Functional Exercise Capacity (METs — Metabolic Equivalents)

Good: ≥ 10 METs (brisk activity, sports — 0 pts)+0Moderate: 4–9 METs (climb stairs, walk 4 mph — 1 pt)+1Poor: < 4 METs (unable to climb 1 flight, walks slowly — 3 pts)+3

Revised Cardiac Risk Index (RCRI) Score

RCRI 0 — no cardiac risk factors (0 pts)+0RCRI 1–2 — low cardiac risk (1 pt)+1RCRI ≥ 3 — elevated cardiac risk (3 pts)+3

Pulmonary Disease Burden

No pulmonary disease or mild/controlled asthma (0 pts)+0Moderate COPD (GOLD II) or moderate asthma (FEV₁ 50–79%) (1 pt)+1Severe/very severe COPD (GOLD III–IV), FEV₁ < 50%, or oxygen-dependent (3 pts)+3

Renal Function

eGFR ≥ 60 — normal/mildly reduced (0 pts)+0eGFR 30–59 — moderately reduced (1 pt)+1eGFR < 30 (CKD stage 4–5) or dialysis-dependent (2 pts)+2

SCARF Score — Systematic Cardiovascular and Respiratory Fitness Score

SCARF Score — Systematic Cardiovascular and Respiratory Fitness Score