Table 2.

Positive rate of protein chip in each group

Group	N	Positive case	Negative case	Positive rate
Lung cancer	217	158	59	72.81%
Benign lung disease	80	18	62	22.50%
Healthy	220	37	183	16.82%

Comparison of lung cancer and healthy groups, χ² = 135.68, P < 0.05; comparison of lung cancer and benign lung disease groups, χ² = 61.29, P < 0.05; comparison of benign lung disease and healthy groups, χ² = 1.26, P > 0.10.