Table 3 The numbers of deaths and lengths of stay in the ICU and the hospital. Categorical data are expressed as numbers with percentages (%) and were tested using the chi-squared test. Mean and interquartile ranges are provided for the length of stay, and they were tested using the analysis of variance for before-matching data and the Friedman test for after-matching data. ICU, intensive care unit; IQR, interquartile range
| Â | Before matching | After matching | ||||||
|---|---|---|---|---|---|---|---|---|
Period | High-former | Low-mid | High-latter | p-value | High-former | Low-mid | High-latter | p-value |
n | 251 | 213 | 498 | Â | 200 | 200 | 200 | Â |
Death (%) | ||||||||
 ICU | 12 (4.78) | 10 (4.69) | 18 (3.61) | 0.68 | 10 (5.00) | 9 (4.50) | 5 (2.50) | 0.40 |
 Hospital | 54 (21.5) | 40 (18.8) | 89 (17.9) | 0.49 | 49 (24.5) | 35 (17.5) | 35 (17.5) | 0.13 |
Length of stay [IQR] | ||||||||
 ICU | 3.18 [1, 4] | 3.88 [1, 5] | 3.52 [1, 4] | 0.09 | 3.47 [1, 4] | 3.88 [1, 5] | 3.30 [1, 4] | 0.17 |
 Hospital | 30.5 [12, 44] | 34.0 [12, 46] | 32.2 [11, 41] | 0.51 | 32.7 [13, 47] | 33.7 [13, 45] | 32.8 [12, 42] | 0.39 |