Figure 2. Functional Outcome Without Severe Disability 6 Months After Admission in Predesignated Subgroups According to Early or Standard Tracheostomy Timing.

Odds ratios in prespecified subgroups for reaching an acceptable modified Rankin Scale score of 0 to 4 at 6 months in the early vs standard tracheostomy groups (see Table 1 footnotes for score definitions). The dashed vertical line indicates the point of no difference between the groups. The overall P value is the result of testing the treatment group effect in the primary analysis model. Other P values were obtained by testing an interaction between treatment group and the respective variables of interest in slightly modified versions of the primary analysis model.

Scores on the Glasgow Coma Scale range between 3 and 15 points, with lower scores indicating reduced levels of consciousness. It is composed of best eye response, best verbal response, and best motor response.