Table 1 Descriptive information of patient-level (first level variables) and hospital-level (second level variables) characteristics sample of heart failure patients in Lombardy Region over 2010–2012
Variables | Sample for mortality (72,083) | Sample for readmissions (60,771) | number of 30-day mortality for all causes (9480) | 30-day unplanned readmission (5363) | |
|---|---|---|---|---|---|
Women (n, % of the total) | 37,327 (51.8) | 31,220 (51.4) | 5235 (55.2) | 2797 (52.2) | |
Ward of Admission (n, % of the total) | Cardiologic ward | 17,798 (24.7) | 16,187 (26.9) | 810 (8.5) | 974 (18.1) |
ICU or CCUa | 8196 (11.4) | 7035 (11.6) | 1025 (10.8) | 673 (12.5) | |
Age (years) | Mean (std. dev.) | 77.98 (11.62) | 76.98 (11.73) | – | – |
In-hospital length of stay (days) | Mean (std. dev.) | 10.94 (8.34) | 11.55 (8.19) | – | – |
Number of ED accesses in the previous six months (n, % of the total) | 0 | 52,399 (72.7) | 44,397 (73.1) | 6682 (70.5) | 3681 (68.6) |
1 | 14,276 (19.8) | 11,969 (19.7) | 1949 (20.6) | 1145 (21.3) | |
2+ | 5408 (7.5) | 4405 (7.2) | 849 (8.9) | 537 (10.0) | |
Number of hospitalizations in the previous six months (n, % of the total) | 0 | 56,622 (78.5) | 48,529 (79.8) | 6609 (69.7) | 3893 (72.6) |
1 | 11,707 (16.2) | 9392 (15.4) | 2066 (21.8) | 1053 (19.6) | |
2+ | 3754 (5.2) | 2850 (4.7) | 805 (8.5) | 417 (7.8) | |
Comorbidity Index (Index of − 2 to 12) (n, %) | -2 & -1 (decreasing the possibility) | 3868 (5.4) | 3448 (5.7) | 315 (3.3) | 210 (3.9) |
0 (not causing) | 27,932 (38.7) | 23,748 (39.0) | 3311 (34.9) | 1771 (33.0) | |
1, 2 3, … 12 (increasing the possibility) | 40,283 (55.9) | 33,575 (5.6) | 5854 (61.7) | 3382 (63.0) | |
Mean length of stay (n, %) | 4.5 < LOS < 11.5 | 68,505 (95.03) | 57,678 (94.9) | 9000 (13.14) | 5119 (8.88) |
11.6 < LOS < 18.5 | 2819 (3.91) | 2392 (3.9) | 412 (14.62) | 205 (8.57) | |
18.6 < LOS < 25.5 | 554 (0.76) | 514 (0.8) | 44 (7.94) | 27 (5.25) | |
Percentage of Surgical Hospitalizations | Mean (std. dev.) | 26.68 (15.34) | 26.68(15.34) | – | – |
Percentage of transfer from other local health agencies | Mean (std. dev.) | 0.18 (0.13) | 0.18 (0.13) | – | – |
Percentage of transfer from other Regions | Mean (std. dev.) | 0.07 (0.06) | 0.07 (0.06) | – | – |
Type of structure (patients) | Public (n, %) | 57,514 (79.79) | 48,220 (79.35) | 8025 (11.13) | 4401 (7.24) |
Research (n, %) | 7787 (12.46) | 6862 (13.03) | 787 (1.26) | 543 (1.03) | |