Table III.

KIR-Better/Best Donors Improve Outcomes for C1/x Recipients

	Outcome	Donor KIR Group	All Transplants			HLA-Matched			HLA-Mismatched
			N	RR	P	N	RR	P	N	RR	P
Recipient HLA C1/x	LFS	KIR-Neutral	865	1.00		502	1.00		363	1.00
		KIR-Better/Best	354	0.78 (0.67–0.91)	0.0015	201	0.86 (0.69–1.07)	0.17	153	0.70 (0.56–0.88)	0.003
	Relapse	KIR-Neutral	903	1.00		521	1.00		382	1.00
		KIR-Better/Best	367	0.70 (0.56–0.87)	0.0018	211	0.79(0.59–1.06)	0.11	156	0.61 (0.43–0.88)	0.008
	TRM	KIR-Neutral	893	1.00		516	1.00		377	1.00
		KIR-Better/Best	363	0.89 (0.72–1.09)	0.26	207	1.02 (0.75–1.40)	0.90	156	0.82 (0.62–1.10)	0.19
Recipient HLA C2/C2	LFS	KIR-Neutral	148	1.00		77	1.00		71	1.00
		KIR-Better/Best	75	0.93 (0.63–1.37)	0.71	42	0.81 (0.45–1.43)	0.47	33	1.28 (0.67–2.45)	0.45
	Relapse	KIR-Neutral	152	1.00		80	1.00		72	1.00
		KIR-Better/Best	80	0.80 (0.47–1.36)	0.41	43	0.64 (0.29–1.42)	0.27	37	1.20 (0.51–2.83)	0.68
	TRM	KIR-Neutral	150	1.00		79	1.00		71	1.00
		KIR-Better/Best	78	0.94 (0.57–1.55)	0.81	42	0.89 (0.42–1.89)	0.76	37	0.98 (0.45–2.16)	0.96