Background
Methods
Study design
Study population/setting
Surgical complexity
Co-morbidity measures
Main outcome measures
Statistical analyses
Results
Total discharges by procedure complexity
Discharges with procedures | ||||||||
---|---|---|---|---|---|---|---|---|
QTR s | Non-surgical | STAND | INT.M | CO | Un-assigned | Total procedures | No procedure | Total procedures |
QTR 1 | 19368 | 24479 | 25117 | 2568 | 4172 | 75704 | 96561 | 172265 |
R% | (11.2) | (14.2) | (14.6) | (1.5) | (2.4) | (43.9) | (56.1) | (100.0) |
C% | (4.3) | (7.3) | (5.0) | (1.9) | (5.9) | (5.1) | (9.2) | (6.8) |
QTR 2 | 70291 | 56988 | 81055 | 9969 | 11188 | 229491 | 201214 | 430705 |
(16.3) | (13.2) | (18.8) | (2.3) | (2.6) | (53.3) | (46.7) | (100.0) | |
(15.5) | (16.9) | (16.1) | (7.5) | (15.9) | (15.3) | (19.3) | (16.9) | |
QTR 3 | 109114 | 92730 | 131929 | 27364 | 16380 | 377517 | 295781 | 673298 |
(16.2) | (13.8) | (19.6) | (4.1) | (2.4) | (56.1) | (43.9) | (100.0) | |
(24.1) | (27.6) | (26.1) | (20.5) | (23.2) | (25.2) | (28.3) | (25.5) | |
QTR 4 | 254488 | 162083 | 266394 | 93535 | 38733 | 815233 | 451419 | 1266652 |
(20.1) | (12.8) | (21.0) | (7.4) | (3.1) | (64.4) | (35.6) | (100.0) | |
(56.1) | (48.2) | (52.8) | (70.1) | (55.0) | (54.4) | (43.2) | (49.8) | |
Total | 453261 | 336280 | 504495 | 133436 | 70473 | 1497945 | 1044975 | 2542920 |
(17.8) | (14.4) | (19.8) | (5.2) | (2.8) | (58.9) | (41.1) | ||
(100.0) | (100.0) | (100.0) | (100.0) | (100.0) | (100.0) | (100.0) | (100.0) |
The distribution of complex discharges
Mortality and length of stay outcomes
Mortality | Matcheda
| Basedb
| Comparison | Base (%) | Comparison (%) | Significance | |
---|---|---|---|---|---|---|---|
Quartile comparison | Population size | Mortalities | Mortalities | Mortality R | Mortality R | Chi2
| Pr > |Chi2
|
1 vs. 4 | 2916 | 20 | 15 | 1.4 | 1.0 | 0.72 | 0.39 |
1 vs. 3 | 2476 | 12 | 15 | 1.0 | 1.2 | 0.33 | 0.56 |
1 vs. 2 | 2152 | 11 | 8 | 1.0 | 0.7 | 0.47 | 0.48 |
2 vs. 4 | 11692 | 49 | 68 | 0.8 | 1.2 | 3.11 | 0.07 |
2 vs. 3 | 9798 | 44 | 40 | 0.9 | 0.8 | 0.19 | 0.66 |
3 vs. 4 | 16205 | 97 | 222 | 2.4 | 2.7 | 1.51 | 0.21 |
Length of stay | Matcheda
| Basedb
| Comparison | Mean diff | Significanced
| |||||
---|---|---|---|---|---|---|---|---|---|---|
Quartile comparison | Population size | Mean | Std | Median | Mean | Std | Median | Mean diffc
| Z Value | Pr > |z| |
1 vs. 4 | 2916 | 5.5 | 5.53 | 4 | 6.4 | 7.43 | 4 | 0.98 | 2.94 | 0.00 |
1 vs. 3 | 2476 | 5.7 | 6.53 | 4 | 6.2 | 5.20 | 4 | 0.56 | 1.73 | 0.08 |
1 vs. 2 | 2152 | 5.2 | 5.76 | 4 | 5.3 | 5.53 | 4 | 0.07 | -0.08 | 0.93 |
2 vs. 4 | 11692 | 5.5 | 8.76 | 3 | 6.2 | 10.54 | 4 | 0.75 | -5.43 | <.001 |
2 vs. 3 | 9798 | 5.3 | 8.09 | 3 | 5.0 | 6.67 | 3 | -0.29 | -2.05 | 0.04 |
3 vs. 4 | 16205 | 5.8 | 7.47 | 4 | 6.2 | 8.85 | 4 | 0.41 | 4.98 | <.001 |