As we can see, particulates have been among the most studied pollutants. In the next two tables a summary of results from some of the most important studies is showed.

Estimates of the association are presented as the per cent increase in the correspondent health end point per:

an increase in 10m g/m3 in PM10 for the acute exposures, and

an increase in 5m g/m3 in PM2.5 for chronic exposures

Adapted from Pope and Dockery (1999), with addition of results from recent multicenter studies:

a: Dominici et al (2002b); b: Katsouyanni et al. (2001); c: Stieb et al. (2002); d: Samet et al. (2000a); e: Biggeri et al. (2001), f: Atkinson et al (2001b), g: Le Tertre et al. (2002), h: Samet et al. (2000c), i: Pope et al (2002).