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.

Solberg et al. Critical Care 2008 12:R68   doi:10.1186/cc6903