TABLE II.

Effect of Donor KIR Genotype on Outcome

A. All Transplants	LFS
Donor KIR Content Group	N	RR (CI)	P
KIR B=0 [i.e. KIR A/A]	478	1.00
KIR B ≥1 [i.e. KIR B/x]	964	0.89 (0.78–1.01)	0.075
KIR B=1	535	0.98 (0.85–1.14)	0.80
KIR B=2	325	0.79 (0.66–0.94)	0.008
KIR B=3+4	104	0.76 (0.59–0.99)	0.043
KIR B=0 or 1 [i.e. Neutral Donors]	1013	1.00
B≥2 (non Cen B/B) [i.e. Better Donors]	290	0.86 (0.73–1.00)	0.055
B≥2 (Cen B/B) [i.e. Best Donors]	139	0.67 (0.54–0.85)	0.0007
B≥2 [i.e. Better/Best Donors]	429	0.79 (0.69–0.91)	0.001

B. All Transplants	Relapse
Donor KIR B Content Group	N	RR (CI)	P
KIR B=0 [i.e. KIR A/A]	499	1.00
KIR B ≥1 [i.e. KIR B/x]	1003	0.88 (0.73–1.06)	0.18
KIR B=1	556	1.03 (0.84–1.26)	0.77
KIR B=2	339	0.73 (0.57–0.94)	0.014
KIR B=3+4	108	0.64 (0.43–0.97)	0.033
KIR B=0 or 1 [i.e. Neutral Donors]	1055	1.00
B≥2 (non Cen B/B) [i.e. Better Donors]	302	0.82 (0.65–1.02)	0.078
B≥2 (Cen B/B) [i.e. Best Donors]	145	0.46 (0.31–0.68)	0.0001
B≥2 [i.e. Better/Best Donors]	447	0.70 (0.57–0.86)	0.0005