Narendra Punati, Raghavender Raju. Seventh Sense Research Group.
Do not use it for the evaluation of one-day events or competitions such as walking or cycling days etc. HEAT calculations are based on mortality rates for the age ranges of 20—74 years for walking and 20—64 years for cycling.
HEAT should not be applied to populations of children or adolescents, since the scientific evidence used by HEAT does not include these age groups. The upper age boundaries have been set by consensus to avoid inflating health benefits from misrepresenting active travel behaviour among older age groups that have higher mortality risks.
If the assessed population is considerably younger or older than average, the user can specify a lower or higher age range. HEAT applies evidence from studies in the general population and not in subpopulations with very high average levels of physical activity, such as bicycle couriers or mail personnel.
Although the exact shape of the dose—response curve is uncertain, benefits from physical activity seem to start to slow above levels equivalent to perhaps 1. The tool is therefore not suited for populations with average levels of cycling of about 1.
Most of the studies on health effects of cycling and walking and of air pollution used for HEAT have been carried out in environments with low or medium levels of air pollution i.
It seems that negative effects from air pollution start to level off at higher levels and effects on cyclists and pedestrians have not yet been well studied at such levels of exposure.
Knowledge of the health effects of walking and cycling is constantly evolving. The HEAT project is an ongoing consensus-based effort of translating basic research into a harmonized methodology.
Despite relying on the best available scientific evidence, on several occasions the tool methodology required the advisory groups see acknowledgements to make expert judgements.
The most important assumptions underlying the HEAT impact assessment approach are described here. Therefore, the accuracy of results of the HEAT calculations should be understood as estimates of the order of magnitude, much like many other economic assessments of health effects. HEAT is regularly being updated as new knowledge becomes available.
The HEAT tool is composed of 5 main steps: Depending on the characteristics of an assessment, a varying number of questions will apply.impact of the risk factor in population.
The population attribution function helps to estimate which factor has a stronger impact on cardiovascular health in the population.
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