Table 3.

Unadjusted and Risk‐Adjusted In‐Hospital Mortality Effects (NACSA Cohort)

	Frequency	Observed Mortality (%)	Unadjusted OR (95% CI)	Adjusted OR (95% CI)
Aortic segmenta
Root/ascending aorta	6848	8.3	Reference	Reference
Aortic arch	762	13.3	1.75 (1.42, 2.16)	1.86 (1.47, 2.35)
Descending aorta	320	15.3	1.86 (1.38, 2.51)	2.30 (1.66, 3.18)
Thoracoabdominal aorta	128	22.7	1.91 (1.18, 3.09)	2.75 (1.67, 4.56)
Activity tertileb
Low‐volume (latest 3 years' activity)	1308	10.6	Reference	Reference
Medium‐volume (latest 3 years' activity)	2159	9.5	0.89 (0.71, 1.12)	0.80 (0.62, 1.02)
High‐volume (latest 3 years' activity)	4591	8.8	0.82 (0.67, 1.00)	0.76 (0.60, 0.95)
Dominant pathologyc
Aneurysm	4422	4.9	Reference	Reference
Dissection	1819	17.2	4.07 (3.39, 4.89)	2.27 (1.82, 2.82)
Other	1284	13.2	2.97 (2.40, 3.67)	2.05 (1.61, 2.61)
Data N/A	533	9.6	2.07 (1.50, 2.85)	1.78 (1.26, 2.52)
Priorityb
Elective	5117	4.8	Reference	Reference
Nonelective	2941	17.1	4.08 (3.47, 4.78)	2.54 (2.09, 3.08)

^aAdjusted for preoperative comorbidities, operative risk factors, and activity tertile.

^bAdjusted for preoperative comorbidities, operative risk factors, and most distal aortic segment.

^cAdjusted for preoperative comorbidities, operative risk factors, most distal aortic segment, and activity tertile.