estimates for TW and non-TW combined.

Phase-specific estimates for the daily probability of a susceptible patient acquiring MRSA from an MRSA positive patient in the same ward, for ICU 1 and ICU 2 (without distinguishing between TW and non-TW strains). In the Combined row, the estimates are constrained to be the same in both wards, and the All phases column constrains the estimates to be the same in the four phases.
1P-values test the null hypothesis that transmission does not vary between study phase (likelihood ratio test, df = 3).
2P-values test the null hypothesis that transmission in the current phase does not differ between wards (likelihood ratio test, df = 1).