Table 3. Details of the anti-stenosis tools, cervical stenosis and the Vancouver Scar Scale (VSS) score in patients with cervical stenosis.

No.	Anti-stenosis tools		Cervical stenosis		VSS score
	Tools	Duration time	Grade	Occurrence time
1	IUD	14 months	Severe	Within one month after the tail of the IUD dropped	10
2	IUD	12 months	Severe	Within one month after removal of the IUD	10
3	IUD	1 week	Severe	Within one month after surgery	9
4	None	/	Severe	Within one month after surgery	9
5	IUD	6 months	Severe	Within one month after removal of the IUD	8
6	IUD	6 months	Severe	Within one month after removal of the IUD	8
7	IUD	17 months	Severe	Within one month after removal of the IUD	7
8	IUD	9 months	Severe	Within one month after removal of the IUD	6
9	IUD	3 months	Severe	Within one month after surgery	1
10	Catheter	10 days	Mild	One year after surgery	9
11	Catheter	1 month	Mild	One year after surgery	8
12	IUD	3 months	Mild	Within one month after removal of the IUD	7
13	None	/	Mild	Half a year after surgery	7
14	None	/	Mild	Half a year after surgery	5
15	IUD	1 month	Mild	Half a year after surgery	1

IUD: intrauterine device; Severe: severe stenosis, completely obstructed of the cervical os; Mild, mild stenosis: stenosis but not atresia.