Table 1.

Estimates of parameters in segmented regression model assessing the effect of introducing a chlorine dioxide (275 ppm) disinfectant agent on changing hospital-acquired -methicillin-resistant Staphylococcus aureus incidence rate in Antrim Hospital

Term	Coefficient	95% CIs	p Value
Constant	0.059	0.03 to 0.08	<0.0001
Pre-intervention slope	0.004	0.002 to 0.006	0.006
Level change 12 months after introduction of ClO2-based disinfectant	−0.095	−0.04 to −0.15	0.001
Post-intervention slope	−0.003	−0.005 to −0.001	0.001