Table 5.

A comparison of patients enrolled in the first 15 years and the last 5 years of the study period

	First 15 years	Last 5 years	p value
Complications	38.3%	40%	0.271
30-day mortality	8.5%	10%	0.339
180-day mortality	34%	20%	0.386
1-year survival	59.6%	70%	0.224
2-year survival	40.4%	60%	0.023