Skip to main content
. Author manuscript; available in PMC: 2011 Oct 1.
Published in final edited form as: Surgery. 2010 Aug 12;148(4):618–624. doi: 10.1016/j.surg.2010.07.017

Table 2. Age distribution comparison for the PRE-DIF and POST-DIF time periods.

AGE: p = 0.377 PRE-DIF
(n=4,810)
POST-DIF
(n=4,875)
Less than 40 years (%) 43.6% 42.4%
41-50 years (%) 16.3% 15.5%
51-60 years (%) 13.6% 14.1%
61-70 years (%) 8.3% 8.6%
71-80 years (%) 8.0% 8.1%
> 80 years 10.2% 11.3%