Table 1.

Demographic Information of Peripheral Blood Samples for Microarray Experiments (n=122) and PCR Validation (n=106)*

Patient Demographics for all peripheral blood samples included in the microarray and Q-PCR studies. P values for age and post-transplant time were calculated using the T test with unequal variance. Probabilities of steroid usage, gender and donor source were calculated using Chi-Square analysis.

Clinical Characteristics	Microarray Discovery			PCR Validation
	AR (n=60)	STA (n=62)	p value	Training Set			Test Set
				AR (n=23)	STA (n=24)	p value	AR (n=32)	Non-AR (n=166)	p value
Recipients
Gender, % females	31.91%	44.64%	0.19	20.00%	47.37%	0.09	52.00%	36.49%	0.41
Mean age, year	12.49±5.04	10.94±6.01	0.17	10.31±5.24	14.24±5.87	0.05	11.91±5.57	11.85±5.69	0.78
Immunosuppression, %SF	51.06%	57.14%	0.54	66.67%	73.68%	0.67	44%	44.6%	1.00
HLA match	2.45±1.36	2.41±1.41	0.90	3.13±1.41	2.59±1.43	0.27	1.22±1.19	1.39±1.23	0.09
Donors
Donor Source %LRD	63.64%	75.51%	0.21	80.00%	84.21%	0.76	24.00%	41.89%	0.36
Gender, % females	53.49%	48.00%	0.60	46.67%	63.16%	0.35	40.00%	41.89%	1.00
Mean age, year	33.26±13.10	32.72±11.03	0.83	32.41±13.87	39.17±10.31	0.13	27.79±9.69	28.50±10.08	0.59

Values are means ± SD (Standard Deviation) AR, Acute rejection; STA, stable; SF, steroid free; txp, transplant; LRD, living related donor. The sample numbers for each dataset are shown. Discovery, and Training Set samples came from 137 unique Stanford patients; Test Set samples came from 99 unique SNSO1 patients. The Verification set samples came from a subset of samples used for Microarray Discovery.