Table 2.

Actuarial freedom from major postoperative complications.

	Group 1 (Bentall) % ± SE				Group 2 (David I) % ± SE
	N.	10 years	15 years	N.	5 years	10 years	p
Late deaths	18	82 ± 4	70 ± 6	4	91 ± 5	84 ± 8
Thromboembolism	10	91 ± 4	79 ± 7	-	100	100
Hemorrhages	7	92 ± 3	92 ± 3	-	100	100
Endocarditis	-	100	100	5	92 ± 4	92 ± 4
Reoperation	3	97 ± 2	97 ± 2	7	90 ± 5	84 ± 7
Major complications	22	80 ± 5	68 ± 7	7	90 ± 4	83 ± 7

SE = Standard error.

Data of Group 1 and 2 are not congruent due to different follow-up intervals.