Table. 1.

Center volume and patient outcomes after kidney transplantation

Study No. of patients No. of centers Primary outcomes: graft failure, mortality Cut-off value (case/yr) Impact of case volume
Axelrod et al. (2004) [10] 60,778 258 1-yr mortality or graft loss Low (46–75)
High (125–278)
Significant
Barbas et al. (2018) [4] 2,016,179 NA O:E ratio of 1-mo graft loss, 1-mo mortality, and 1-yr mortality Low (1–31)
Medium (32–74)
High (>75)
Significant
Tsampalieros et al. (2019) [9] 5,037 5 Death-censored graft loss Not specified Significant
Oh et al. (2019) [11] 13,872 74 1-yr graft failure, in-hospital mortality, long-term graft survival Low (<25)
Medium (25–60)
High (>60)
Significant
Sonnenberg et al. (2019) [12] 79,581 219 3-yr all-cause graft failure and mortality Low (<66)
High (>196)
Insignificant

NA, not available; O:E, observed-to-expected.

Korean J Transplant 2023;37:1~10 https://doi.org/10.4285/kjt.23.0010
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