Changes in incidence of MRSA in three different phases of intervention.

Note. Phase 1: baseline observation period; phase 2: launch of the first intervention - hand hygiene campaign; phase 3: continuation of phase 2 plus launch of the second intervention - contact precautions;
1Insignificant change in trend in Phase 2 vs Phase 1 was found for all models, implying the same slope within Phases 1 and 2;
2IRR denotes incidence rate ratio obtained from segmented Poisson regression, and CI denotes confidence intervals;
3Percentage change in incidence rate obtained from (IRR−1)×100%; NS, not significant.