This was due to various reasons such as the lack of data on baseline rates, the differences in baseline rates, the differences and non-uniformity in health and effects reporting, etc. Inclusion of morbidity end points in health impact assessments was however important to estimate the contribution to health effects in terms of the number of attributable cases as well as to the total burden of disease and the cost and benefits of reducing the pollution.
Il était toutefois important d'inclure les indicateurs de morbidité dans les évaluations de l'impact sur la santé pour pouvoir estimer la contribution des concentrations aux effets sur la santé (nombre de cas imputables) ainsi qu'à la charge de morbidité totale et aux coûts et avantages de la réduction de la pollution.