Table 1 Assembling of the study cohort
Criterion | Number of remaining patients |
|---|---|
Original data | 113,209 |
Known antibiotics treatment | 110,301 |
Known surgeon | 109,681 |
Known ASA | 109,664 |
Removed indication “undergoing other surgery” | 109,196 |
Removed operation method “undergoing common bile duct exploration” | 109,108 |
Known operation time ≤ 24 h | 109,083 |
Known age | 108,841 |
Known gender | 108,839 |
Known gallbladder perforation | 108,502 |
Known emergency status | 107,925 |
Removed institutions with fewer than 25 patients | 99,101 |