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Life Expectancy Calculator with Medical Conditions | Longevity Engine
A chronic condition raises your yearly risk of death by a hazard ratio. Enter your age, sex and how much your condition raises that risk. The calculator converts it into remaining years, using Statistics Canada life tables and the same Gompertz mortality model behind our main calculator.
Why you can't just divide by the hazard ratio
Mortality risk roughly doubles every 8 years of adult life. That's the Gompertz law. So a condition that doubles your yearly risk has about the same effect as being several years older. It doesn't halve your remaining life. Simple calculators that divide remaining years by the hazard ratio greatly overstate the impact, especially for younger people.
What the research says about common conditions
- Heart failure: roughly half of people diagnosed with heart failure die within five years of diagnosis, though outcomes vary widely with ejection fraction, age and treatment (Roger, Circulation Research, 2013). Validated tool: Seattle Heart Failure Model.
- COPD: combining body-mass index, airflow obstruction, breathlessness and exercise capacity (the BODE index) predicts the risk of death better than lung function alone (Celli et al., NEJM, 2004).
- Chronic kidney disease: lower eGFR and higher urine albumin are each independently linked to higher all-cause mortality (CKD Prognosis Consortium, The Lancet, 2010).
- Dementia: in a large UK population cohort, median survival after onset was roughly four to five years, longer for those diagnosed younger (Xie, Brayne & Matthews, BMJ, 2008).
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Frequently Asked Questions
How is life expectancy calculated with a medical condition?
Start with the remaining life expectancy for your age and sex from Statistics Canada life tables. A chronic condition multiplies your yearly risk of death by a hazard ratio. Because mortality risk also rises exponentially with age (the Gompertz law), the calculator recomputes the whole survival curve with the higher risk instead of simply dividing your remaining years.
What hazard ratio should I choose for my condition?
It depends on the condition, its stage and how well it is treated, so we don't assign one number per disease. Condition-specific tools like the Seattle Heart Failure Model or the BODE index, or your own physician, can tell you how much your risk is raised. Then use the calculator to see what that means in years.
Does a hazard ratio of 2 cut my remaining life expectancy in half?
No. Doubling your yearly risk takes away fewer years than halving would, because risk already doubles roughly every 8 years with age. In this model, doubling the risk at a given age costs about the same as being several years older.
Sources
- Statistics Canada. Life Tables, Canada, Provinces and Territories, 2020 to 2022.
- Roger VL. Epidemiology of Heart Failure. Circulation Research, 2013.
- Levy WC, et al. The Seattle Heart Failure Model. Circulation, 2006.
- Celli BR, et al. The BODE index in chronic obstructive pulmonary disease. New England Journal of Medicine, 2004.
- Chronic Kidney Disease Prognosis Consortium (Matsushita K, et al.). The Lancet, 2010.
- Xie J, Brayne C, Matthews FE. Survival times in people with dementia. BMJ, 2008.
Results are statistical estimates based on population-level research, not individualized medical advice. Consult a qualified healthcare professional before making health decisions.