Reliability of ultrasound ovarian-adnexal reporting and data system amongst less experienced readers before and after training

Table 3 Misclassified ovarian-adnexal reporting and data system categories by readers in pre-training and post-training assessment

ORADS category	Reference standard lexicon descriptor	Misclassification category	Reader lexicon descriptor	Frequency of error in pre-training	Frequency of error in post-training
ORADS 1	Follicle defined as a simple cyst ≤ 3 cm	ORADS 2	Follicle defined as a simple cyst ≤ 3 cm	1	1
	Follicle defined as a simple cyst ≤ 3 cm	ORADS 2	Simple cyst > 5 cm but < 10 cm	1	0
	Follicle defined as a simple cyst ≤ 3 cm	ORADS 3	Multilocular cyst with smooth inner walls/septations < 10 cm, CS1-3	1	0
ORADS 2	simple cyst > 3 cm to 5 cm	ORADS 3	Unilocular cyst with irregular inner wall < 3mm height, any size	0	1
ORADS 3	Multilocular cyst with smooth inner walls/septations, < 10 cm, CS1-3	ORADS 2	Simple cyst > 5 cm but < 10 cm	1	0
	Multilocular cyst with smooth inner walls/septations, < 10 cm, CS1-3	ORADS 4	Multilocular cyst, irregular inner wall ± irregular septation	0	1
	Unilocular cyst (simple or non-simple) ≥ 10 cm	ORADS 4	Unilocular cyst with 1-3 papillary projections	1	0
ORADS 4	Multilocular cyst, irregular inner wall ± irregular septation	ORADS 1	Follicle defined as a simple cyst ≤ 3 cm	1	0
	Multilocular cyst, irregular inner wall ± irregular septation	ORADS 2	Classic benign lesion (hemorrhagic cyst < 10 cm)	1	0
	Multilocular cyst, irregular inner wall ± irregular septation	ORADS 3	Typical dermoid cyst, endometrioma, hemorrhagic cyst ≥ 10 cm	0	1
	Multilocular cyst, irregular inner wall ± irregular septation	ORADS 3	Multilocular cyst with smooth inner walls/septations < 10 cm, CS1-3	3	4
ORADS 5	Solid lesion with irregular outer contour	ORADS 2	Classic benign lesion (dermoid cyst < 10 cm)	10	4
	Solid lesion with irregular outer contour	ORADS 3	Solid lesion with smooth outer contour, any size, CS = 1	0	1
	Solid lesion with irregular outer contour	ORADS 3	Typical dermoid cyst, endometrioma, hemorrhagic cyst ≥ 10 cm	0	1
	Solid lesion with irregular outer contour	ORADS 4	Unilocular cyst with solid component	1	1
	Solid lesion with irregular outer contour	ORADS 4	Solid lesion with smooth outer contour, any size, CS = 2-3	0	2
	Multilocular cyst with solid component, CS3-4	ORADS 4	Multilocular cyst with solid component, CS1-2	1	0

O-RADS: Ovarian-adnexal reporting and data system; CS: Color scor.