Table 2. Factors influencing women’s choice in prenatal testing.

	Choosing NIPT vs Choosing CVS			Choosing Amniocentesis vs Choosing CVS			Choosing NIPT vs Choosing Amniocentesis
Predictors	RRR	95(%) CI	p	RRR	95(%) CI	p	RRR	95(%) CI	p
Maternal age	1.06	0.99—1.14	0.125	0.97	0.86—1.10	0.628	1.09	0.99—1.20	0.089
Gestational age	1.09	1.02—1.17	0.014*	1.17	1.07—1.28	0.000**	0.93	0.88—0.99	0.013*
Counseling day
—Monday or Tuesday = 1	4.47	2.04—9.85	0.000**	1.36	0.38—4.82	0.637	3.30	1.13—9.56	0.028*
—Wednesday, Thursday or Friday = 0	referent
Screening trimester
—The second trimester screening = 2	84183.89	0—(choosingCVS = 0)	0.984	230507.20	0 —(choosingCVS = 0)	0.983	0.37	0.07—1.92	0.235
—The first trimester screening = 1	referent
Serum screening risk score	1.00	1.00—1.01	0.135	1.00	0.99—1.01	0.510	1.01	1.00—1.02	0.088

*p<0.05;

**p<0.01