Table 2.

Difference analysis of EGFR gene mutation abundance (%) in different specimen types

Specimen types	Mean ± SD	P‐value
Blood	2.17 ± 5.04	0.001
Body fluid sediment cells	10.39 ± 14.18*
Body fluid supernatant	20.46 ± 16.01**,***

^* P < 0.05 versus blood.

^** P < 0.05 versus blood.

^*** P < 0.05 versus body fluid sediment cells.