Table 4. Distribution of modified GPS 1 in patients with benign and malignant fGGOs before and after PSM.

	Before PSM (n = 128)				After PSM (n = 82)
	m1GPS 0, n (%)	m1GPS 1, n (%)	m1GPS 2, n (%)	Total, n	m1GPS 0, n (%)	m1GPS 1, n (%)	m1GPS 2, n (%)	Total, n
Benign, n (%)	26 (51.0%)	17 (33.3%)	8 (15.7%)	51	13 (31.7%)	22 (53.7%)	6 (14.6%)	41
Malignant, n (%)	30 (39.0%)	30 (39.0%)	17 (22.0%)	77	10 (24.4%)	3 (7.3%)	28 (68.3%)	41

fGGOs: focal Ground-glass Opacity.

PSM: propensity score matching.

m1GPS: modified Glasgow prognostic score system 1.