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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: J Am Coll Surg. 2012 Feb 28;214(4):640–647. doi: 10.1016/j.jamcollsurg.2011.12.036

Table 4.

Comparison of Preoperative Ventilation Days for Survivors vs. Mortalities per Group

Group Survivors Mortalities p Value
Group 1, d, mean ± SEM 3.1 ± 0.6 7.9 ± 2.3 0.06
Group 2, d, mean ± SEM 7.3 ± 0.9 14.6 ± 3.4 0.09