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Table 1 List of parameters for MRSA transmission among high-risk and low-risk patients via HCWs

From: Effects of the proportion of high-risk patients and control strategies on the prevalence of methicillin-resistant Staphylococcus aureus in an intensive care unit

Description Symbol(s) Value(s) References
Proportion of high-risk patients θ 0.5,[0,1] [39]
Proportions of colonized patients in the high-risk and low-risk groups at admission λCH,λCL 0.2, 0.05 [40]
Proportions of infected patients in the high-risk and low-risk groups at admission λIH,λIL 0.01, 0 [41]
Discharge rates of uncolonized and colonized patients in the γH,γL high-risk and low-risk groups 1/9,1/5 [29, 42, 43]
Probabilities of developing an MRSA infection in high-risk and low-risk patients pH,pL 0.2, 0.05 [41, 44]
Treatment rates for high-risk and low-risk patients νH,νL 1/10,1/5 [45]
Probabilities of MRSA-related death in high-risk and low-risk patients dH,dL 0.3, 0.15 [14, 39, 46]
Total numbers of patients Np 48  
Ratio of patients to HCWs r 4 [39]
Decontamination rate in HCWs η 24 [13]
Per capita contact rate c 1.38 [30]
Probability of successful colonization q 0.01 [13, 31]
Probability of successful contamination for colonized and infected patients qC,qI 0.17, 0.25 [13, 32]
Transmission coefficient from contaminated HCWs to uncolonized patients β cqNp  
Transmission coefficients from colonized and infected patients to uncontaminated HCWs αC,αI cqCNp,cqINp  
Control factor for targeted measures on high-risk patients σ 0.5,[0,1] varying
Control factor for targeted measures on infected patients κ 0.5,[0,1] varying