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Cox proportional hazard models showed that Charlson Comorbidity Index (CCI) and unknown partner status were associated with a decrease in survival (P .01 and P = .05, respectively). Additionally, patient age, gender, race, CCI, and body mass index were not independently associated with changes in survival. Late and non-percutaneous tracheostomies were associated with more tracheostomy-related deaths, but timing and technique were not associated with differences in patient survival. Multiple regression analysis showed that increased