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. Author manuscript; available in PMC: 2015 Mar 1.
Published in final edited form as: Ann Thorac Surg. 2014 Jan 18;97(3):916–922. doi: 10.1016/j.athoracsur.2013.11.015

Table 2.

Normalized metrics for the cohort, LT, and EC groups

Nakata Index P-value McGoon Ratio P-value
T1 T2 T1 T2
All 225.12±70.4 191.63±38.0 0.030* 1.75±0.35 1.55±0.30 0.015*
LT 246.4±69.0 204.7±37.8 0.056 1.8±0.4 1.6±0.3 0.105
EC 187.3±58.4 168.4±26.6 0.260 1.7±0.3 1.4±0.2 0.038*

EC: extra-cardiac; LT: lateral tunnel; T1: initial study; T2: later study; (*): significant