Table 2.
Course of hospital admission: Overall and by different lockdowns
| No lockdown | Any Lockdown | P value | |
|---|---|---|---|
| Number of patients (overall 991,579) | 925,155 (93.3) | 66,424 (6.7) | |
| Diagnostic | |||
| SARS-CoV-2 testing (135,652, 13.7%) | 85,942 (9.3) | 49,710 (74.8) | <0.001 |
| SARS-CoV-2 positive (815, 0.6%) | 210 (0.02) | 605 (1.2) | <0.001 |
| CT diagnostic (597,102, 60.2%) | 552,755 (60.0) | 44,347 (66.8) | <0.001 |
| Overall course $ | |||
| Conservative (663,380, 66.9%) | 616,447 (66.6) | 46,933 (70.7) | <0.001 |
| Mortality (3,026, 0.5%) | 2,802 (0.5) | 224 (0.5) | 0.428 |
| Drain only (4,009, 0.4%) | 3,585 (0.4) | 424 (0.6) | <0.001 |
| Mortality (111, 2.8%) | 97 (2.7) | n.s. | 0.590 |
| Colon surgery only without ostomy (177,264, 17.9%) | 167,521 (18.1) | 9,743 (14.7) | <0.001 |
| Mortality (1,303, 0.7%) | 1,239 (0.7) | 64 (0.7) | 0.540 |
| Other one-time procedure without ostomy (65,884, 6.6%) | 62,443 (6.8) | 3,441 (5.2) | <0.001 |
| Mortality (547, 0.8%) | 516 (0.8) | 31 (0.9) | 0.873 |
| Any surgery including ostomy (20,685, 2.1%) | 19,281 (2.1) | 1,404 (2.1) | 0.337 |
| Mortality (1,895, 9.2%) | 1,756 (9.1) | 139 (9.9) | 0.307 |
| Any surgery with at least one revision surgery (10,443, 1.1%) | 9,786 (1.1) | 657 (1.0) | 0.072 |
| Mortality 1,573, 15.1%) | 1,460 (14.9) | 113 (17.2) | 0.286 |
| Surgical treatment on a weekend (6,169, 0.6%) | 5,728 (0.62) | 441 (0.66) | 0.358 |
| Mortality (460, 7.5%) | 424 (7.40) | 36 (8.2) | 0.841 |
| Time from admission to surgery | 186,328 # | 11,282 # | |
| < 12 h (32,301, 16.3% of 197,610#) | 29,702 (15.9) | 2,599 (23.0) | <0.001 |
| Mortality (847, 2.6%) | 791 (2.7) | 56 (2.2) | 0.315 |
| 12-24 h (29,878, 15.1% of 197,610#) | 28,138 (15.1) | 1,744 (15.5) | 0.405 |
| Mortality (323, 1.1%) | 301 (1.1) | 22 (1.3) | 0.749 |
| > 24 h (135,431, 68.5% of 197,610#) | 128,492 (69.0) | 6,939 (61.5) | <0.001 |
| Mortality (2,083, 1.5%) | 1,954 (1.5) | 129 (1.9) | 0.078 |
| Timing of surgery | 188,672 * | 11,442 * | |
| Emergency hours (4.01 pm through 5 am) (15,331, 7.7% of 200,114*) | 14,430 (7.6) | 901 (7.9) | 0.285 |
| Mortality (955, 6.2%) | 896 (6.2) | 59 (6.5) | 0.239 |
| Regular hours (5.01 am through 4 pm) (182,675, 91.3% of 200,114*) | 172,283 (91.3) | 10,392 (90.8) | 0.889 |
| Mortality (2,309, 1.3%) | 2,160 (1.3) | 149 (1.4) | 0.244 |
P from overall chi square. First lockdown is admission between 04-06/2020 and second lockdown is admission between 10/2020 and 05/2021. Percentages of positive SARS-CoV-2 testing refer to the whole of tested patients. *Surgical patients with available time coding of their surgical procedures mounted up to 200,114 cases, of which in 2,504, no exact date and time of admission were coded. This resulted in 197,610 cases of # surgical patients with available time coding of their surgical procedures. $ in 49,914 cases, there was an unclear course of events with regards to the classification above. ‘n.s.’ for not stated due to data protection legislation; at least one value was a maximum of 3