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Identifying patients at low risk for activity-related events: the RARE Score.

Shawn P Lacombe1, Stephen A LaHaye, Diana Hopkins-Rosseel

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The Risk of Activity Related Events (RARE) Score effectively identifies low-risk patients for cardiac rehabilitation exercise. This score enables safer, potentially reduced supervision for exercise training in cardiac rehab programs.

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Area of Science:

  • Cardiology
  • Exercise Physiology
  • Rehabilitation Medicine

Background:

  • Cardiac rehabilitation programs are crucial for patient recovery.
  • Exercise training is a key component of cardiac rehabilitation.
  • Accurate risk stratification is essential for patient safety during exercise.

Purpose of the Study:

  • To evaluate the accuracy of the Risk of Activity Related Events (RARE) Score.
  • To determine if the RARE Score can identify low-risk patients for exercise training in cardiac rehabilitation.
  • To assess the incidence of adverse events in relation to the RARE Score.

Main Methods:

  • Prospective study design.
  • Patients were screened for cardiac rehabilitation entry.
  • The RARE Score classified patients into high-risk (≥4) or low-risk (<4) groups.
  • Adverse events were documented throughout the study period.

Main Results:

  • 656 patients were analyzed; 260 high-risk and 396 low-risk.
  • A low overall event rate was observed (1 event per 1321 patient hours).
  • High-risk patients experienced significantly more adverse events (OR: 4.2) compared to low-risk patients.
  • Over 99% of low-risk patients remained event-free (NPV: 99.2%).

Conclusions:

  • The RARE Score accurately identifies patients at low risk for adverse events during cardiac rehabilitation exercise.
  • This accurate identification may permit reduced on-site supervision.
  • It supports the development of alternative cardiac rehabilitation models, such as community- or home-based programs.