Table 2.

Parameters Included in a Prediction Model^a for Transmission of Methicillin-Resistant Staphylococcus aureus in Nursing Homes, United States, 2012–2016

Parameter	β Coefficient From Development Modelb
Intercept	−1.42
Use of any medical device	0.59
Chronic skin breakdownc	0.21
Dependency on HCWd	0.61
Diabetes mellitus	0.06
Male sex	0.54
White race	−0.94

Abbreviation: HCW, health-care worker.

^a The model was developed among residents of community-based nursing homes recruited from March 26, 2012, to May 1, 2014 (development set) and applied to residents of Department of Veterans Affairs–based nursing homes recruited from September 19, 2012, to January 6, 2016 (validation set).

^b The logit of the probability that a resident would transmit methicillin-resistant Staphylococcus aureus to an HCW was estimated by summing the β coefficients from the model (including the intercept) multiplied by the value of each variable for each resident. The risk of transmission for each resident was then calculated as 1/(1 + e^−logit).

^c Any type of skin breakdown, excluding surgical wounds.

^d Dependency on an HCW was defined as having a dependency score of 3 (requiring extensive assistance) or 4 (total dependence) for any of the following activities: dressing, hygiene, toileting, or transfer.