Table 1.

Comparison of the patients’ clinical characteristics

Clinical features	Patients with malignant GGOs (n = 139)	Patients with benign GGOs (n = 87)	P Value
Age (years)	61.5 ± 9.5	52.6 ± 12.7	<  0.001
Gender
Female	83 (59.7)	37 (42.5)	0.012
Male	56 (40.3)	50 (57.5)
Smoking history
Yes	42 (30.2)	27 (31.0)	0.897
No	97 (69.8)	60 (69.0)
History of malignant tumor
Yes	9 (6.5)	17 (19.5)	0.003
No	130 (93.5)	70 (80.5)
Family history of lung cancer
Yes	11 (7.9)	1 (1.1)	0.057
No	128 (92.1)	86 (98.9)
Respiratory symptoms
Yes	34 (24.5)	14 (16.1)	0.134
No	105 (75.5)	73 (83.9)

Data are expressed as number (percentage) or mean ± standard deviation

GGOs ground-glass opacities