Table 4b. Regression analysis: determinants of intention to participate in the future in preconceptional CF and/or HbPs carrier screening among decliners of the current offer.

Step	Variable	R2 change	β1	β2	β3
1.	Attitude	0.296	0.53***	0.46**	0.45***
	Perceived behavioural control	0.04	−0.18**	−0.16**	−0.11*
	Social influence	0.025	0.17*	0.17**	0.12*
2.	Perceived test consequences	0.082		0.31***	0.32***
	Knowledge about inheritance	0.018		−0.14**	−0.12*
3.	Ancestry	0.019			0.19***
	Having children or not	0.021			0.15**
R2			0.36	0.46***	0.50**
ΔR2				0.10**	0.04**

N=247. Variables are explained in Tables 1 and 2.

^***P≤0.001; ^**0.001<P≤0.01; ^*0.01<P≤0.05.