Table 1.

Baseline donor and recipient characteristics stratified by weekday and weekend transplantation

	Weekday Tx (N=99 061)	Weekend Tx (N=37 654)	p Value
Recipient characteristics
Age (mean±SD)	49.6±13.2	49.6±13.2	0.71*
Gender (% males)	60.6	60.6	0.87†
Race (%)			0.16†
White	52.0	52.3
Black	30.4	30.5
Hispanic	12.7	12.2
Other	5.0	5.0
BMI median (IQR)	25.2 (22.0–29.2)	25.1 (22.0–29.3)	0.30‡
Diagnosis of ESRD			0.29†
Diabetes	22.9	22.9
Hypertension	24.3	24.4
Glomerulonephritis	23.7	24.0
Cystic kidney disease	8.8	8.9
Other	18.5	18.0
Unknown	1.8	1.8
Days on waiting list, median (IQR)	559 (228–1069)	565 (229–1067)	0.28‡
Peak level of PRA (%) median, (75, 90, 95 centiles)	2 (16, 78, 93)	1 (15, 77, 93)	0.33‡
Prior kidney Tx (%)	10.6	10.3	0.119†
Cold ischaemia time in hours: median (IQR)	19 (13–24)	18 (13–24)	<0.001‡
Zero HLA mismatch (%)	14.2	13.5	0.002†
Number of HLA mismatches (mean±SD)	3.5±1.9	3.5±1.8	0.056*
ABO-incompatible Tx	5.1	4.7	0.027†
Year of transplantation (%)			0.072§
1994 (April 1)-1995 (n=17 816)	9.2	9.5
1996–2000 (n=57, 880)	27.3	27.7
2001–2005 (n=71, 353)	30.5	30.0
2006–2010 (September 3) (n=72 615)	32.9	32.8
Donor characteristics
Age (mean±SD)	37.3±17.1	37.3±17.1	0.52*
Gender (% males)	59.6	58.7	0.003†
BMI median (IQR)	25.2 (22.0–29.2)	25.1 (22.0–29.3)	0.30‡
Race			<0.001†
White	73.9	74.0
Black	11.8	12.4
Hispanic	12.3	11.6
Other	2.0	1.9
Expanded criteria donor %	16.4	16.4	0.89†
Donor creatinine mg/dL (mean±SD)	1.15±1.30	1.14±1.33	0.70†

*t-test independent samples.

†χ²-test proportions.

‡Mann-Whitney test.

§χ²-trend test.

BMI, body mass index; ESRD, end-stage renal disease; HLA, human leucocyte antigen; PRA, panel reactive antibodies; Tx, transplant.