Heart Failure Life Expectancy Calculator (MAGGIC Risk Score)
This calculator uses the MAGGIC (Meta-Analysis Global Group in Chronic Heart Failure) risk score to estimate 1-year and 3-year survival probability for adults living with heart failure. Enter clinical details including age, ejection fraction, NYHA class, systolic blood pressure, kidney function, BMI, and comorbidities. The model was validated in 39,372 patients across 30 international studies. Results are estimates for educational purposes - always discuss prognosis with your cardiologist.
What is the MAGGIC risk score?
The MAGGIC (Meta-Analysis Global Group in Chronic Heart Failure) risk score is a validated clinical tool that predicts the probability of dying within 1 year and 3 years in adults with heart failure. It was developed by Pocock and colleagues (2013) by pooling individual patient data from 39,372 people across 30 international studies, making it one of the largest and most rigorously validated prognostic scores in cardiology. The model uses 13 easily obtained clinical variables - no blood tests beyond creatinine, no expensive imaging beyond echocardiography - so it works in most outpatient settings. It applies equally to heart failure with reduced ejection fraction (HFrEF), mildly reduced ejection fraction (HFmrEF), and preserved ejection fraction (HFpEF).
How is the score calculated?
The MAGGIC score assigns integer points to each of 13 variables and sums them into a single risk score ranging from 0 to 52. Age carries the most points (0-15), with older patients scoring higher, and the penalty is amplified in patients with reduced ejection fraction because low EF at older age compounds risk. Ejection fraction itself adds 0-7 points (EF below 20% = 7 points). Systolic blood pressure and creatinine are scored in bands that also vary with EF category. BMI is scored inversely: lower body weight in heart failure (cardiac cachexia) predicts worse outcomes, so BMI below 15 adds 6 points while obesity (BMI 30 or above) adds none. NYHA Class IV (symptoms at rest) adds 8 points. Among medications, not being on a beta-blocker adds the largest single penalty of 3 points - reflecting the strong survival benefit of this drug class. Absence of ACEi/ARB adds 1 point. Active smoking, diabetes, COPD, and HF diagnosed over 18 months ago each add 1-3 points. The integer total maps to published 1-year and 3-year mortality probabilities from Table 4 of the original paper.
Understanding your EF and NYHA class
Ejection fraction is the percentage of blood the left ventricle pumps out with each beat. A normal EF is 55-70%. Heart failure with preserved EF (HFpEF) is 50% or above; mildly reduced (HFmrEF) is 40-49%; reduced (HFrEF) is below 40%. HFrEF carries more risk and attracts more MAGGIC points at any given age. The New York Heart Association (NYHA) functional class is a symptom severity rating: Class I means no symptoms with ordinary activity; Class II is slight limitation (breathless climbing stairs); Class III is marked limitation (breathless with light activity such as walking on level ground); Class IV is symptoms at rest or with minimal exertion. NYHA class is the single largest source of points after age and is the most easily modifiable - optimal therapy can move patients from Class III to Class II, directly lowering their score.
How to improve your prognosis - what the score tells you
The MAGGIC model shows clearly which factors are modifiable. The most impactful steps are: (1) Starting or optimising a beta-blocker if not already prescribed - absence of a beta-blocker adds 3 points and carries the highest medication penalty in the model. Carvedilol, metoprolol succinate, and bisoprolol all reduce mortality in HFrEF by roughly 30-35% in trials. (2) Starting or optimising an ACE inhibitor or ARB (or upgrading to an ARNI like sacubitril/valsartan). (3) Improving NYHA functional class through medical optimisation, cardiac rehabilitation, and symptom management - each class step carries 2-6 points. (4) Managing creatinine trends by monitoring nephrotoxic medications and treating cardiorenal syndrome early. (5) Addressing modifiable comorbidities - stopping smoking eliminates 1 point and improves lung function. Diabetes and COPD management reduces overall cardiovascular risk. Age and baseline EF are not modifiable, but the treatments above can partly offset them.
MAGGIC Risk Score to Prognosis
| MAGGIC Score | Risk Category | 1-Year Mortality | 3-Year Mortality |
|---|---|---|---|
| 0-5 | Very low | ~1.5-2.9% | ~3.9-7.7% |
| 6-13 | Low (tertile 1) | ~3.3-8.5% | ~8.8-21.5% |
| 14-20 | Intermediate (tertile 2) | ~9.8-21.2% | ~24.3-46.4% |
| 21-30 | High (tertile 3) | ~24-61.7% | ~50.9-88.2% |
| 31-40 | Very high | ~66.8-95.0% | ~90.7-99.2% |
| >40 | Extreme | >96% | >99% |
Approximate 1-year and 3-year mortality by MAGGIC score range. Adapted from Pocock SJ et al., European Heart Journal 2013.
Frequently asked questions
What does the MAGGIC score actually predict?
It predicts the probability that a person with a known heart failure diagnosis will die from any cause within 1 year and within 3 years. These are statistical averages derived from pooled data on 39,372 patients - they describe what happened to groups of similar patients, not what will happen to one individual. A 3-year survival of 60% means that in a large group of patients with the same score, about 60 in 100 were alive at 3 years.
Can the MAGGIC score be used for both HFrEF and HFpEF?
Yes. The model was developed on a mixed population with both reduced and preserved ejection fraction, and it adjusts several scoring tables (age, systolic BP) based on the EF category. Validation studies, including the JAHA 2019 paper by Pocock colleagues, confirm it performs reasonably well across both HFrEF and HFpEF, though C-statistics are slightly lower in HFpEF where pathophysiology is more heterogeneous.
Why does lower blood pressure score more points in heart failure?
In the general population, high blood pressure is dangerous. In heart failure, low systolic blood pressure is a sign of reduced cardiac output and failing ventricular function. Patients with SBP below 110 mmHg in the setting of HFrEF score 5 points compared to 0 points for SBP 150 mmHg or above. This counter-intuitive pattern is a well-established feature of heart failure epidemiology and is captured in the MAGGIC model.
Why does low BMI score more points than obesity?
In heart failure, unintentional weight loss (cardiac cachexia) is a sign of advanced disease and indicates high metabolic demand from the failing heart. Studies consistently show that very low BMI in heart failure predicts worse outcomes. Obesity, by contrast, is associated with a slight survival advantage in chronic heart failure - the so-called "obesity paradox" - likely because obese patients have greater metabolic reserves and present earlier with symptoms. MAGGIC scores BMI below 15 at 6 points and BMI 30 or above at 0 points to reflect this.
Does this calculator apply to acute decompensated heart failure?
No. The MAGGIC score was developed and validated in stable outpatients with a known chronic heart failure diagnosis. It is not validated for use during an acute hospitalisation for decompensated heart failure. Other scoring tools such as the ADHERE or GWTG-HF risk score are better suited to acute or hospitalised presentations.
What recent treatments are not captured by the MAGGIC score?
The MAGGIC model was derived from studies conducted before SGLT2 inhibitors (dapagliflozin, empagliflozin), ARNI therapy (sacubitril/valsartan), and widespread use of mineralocorticoid receptor antagonists were standard. All three drug classes reduce mortality in HFrEF by additional 15-25% in modern trials. This means the MAGGIC score likely overestimates mortality risk in patients who are on contemporary quadruple therapy. Treat the result as a risk indicator, not a precise prediction.
How does creatinine relate to heart failure prognosis?
Creatinine is a marker of kidney function. In heart failure, reduced cardiac output lowers blood flow to the kidneys (cardiorenal syndrome), causing creatinine to rise. Elevated creatinine independently predicts worse outcomes and also limits how aggressively clinicians can dose ACE inhibitors, diuretics, and MRAs - all drugs that improve survival. A creatinine above 250 µmol/L (2.8 mg/dL) adds 8 points - the highest single creatinine penalty.
Sources
- Pocock SJ et al. Predicting survival in heart failure: a risk score based on 39,372 patients from 30 studies. European Heart Journal. 2013;34(19):1404-1413.
- Sartipy U et al. Predicting survival in heart failure: validation of the MAGGIC heart failure risk score in 51,043 patients from the Swedish Heart Failure Registry. European Journal of Heart Failure. 2014;16(2):173-179.