How old are you, really? Communicating chronic risk through 'effective age' of your body and organs
Spiegelhalter · 2016 · BMC Medical Informatics and Decision Making 16:104
What this work gives Aellic
Effective age: with a log-linear baseline hazard, an exposure with hazard ratio HR corresponds to ln(HR) divided by the per-year log hazard of age, about 10 × ln(HR) when the hazard rises by roughly 1.1 per year from age 30. Valid only under proportional hazards and a hazard that rises exponentially with age. Summing several effects is only safe for mutually adjusted estimates or clearly distinct exposures, and the author warns against claiming that behaviour change takes years off without randomised evidence. Read in full text (open access).
Where this sits in the engine
This work is on the register, but nothing computes with it today, mostly because the feature it belongs to has not been built yet. It is listed so the numbers on the overview do not claim more than they carry.