This study, published in 2005, was conducted to determine whether applying the CSA (Canadian Standards Association) playground standards and replacing unsafe playground equipment with safe equipment reduced the number of playground injuries.
The study found that the CSA standards were an effective tool in identifying hazardous playground equipment, and that removing and replacing the unsafe equipment is an effective strategy for preventing playground injuries.
Reference: Howard, A. W., MacArthur, C., Willan, A., Rothman, L., Moses-McKeag, A., & MacPherson, A. K. (2005). The effect of safer play equipment on playground injury rates among school children. Canadian Medical Association Journal, 172(11), 1443-1446.