Table 1 Patient characteristics of the total study population, the patients of whom all information was available in the database (complete cases), the patients with missing data (incomplete cases) and the differences between these two groups
Patient characteristic [n missing] | Total population | Complete cases | Incomplete cases | p value for difference between complete and incomplete cases |
|---|---|---|---|---|
N | 3920 | 2855 | 1065 | |
Age [0] | 84 [81–87] | 84 [81–87] | 84 [81–86] | 0.738 |
Sex [0] | 2051 (53%) | 1532 (54%) | 519 (51%) | 0.072 |
IQCODE [922] | 3 [3, 4] | 3 [3, 4] | 3 [3, 4] | 0.681 |
Chronic comorbidities [6] | 4 [3–6] | 4 [3–6] | 4 [3–6] | 0.703 |
Drugs daily [7] | 6 [4–9] | 6 [4–9] | 6 [4–9] | 0.732 |
CPS [7] | 10 [7–14] | 10 [7–14] | 11 [7–14] | 0.633 |
CFS 1–3 [17] | 1544 (39%) | 1170 (41%) | 374 (35%) | 0.011 |
CFS 4–5 | 1314 (34%) | 936 (33%) | 378 (35%) | |
CFS 6–9 | 1045 (27%) | 749 (26%) | 296 (28%) | |
Katz [433] | 6 [4–6] | 6 [4–6] | 6 [4–6] | 0.952 |
SOFA [11] | 6 [4–9] | 6 [4–9] | 6 [3–9] | 0.94 |
intubated [0] | 1943 (50%) | 1429 (50%) | 514 (50%) | 0.941 |
tracheostomy [10] | 264 (7%) | 201 (7%) | 63 (6%) | 0.37 |
vasoactive medication [0] | 2326 (59%) | 1741 (61%) | 585 (57%) | 0.019 |
RRT [0] | 424 (11%) | 338 (12%) | 86 (8%) | 0.002 |
NIV [0] | 881 (23%) | 669 (24%) | 212 (21%) | 0.065 |
withhold [0] | 1140 (29%) | 893 (31%) | 246 (23%) | < 0.001 |
withdraw [0] | 545 (14%) | 404 (14%) | 141 (14%) | 0.746 |
survived to icu discharge [14] | 2729 (72%) | 2033 (72%) | 759 (74%) | 0.06 |
survived up to 30 days [74] | 2293 (58%) | 1648 (58%) | 545 (64%) | < 0.001 |
survived up to 6 months [644] | 1398 (36%) | 1345 (47%) | 53 (6%) | < 0.001 |