Table 3.

Performance of original CTP (oCTP), modified CTP (mCTP), simplified modified CTP (mCTP₁₃), and creatinine-modified CTP (mCTP-Cr) in predicting 5-year transplant-free survival in cohorts drawn from 2008 quarters 1–4

Quarter	N	Events	oCTP		mCTP
			HR	Harrel’s C	HR	Harrel’s C
Q1	30,897	15,275	1.50 (1.49–1.52)	0.701 ± 0.002	1.53 (1.52–1.54)	0.709 ± 0.002
Q2	31,033	15,515	1.48 (1.47–1.49)	0.694 ± 0.002	1.52 (1.51–1.54)	0.705 ± 0.002
Q3	30,989	15,521	1.48 (1.47–1.49)	0.700 ± 0.002	1.51 (1.50–1.52)	0.708 ± 0.002
Q4	30,218	15,287	1.49 (1.48–1.50)	0.702 ± 0.002	1.53 (1.52–1.54)	0.712 ± 0.002

Quarter	N	Events	mCTP13		mCTP-Cr
			HR	Harrel’s C	HR	Harrel’s C
Q1	30,897	15,275	1.60 (1.58–1.61)	0.709 ± 0.002	1.57 (1.56–1.59)	0.712 ± 0.002
Q2	31,033	15,515	1.59 (1.57–1.60)	0.705 ± 0.002	1.57 (1.55–1.58)	0.708 ± 0.002
Q3	30,989	15,521	1.57 (1.56–1.59)	0.707 ± 0.002	1.56 (1.54–1.57)	0.711 ± 0.002
Q4	30,218	15,287	1.60 (1.58–1.61)	0.712 ± 0.002	1.57 (1.55–1.58)	0.714 ± 0.002