Table 2 |
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|
Results of the multivariate models for hospital length of stay and total hospital cost |
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|
Predictor |
Hospital Length of Stay |
Total Hospital Cost |
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|
|
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|
Coefficient |
Impact of Factor (Percent Change on Outcome†) |
p value |
Coefficient |
Impact of Factor (Percent Change on Outcome†) |
p value |
|
|
|
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|
Admission Delay > 12 hrs (no = 0, yes = 1) |
0.117 |
12.4% (6.6 - 18.5) |
< .0001 |
0.104 |
11.0% (6.0 - 16.4) |
< .0001 |
|
CTAS 1 - Resuscitation* |
-0.084 |
-8.0% (-16.2 - 0.91) |
0.0768 |
0.32 |
37.6% (26.9 - 49.3) |
< .0001 |
|
CTAS 2 - Emergent* |
0.0044 |
0.44% (-3.7 - 4.7) |
0.84 |
0.079 |
8.2% (4.3 - 12.3) |
< .0001 |
|
CTAS 4 - Less Urgent* |
-0.033 |
-3.3% (-8.9 - 2.7) |
0.27 |
-0.055 |
-5.3% (-10.2 - -0.21) |
0.04 |
|
CTAS 5 - Non-Urgent* |
-0.41 |
-33.8 (-57.6 - 3.9) |
0.07 |
-0.51 |
-40% (-59.4 - -10.9) |
0.011 |
|
Arrival by Ambulance (no = 0, yes = 1) |
0.12 |
12.9% (8.7 - 17.3) |
< .0001 |
0.168 |
18.3% (14.4 - 22.3) |
< .0001 |
|
Sex (male = 0, female = 1) |
-0.077 |
-7.4% ( -10.6 - -4.1) |
< .0001 |
-0.041 |
-4.0% (-6.9 - -1.0) |
0.009 |
|
Admit to ICU or OR ( no = 0, yes = 1) |
-156 |
-14.5% (-19.1 - -9.6) |
< .0001 |
0.19 |
21% (15.2 - 27.0) |
< .0001 |
|
Age (years) |
0.011 |
1.1% (1.0 - 1.2) |
< .0001 |
0.0088 |
0.9% (0.8 - 1.0) |
< .0001 |
|
Age2 (years2) |
0.0000072 |
0.00072% (-0.004 - 0.005) |
0.75 |
-0.000028 |
-0.003% (-0.007 - 0.001) |
0.17 |
|
Site of ED |
0.037 |
3.8% (0.2 -7.6) |
0.04 |
0.038 |
3.9% (0.7 - 7.2) |
0.016 |
|
CMGs 001-901 |
Included in model to adjust for the effects of disease conditions; individual values are not shown |
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|
|
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|
* CTAS 3 -Urgent is the reference group † Converted from the lognormal model to percentage impact by taking Exp(coefficient value); e.g., Exp(0.117) = 1.124, which corresponds to a 12.4% increase in hospital LOS associated with admission delay > 12 hours. |
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|
Huang et al. BMC Emergency Medicine 2010 10:16 doi:10.1186/1471-227X-10-16 |
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