[Impact of the new smoke-free legislation (law 42/2010) on levels of second-hand smoke in hospitality venues].

Objective: To evaluate pollution by second-hand smoke in a sample of hospitality venues before and after the implementation of smoke-free legislation.

Methods: A cross sectional, before-after study was conducted in 2008 and 2011 after the total ban. A SidePack Aerosol monitor was used both inside and outside the hospitality venues to measure fine breathable particles (PM2.