Table 3.

Comparison of Adjusted Pre-Transplant Dialysis Durations (in Years) among Recipients with Preemptive Wait-Listing between the Pre- and Post-KAS Periods

	Pre-Transplant Dialysis Exposure (in Years)		Difference in Years:
	Pre-KAS December 4, 2011-December 3, 2014	Post-KAS December 4, 2014-December 3, 2017	Between Periods	In difference
White	1.19 (95% CI 1.10–1.28)	1.24 (95% CI 1.14–1.34)	+0.05 (95% CI −0.04–0.14)	reference
Black	1.64 (95% CI 1.51–1.78)	1.74 (95% CI 1.59–1.89)	+0.10 (95% CI −0.03–0.23)	−0.05 (95% CI −0.18–0.09)
Hispanic	1.43 (95% CI 1.25–1.61)	1.63 (95% CI 1.48–1.79)	+0.20* (95% CI 0.05–0.36)	−0.15 (95% CI −0.32–0.02)
Other	1.61 (95% CI 1.42–1.79)	1.70 (95% CI 1.52–1.87)	+0.09 (95% CI −0.11–0.29)	−0.04 (95% CI −0.24–0.16)

Abbreviations: KAS—Kidney Allocation System; CI—Confidence Interval

^*p<0.05

Estimates represent predicted marginal mean dialysis durations that are standardized to the cohort distributions of recipient age (years), sex, diabetes status, hepatitis C status, HIV status, prior living donor status, prior organ transplant status, OPTN region, calculated PRA, blood group, PHS increased risk status, kidney donor profile index category, zero HLA antigen mismatch, education level, private insurance status, and waiting time years)