Psychological models in predicting uptake of prenatal screening

Abstract

The purpose of the current study was to determine which psychological models are most useful in predicting uptake of a prenatal screening test, maternal-serum alphafetoprotein screening for spina bifida and Down's syndrome. 1000 women eligible for the test completed standardised self-report questionnaires at two routine clinic visits to an antenatal clinic prior to the time when the test could take place. 902 underwent the screening test; 51 declined the test; and 47 did not undergo the test, giving no reason for this to staff. Knowledge of the test, the subjective expected utility attached to the test, and attitudes to doctors and medicine were all significant predictors of uptake behaviour. Results of a discriminant function analysis demonstrated distinct psychological processes underlying each of these three uptake behaviours, explaining 21% of the variance in uptake of screening. If uptake of screening is examined not as a dichotomous variable but as a group of behaviours, predictive models are identified accordingly. This would lead to rnodels of health-related behaviours as a heterogeneous rather than homogeneous phenomena, predicted and influenced by different causes.