Document Classification

Section Type: RESULTS

Text: Changes in mean fine and coarse PM (PM (2. 5) and PM (2. 5-10)) concentrations (baseline to 6 months) were significantly lower in both air cleaner groups compared with the control group (mean differences for PM (2. 5) concentrations : control, 3. 5 g/m (3) ; air cleaner only, -19. 9 g/m (3) ; and air cleaner plus health coach, -16. 1 g/m (3) ; P =. 003 ; and PM (2. 5-10) concentrations : control, 2. 4 g/m (3) ; air cleaner only, -8. 7 g/m (3) ; and air cleaner plus health coach, -10. 6 g/m (3) ; P =. 02).