Subgroup analysis of patients with locally advanced
stage showed that survival was longer in stage IIIB
patients with atelectasis (1-year survival rates
and median survival in atelectatic patients were
72.2% and 13.93 months; in non-atelectatic patients
they were 35.8% and 9.26 months, respectively,
P = 0.044). However, because there were only
8 patients in stage IIIA, survival curves could not
be calculated in this subgroup.