The burden of unhealthy behaviours

Project Big Life – Life expectancy calculator based on Canadian community health surveys. The calculator bases their predictions on your (truthful) answers to their questions on diet, exercise and a few other factors.

What Do These Findings Mean?

  • Unhealthy behaviours contribute to a large burden of reduced life expectancy.
  • Linked population health surveys create an opportunity to estimate burden of disease using individual-based data, as in our multivariable predictive approach, and to supplement existing aggregate approaches.
  • Multivariable risk algorithms can be validated and calibrated for potential application in over 100 countries, potentially allowing widespread use of multivariable approaches.
  • Multivariable risk algorithms are more complex than alternative approaches to measure burden from health behaviours, but their use can be facilitated by reporting the algorithm in machine-readable format ( and/or by providing online calculators (

My life expectancy is 87 years, with my health age being 31 years. Not bad for a 37 year old?