Table 2.

 Associations from Poisson mixed effects model for C difficile infections

Predictor	Estimated incidence rate ratio (95% CI)	P
Procurement rate
Soap (per mL per bed day)	0.993 (0.990 to 0.996)	<0.0001
Alcohol hand rub (per mL per bed day)	1.010 (1.006 to 1.013)	<0.0001
Improvement team visit (for C difficile infection)
Previous quarters	Reference	—
Quarter before visit	0.97 (0.81 to 1.16)	0.01
Quarter of visit	0.96 (0.79 to 1.15)
Quarter after visit	0.90 (0.74 to 1.10)
Subsequent quarters	0.80 (0.71 to 0.90)
Publication of Health Act 2006	0.75 (0.67 to 0.84)	<0.0001