Abstract
BackgroundPAPRICA is a research program designed to estimate the impact on the health of patients with chronic respiratory insufficiency of a prevention strategy based on notification of ozone pollution. The first year of this study was conducted during the 2003 heat wave, and high temperatures were therefore considered as a confounding factor in the data analysis. The aim of the present study was to assess the relationship between ozone and temperature in order to propose a methodology to distinguish between the effects of ozone and temperature on the impact of a prevention strategy with regard to ozone pollution.MethodsMultivariate analyses were used to identify associated climate and ozone pollution profiles. This descriptive method is of great value to highlight the complexity of interactions between these parameters.ResultsOzone concentration and temperature were strongly correlated, but the health impact of ozone pollution alone will be evaluated by focusing on situations characterized by ozone concentrations above 110 μg/m3/8h (air quality guidelines to protect human health defined by the French legislation) and temperatures lower than 26°C, below the discomfort threshold.ConclusionThe precise relationship between ambient ozone concentration and temperature identified during the PAPRICA 2003 study period will be used in analysing the PAPRICA health data.
Highlights
PAPRICA is a research program designed to estimate the impact on the health of patients with chronic respiratory insufficiency of a prevention strategy based on notification of ozone pollution
Maximum 1- and 8-hour ozone concentrations were recorded in Chartres with 259 μg/m3 and 240 μg/m3 respectively
The highest ozone concentration and temperature and the lowest relative humidity in the three cities were recorded in August during the heat wave
Summary
PAPRICA is a research program designed to estimate the impact on the health of patients with chronic respiratory insufficiency of a prevention strategy based on notification of ozone pollution. In Europe, the public must be informed when ozone concentrations reach a threshold of 180 μg/m3/h (the concept of threshold means in this context the value above which an information is given) This strategy of information is justified by many epidemiological studies which have reported that high levels of ozone in the air are associated with an increase in acute mortality [1,2,3] and morbidity [46]. In the Centre Region of France, these ozone levels are reached or exceeded on average 60 days per year between April and September, but the public does not receive specific information. Within this framework, the network of public health research, PAPRICA, was created in 2002. The impact of this information and prevention strategy on health was assessed through comparative analysis of the medical treatment of the two groups
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