Table 2. GLM Regression Results Examining Emergency Department Wait Times.

	Beta	SE	95% CI	P
Patient Characteristics
Age
Less than 18	−0.20	0.05	−0.30 - −0.10	0.000
18 to 44	−0.06	0.04	−0.14 - 0.01	0.091
44 to 64 (ref.)	0.00
Female	−0.02	0.04	−0.10 - 0.07	0.672
Race
White (ref.)	0.00
Non-White	0.06	0.03	0.00 - 0.11	0.050
Race Not Specified	0.15	0.10	−0.04 - 0.35	0.124
Habits/Co-morbidities
Smoking	−0.12	0.05	−0.21 - −0.02	0.013
Alcohol	0.17	0.09	−0.01 - 0.36	0.067
Number of co-morbidities	0.07	0.04	−0.01 - 0.15	0.082
Injury Characteristics
ISS Score	−0.01	0.00	−0.02 - 0.00	0.032
Multiple Digit	0.16	0.10	−0.05 - 0.36	0.130
Thumb	−0.17	0.03	−0.23 - −0.10	0.000
Insurance
Private (ref.)	0.00
Public	0.10	0.05	0.00 - 0.20	0.057
No Insurance	0.12	0.04	0.05 - 0.20	0.002
Other Insurance	0.38	0.26	−0.12 - 0.88	0.140
Insurance Not Specified	0.88	0.40	0.10 - 1.66	0.026
Hospital Characteristics
Bed Size
Less than 200 (ref.)	0.00
200-400	−0.14	0.11	−0.35 - 0.07	0.178
401-600	−0.04	0.12	−0.27 - 0.19	0.744
More than 600	−0.17	0.12	−0.40 - 0.07	0.163
Trauma Center Level
Other Hospitals (ref.)	0.00
Level I	0.28	0.09	0.11 - 0.45	0.001
Level II	−0.08	0.09	−0.25 - 0.08	0.327
Level III	−0.18	0.11	−0.39 - 0.04	0.104
Status
For-Profit (vs. Public)	0.07	0.13	−0.17 - 0.32	0.558
Non-Teaching (vs. Teaching)	0.20	0.10	0.01 - 0.39	0.038
Geography
Midwest (ref.)	0.00
Northeast	−0.20	0.11	−0.42 - 0.02	0.074
South	0.05	0.08	−0.11 - 0.21	0.532
West	0.01	0.15	−0.27 - 0.30	0.933
Intercept	5.20	0.12	4.96 - 5.43	0.000

N=12,126; AIC=12.75; Adjusted for 586 clusters in hospitals.

Source: The 2007 – 2012 National Trauma Data Bank.