![]() Independent living was predicted by PTA extending into the 8th week after injury. ![]() One-year employment and global outcomes were predicted by PTA extending into week 4 after injury. At 1 year, PTA that extended into week 7 after injury predicted total FIMâ„¢ and FIMâ„¢ sub-scales. Results: A single threshold value of PTA days was identified for all variables. The area under the ROC curve and percentage correct classification were also calculated to discriminate classification accuracy and choose the best predictive thresholds. Classification and regression tree analysis then determined whether multiple threshold values existed. Logistic regression was used to determine whether a single predictive threshold value existed. ![]() Research design: Using the TBI Model System database (n 5250), the duration of PTA that predicts 1-year outcomes was calculated. Primary objective: To consider the duration of post-traumatic amnesia (PTA) as a single predictor variable to determine whether categories of PTA duration exist that predict 1-year outcomes after traumatic brain injury (TBI).
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