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Results of final model multiple regression analysis total cost per stay as a 'dependent' outcome variable |
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| Number = 764 Variance explained = 0.680 |
Unstandardised coefficients |
Standardised coefficients |
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| Predictors |
B |
Standard error |
Beta |
t |
Significance |
|
|
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| Period (before → after IMC) |
-0.077 |
0.054 |
-0.087 |
-1.420 |
(0.156)a |
| TISS-28 score on 1st day |
0.826 |
0.152 |
0.207 |
5.443 |
(<0.001)a |
| Surgical (no → yes) |
0.183 |
0.024 |
0.207 |
7.714 |
<0.001 |
| LOS in the ICU |
0.025 |
0.001 |
0.688 |
17.307 |
(<0.001)a |
| LOS in ward |
0.016 |
0.002 |
0.616 |
9.940 |
(<0.001)a |
| Primary organ failure (reference category is metabolic) |
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| 1. Metabolic → cardiovascular |
0.066 |
0.076 |
0.070 |
0.871 |
0.384 |
| 2. Metabolic → multitrauma |
0.129 |
0.080 |
0.088 |
1.603 |
0.109 |
| 3. Metabolic → gastrointestinal |
0.143 |
0.086 |
0.064 |
1.667 |
0.096 |
| 4. Metabolic → haematological |
0.324 |
0.125 |
0.066 |
2.589 |
0.010 |
| 5. Metabolic → renal |
0.141 |
0.093 |
0.050 |
1.522 |
0.129 |
| 6. Metabolic → neurologic/neurosurgical |
0.120 |
0.076 |
0.116 |
1.580 |
0.115 |
| 7. Metabolic → respiratory |
0.152 |
0.075 |
0.145 |
2.022 |
0.044 |
| 8. Metabolic → sepsis |
0.081 |
0.085 |
0.039 |
0.955 |
0.340 |
| TISS × period |
0.470 |
0.178 |
0.184 |
2.634 |
0.009 |
| LOS in the ICU × period |
-0.005 |
0.002 |
-0.135 |
-3.161 |
0.002 |
| LOS in ward × TISS-28 |
-0.022 |
0.005 |
-0.289 |
-4.526 |
<0.001 |
| Constant |
3.220 |
0.086 |
37.259 |
<0.001 |
|
|
aP values within brackets should not be taken into account as the predictors involved are also present in an interaction effect. Predictors before the arrow have a score of 0, those after the arrow have a score of 1. In the test, 10log-transformed costs were analysed. ICU, intensive care unit, IMC, intermediate care unit; LOS, length of stay, TISS-28, Therapeutic Intervention Scoring System with a median value of 28. | |||||
Solberg et al. Critical Care 2008 12:R68 doi:10.1186/cc6903 |
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