Table 2.

Significance of EC-AIA expanding into the endometrium

	Endometrium extension		p value
	No	Yes
No.	n = 28	n = 16
Age	59.3 ± 10.2	58.2 ± 10.0	0.91
<50	4 (14.8%)	3 (18.8%)
50–59	10 (37.0%)	5 (31.2%)
≥60	13 (48.2%)	8 (50.0%)
Symptom			0.24
Abnormal uterine bleeding	9 (32.1%)	9 (56.3%)
Abdominal-pelvic pain	8 (28.6%)	5 (31.3%)
Other symptoms	3 (10.7%)	1 (6.2%)
Asymptomatic	8 (28.6%)	1 (6.2%)
Grade			0.99
low-grade	18 (69.2%)	9 (64.3%)
high-grade	8 (30.8%)	5 (35.7%)
Histology			0.40
Endometrioid	21 (75.0%)	12 (80.0%)
Serous	4 (14.3%)	3 (20.0%)
Clear cell	3 (10.7%)	0
Stage			0.16
I	20 (80.0%)	8 (57.2%)
II	0	1 (7.1%)
III	2 (8.0%)	4 (28.6%)
IV	3 (12.0%)	1 (7.1%)

Student t test, Chi-square, and Fisher’s exact test for p value

Mean (±SD) or number (%) is shown

1 missing data for age and histology, 4 missing data for grade, and 5 missing data for stage

EC-AIA and endometrial cancer arising in adenomyosis