The correlation between tumor radiological features and spread through air spaces in peripheral stage IA lung adenocarcinoma: a propensity score-matched analysis

Table 2 The chi-square test table for the incidence of STAS among different types of nodules

	STAS positive	STAS negative	Chi-square	p-value
Solid nodule, n (%)	13 (76.5)^b	44 (44.0)^a	7.49	0.024
Partial solid nodule, n (%)	3 (17.6)^a	19 (19.0)^a
Ground-glass nodule, n (%)	1 (5.9)^b	37 (37.0)^a

Each superscript letter indicates a subgroup of STAS categories, and at the significance level of p = 0.05, there is no significant difference in proportions between these subgroups. STAS refers to spread through air space

ISSN: 1749-8090