title: Tread carefully with stepwise regression.
authors.forename: Edward
authors.initials: E
authors.lastname: Livingston
authors.forename: Jing
authors.initials: J
authors.lastname: Cao
authors.forename: Justin B
authors.initials: JB
authors.lastname: Dimick
mesh_terms: D003428:Cross Infection / Q000209:etiology*; D006801:Humans; D007442:Intubation, Intratracheal / Q000009:adverse effects*; D016015:Logistic Models; D053717:Pneumonia, Ventilator-Associated / Q000209:etiology*; D013997:Time Factors