Study objective: To evaluate if the effects of particulate matter (PM 10 ) on respiratory mortality of elderly people are affected by socioeconomic status. Design: Time series studies. The daily number of elderly respiratory deaths were modelled in generalised linear Poisson regression models controlling for long term trend, weather, and day of the week, from January 1997 to December 1999, in six different regions of São Paulo City, Brazil. The regions were defined according to the proximity of air pollution monitoring stations. Three socioeconomic indicators were used: college education, monthly income, and housing. Main results: For a 10 mg/m 3 increase in PM 10 , the percentage increase in respiratory mortality varied from 1.4% (95% CI 5.9 to 8.7) to 14.2% (95% CI 0.4 to 28.0). The overall percentage increase in the six regions was 5.4% (95% CI 2.3 to 8.6). The effect of PM 10 was negatively correlated with both percentage of people with college education and high family income, and it was positively associated with the percentage of people living in slums. Conclusions: These results suggest that socioeconomic deprivation represents an effect modifier of the association between air pollution and respiratory deaths.

Prática clínica dos enfermeiros na prevenção da infeção associada ao cateter venoso centralNurses' clinical practice for the prevention of central venous catheter-related infections Práctica clínica de los enfermeros en la prevención de la infección asociada al catéter venoso central REVISTA DE ENFERMAGEM REFERÊNCIA homepage: https://rr.esenfc.pt/rr/ ISSNe: 2182.2883 ARTIGO DE INVESTIGAÇÃO (ORIGINAL)