Table 2.

Results of the univariate log‐rank test for the prediction of interval growth

Variable	Subcategory	Thymic cyst P	TET P
Age		0.925	0.296
Gender		0.235	0.997
Diagnosis†		—	0.355
Attenuation	Non‐enhanced	0.002‡	0.812
	Enhanced	—	0.216
Average diameter		0.530	0.037
Diameter ratio§		0.517	0.561
Former or current smoker		0.833	0.884
Past cancer history		0.420	0.090

^† The diagnosis of thymic epithelial tumor (TET) was categorized into low‐grade thymoma (types A, AB, and B1), high‐grade thymoma (types B2 and B3), and thymic carcinoma.

^‡ The attenuation of thymic cysts was dichotomized based on a cutoff of 20 Hounsfield units (HU, i.e. water attenuation ≤ 20 HU vs. > 20 HU), regardless of the contrast‐enhancement status of computed tomography scans (number of missing data for attenuation after data pooling was 7).

^§ The ratio of the maximum perpendicular diameter to the longest diameter.