Table 3

Multiple logistic regression model: odds of participation of couples in CF carrier screening

Predictor	Odds ratio (95% CI)
Knowledge of disease
High-High	6.1 (1.5–24.9)^3-160
High-Low	3.2 (0.8–13.5)
Low-Low	Ref

IHLC ^3-150
High-High	2.3 (0.7–8.1)
High-Low	5.2 (1.4–19.4)^3-160
Low-Low	Ref

Perceived discomfort ^3-151
High-High/High-Low	Ref
Low-Low	19.2 (2.9–125.5)^3-165

Perceived benefits
High-High	16.2 (3.8–69.1)^3-165
High-Low	7.9 (1.6–39.4)^3-160
Low-Low	Ref

Perceived impact barriers
High-High	Ref
High-Low	3.7 (0.8–17.5)
Low-Low	7.0 (1.5–32.2)^3-160

Ref = reference category.
↵3-150 Internal health locus of control scale.
↵3-151 In the analyses, the subgroups High-High and High-Low were added together, to account for empty cells in the subgroup High-High.
↵3-160 p<0.05,
↵3-165 p<0.01.