Table 2.

Transport Only and Transport with APACHE Regression Models

Variable	Transport-Only Model	Transport + APACHE-IV Model
APACHE-IV Probability of Mortality (per 10% increase)	n/a	1.85 [1.78, 1.93]
Time between Arrival and Completion (per 10 minutes)	1.01 [1.00, 1.02]	1.01 [1.00, 1.02]
Arterial Line Placed	1.91 [1.58, 2.31]	0.96 [0.76, 1.22]
Cardiac Assist Device Used	2.49 [0.71, 8.76]	2.26 [0.49, 10.3]
Central Line Placed	3.28 [1.51, 7.10]	2.67 [0.97, 7.33]
Time between Departure and Completion (per 10 minutes)	0.99 [0.98, 1.00]	0.99 [0.98, 1.00]
Time between En-Route and Completion (per 10 minutes)	1.01 [1.00, 1.02]	1.01 [1.00, 1.02]
Intubation	1.80 [1.15, 2.82]	0.64 [0.38,.10]
Mode Completed: Adult Ground	(reference)	(reference)
Mode Completed: Adult Fixed Wing	1.28 [0.67, 2.42]	1.59 [0.76, 3.32]
Mode Completed: Adult Rotor	0.98 [0.77, 1.25]	0.82 [0.61, 1.09]
Mode Completed: Non CCT Transport	0.81 [0.61, 1.07]	1.06 [0.77, 1.47]
Mode Completed: Unknown/Other	1.02 [0.77, 1.36]	1.01 [0.72, 1.42]
Reason for Transport: Unknown	(reference)	(reference)
Reason for Transport: Care Not Available	0.85 [0.64, 1.11]	0.87 [0.62, 1.21]
Reason for Transport: Other	0.97 [0.69, 1.36]	1.08 [0.72, 1.61]
Reason for Transport: Protocol (Autolaunch)	0.86 [0.60, 1.24]	0.59 [0.38, 0.92]
Referring Unit: ED	(reference)	(reference)
Referring Unit: CCU	1.68 [1.10, 2.55]	1.79 [1.10, 2.92]
Referring Unit: ICU	1.64 [1.40, 1.92]	1.35 [1.11, 1.63]
Referring Unit: Other/Unknown	0.82 [0.60, 1.12]	1.05 [0.74, 1.49]

Odds ratios and approximate 95% confidence intervals for effects within a) the model using only predictors obtained from transport encounter data and b) the model using both the APACHE-IV probability of mortality score and the predictors from the transport encounter. The intercept for the transport-only model was −1.826 and the intercept term for the model using both APACHE-IV and transport data was −3.265.