Table 2.
Means, standard deviations, and numbers of patients for hospital cost, also broken down for some relevant factors (n = 786)
| Costs | Pre-IMC period | IMC period | P value | P value interaction | ||
| Number | Mean (SD) | Number | Mean (SD) | |||
| Total hospital stay | 329 | 12.961 (14.530) | 457 | 16.513 (19.324) | 0.01 | |
| ICU stay | 329 | 10.017 (13.317) | 457 | 13.020 (17.659) | 0.07 | |
| IMC stay | 0 | - | 143 | 2.612 (4.060) | - | |
| General ward stay | 236 | 4.105 (5.924) | 304 | 4.065 (5.095) | 0.83 | |
| LOS in the ICU of <1 week | 155 | 5.738 (5.028) | 231 | 6.965 (5.922) | 0.11 | |
| LOS in the ICU of >1 week | 174 | 19.396 (17.010) | 226 | 26.272 (23.058) | <0.001 | 0.13 |
| LOS in ward of <1 week | 177 | 9.734 (11.125) | 240 | 13.533 (18.476) | 0.01 | |
| LOS in ward of >1 week | 152 | 16.719 (14.045) | 217 | 19.808 (19.743) | 0.35 | 0.22 |
| Readmissions to ICU | 21 | 27.326 (18.558) | 38 | 30.818 (5.627) | 0.44 | |
| Non-readmissions to ICU | 308 | 12.130 (13.849) | 419 | 17.499 (847) | 0.02 | 0.99 |
| Surgical patients | 175 | 14.586 (14.162) | 277 | 18.091 (18.483) | 0.06 | |
| Non-surgical patients | 154 | 11.115 (14.766) | 180 | 14.085 (20.365) | 0.31 | 0.79 |
| Deceased in hospital | 77 | 14.444 (18.540) | 129 | 18.292 (19.970) | 0.10 | |
| Non-deceased in hospital | 252 | 12.509 (13.073) | 328 | 15.813 (19.049) | 0.06 | 0.47 |
| TISS score on 1st day < median | 165 | 9.770 (11.125) | 220 | 10.608 (13.140) | 0.62 | |
| TISS score on 1st day > median | 149 | 17.112 (17.138) | 230 | 22.514 (22.450) | 0.01 | 0.14 |
The P value concerns the differences between pre-IMC and IMC periods. The P value interaction tests whether the differences of studied relevant factors change from the pre-IMC period to the IMC period. In both tests, 10log-transformed costs were analysed. ICU, intensive care unit; IMC, intermediate care unit; LOS, length of stay; SD, standard deviation; TISS, Therapeutic Intervention Scoring System.