Table 2.

Seasonal variation in kidney transplants using organs from donors after brain death

Cause of death in the donor	n	P value for whether donation varied across the year
Intracranial/cerebrovascular causes	6985	<0.01
Hypoxic brain damage	1232	<0.01
Trauma	970	<0.01
Infective causes	260	<0.01
Cardiovascular	71	<0.01
Respiratory/pulmonary causes	7	0.18
Brain tumours	149	0.57
Poisoning/drug overdose	26	<0.01
Other/unknown	350	0.21

All donations after brain death over a 10-year period were split into groups according to aetiology defined by NHS Blood and Transplant. The incidence for the majority (6/9) of causes varied significantly during the year.