Table 4.

Characteristics of growing and non‐growing thymomas

Variable	Subcategory	Growing (n = 48)	Non‐growing (n = 18)
Age (years)†		59 ± 10	59 ± 11
Gender (M:F)		28:20	8:10
Diagnosis	A, AB, B1	26 (54.2)	12 (66.7)
	B2, B3	12 (25.0)	5 (27.8)
	C	10 (20.8)	1 (5.6)
Attenuation (HU)‡ , §	Non‐enhanced	46.9 (42.0, 54.0)	44.1 (41.0, 55.6)
	Enhanced	73.6 (56.6, 90.6)	81.6 (61.8, 91.5)
Average diameter (mm)‡		15.0 (7.1, 25.3)	22.6 (16.5, 35.5)
Diameter ratio† , ¶		0.69 ± 0.15	0.71 ± 0.15
Former or current smoker††		22 (53.7)	4 (25.0)
Past cancer history		17 (35.4)	3 (16.7)
Follow‐up interval (days)‡		1209 (504, 1975)	203 (105, 457)

^† Data are mean ± standard deviation.

^‡ Data are median (with interquartile range in parentheses).

^§ Data were not available in 33 patients for non‐enhanced computed tomography (CT) and 26 patients for enhanced CT.

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

^†† Smoking history was not available in nine patients. Unless otherwise specified, data are numbers of patients (% in parentheses).

HU, Hounsfield units.