follow-up period was 4.64 (0.66) years, 43.5% were female, 48.3% used statins, and 50.0% had no CAC. MI occurred in 8 subjects while 9 subjects underwent revascularization. In the general cohort, age, presence of CAC, and ln(Volume) (OR = 1.05, 7.95, and 1.44, respectively) as well as age and PCE score for the CAC = 0 subgroup (OR = 1.16 and 2.24, respectively), were significantly associated with MACE. None of the risk factors were significantly associated with MACE in the CAC > 0 subgroup. Overall, the PCE, Agatston, and their combination obtained an area under the receiver operating characteristic curve (AUC) of 0.501, 0.662, and 0.661, respectively. Separately, the AUC of PCE, Agatston, and their combination for statin non-users were 0.679, 0.753, and 0.734, while that for statin-users were 0.585, 0.615, and 0.631, respectively. Only the performance of PCE alone was statistically significant (p = 0.025) when compared between statin-users (0.507) and non-users (0.783). Conclusion: In a symptomatic mixed Asian cohort, age, presence of CAC, and ln(Volume) were independently associated with MACE for the overall subgroup, age and PCE score for the CAC = 0 subgroup, and no risk factor for the CAC > 0 subgroup. Whilst the PCE performance deteriorated in statin versus non-statin users, the Agatston score performed consistently in both groups.

Original languageEnglish (US)
Article number1059839
JournalFrontiers in cardiovascular medicine
Volume10
DOIs
StatePublished - Jan 17 2023

Keywords

  • Agatston score
  • coronary artery calcium score
  • major adverse cardiovascular events
  • pooled cohort equation
  • predictive model

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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