Table 1: Baseline characteristics of patients in the two groups.

CharacteristicJune 2012 to
July 2013
July 2011 to
May 2012
value

Number of patients ()9060
Age (y)59.0 ± 11.661.4 ± 14.10.273
Male/female ()54/3641/190.299
Lesion location
 Pulmonary ()74490.415
 Mediastinum ()104
 Pleural ()67
Malignant/benign ()66/2436/240.086

Values are mean ± SD where applicable.