Short term exposure to air pollution and stroke: systematic review and meta-analysis

To review the evidence for the short term association between air pollution and stroke.

Systematic review and meta-analysis of observational studies DATA SOURCES: Medline, Embase, Global Health, Cumulative Index to Nursing and Allied Health Literature (CINAHL), and Web of Science searched to January 2014 with no language restrictions. ELIGIBILITY CRITERIA: Studies investigating the short term associations (up to lag of seven days) between daily increases in gaseous pollutants (carbon monoxide, sulphur dioxide, nitrogen dioxide, ozone) and particulate matter (