Table 1. Results in patients treated for thoracic and thoracoabdominal aneurysms. Hypothermic arrest was used when anatomy precluded aortic cross clamping and had higher mortality. Intercostal re-implantation was started in 2005 as was TEVAR, leading to lower paralysis risk and mortality.

Group	No.	O/E	% Deficit	% Mortality (elective, acute)
All	738	0.18	3.8	7.3 (2.8,15.7)
Intercostal re-implantation	261	0.11	2.3	3.8 (0.6,9.6)
Hypothermic arrest	33	0.24	9.1	18.2 (0.0,33.3)