Additional file 2 of Hospital spending and length of stay attributable to perioperative adverse events for inpatient hip, knee, and spine surgery: a retrospective cohort study

Additional File 2: Secondary analysis of costs separated by grouped functional centre. Supplemental tables of unadjusted and propensity-matched cost estimates, broken down by grouped functional centre.附加文件2：按分组职能中心划分的成本二次分析。补充表格涵盖未经调整的成本估算值与倾向得分匹配（propensity-matched）成本估算值，且均按分组职能中心进行细分。