Table 1.

Clinicopathological features of patients with MPE (n = 168).

Clinicopathological features	ALK positive rearrangement	ALK negative rearrangement	p value
Age (years)
<60	10	71	p=0.012
≥60	2	85
Sex
Male	4	83	p=0.184
Female	8	73
Smoking
Never	9	79	p=0.104
Ever	3	77

ALK, anaplastic lymphoma kinase; chi-square test.