Table 3. Mean scores and proportion of participants in the survey who had a score above or below 3 (the neutral point) for determinants of the intention to participate or not to participate in the screening.
| All (n=418) | Offer acceptors (test- intenders) (n=171) | Offer decliners (test non-intenders) (n=247) | |||
|---|---|---|---|---|---|
| Variables/scalesa | Mean | Mean | n(% ≥3) | Mean | n(% ≥3) |
| Theory of Planned Behaviour | |||||
| Attitude | 3.8 | 4.1 | 168 (98) | 3.5*** | 206 (83)*** |
| Social influence | 2.5 | 3.1 | 83 (49) | 2.2*** | 42 (17)*** |
| Perceived behavioural control | 4.2 | 4.5 | 165 (96) | 4.0*** | 227 (92)*** |
| Other variables | |||||
| Perceived benefits | 3.9 | 4.3 | 158 (92) | 3.6*** | 198 (80)*** |
| Perceived consequences of test results | 3.2 | 3.4 | 132 (77) | 3.1*** | 158 (64)** |
| Severity of disorders | 4.4 | 4.3 | 158 (92) | 4.4 | 239 (97)* |
| Perceived susceptibility | 1.8 | 2.0 | 32 (19) | 1.7*** | 42 (17) |
| Knowledge about inheritanceb | 2.6 | 2.5 | 87 (51) | 2.6 | 125 (51) |
| n (% ≤3) | n (% ≤3) | ||||
| Impact of the offer | 2.2 | 1.9 | 154 (90) | 2.4*** | 181 (73)*** |
| Stigmatisation | 2.1 | 2.1 | 147 (86) | 2.2 | 212 (86) |
| Feeling of eugenics | 2.5 | 2.2 | 139 (81) | 2.6* | 194 (79) |
| n (% yes) | n (% yes) | n (% yes) | |||
| Familiarity with disorders | 241 (58) | 94 (55) | 147 (60) | ||
| Familiarity with carrier test(s) | 64 (15) | 21 (12) | 43 (17) | ||
| Religion | 16 (4) | 7 (4) | 9 (4) | ||
a
Mean scores were based on a 5-point Likert scale. Except for ‘impact of the offer', ‘stigmatisation', and ‘feelings of eugenics', (1) represents a negative/unfavourable score and (5) a positive/favourable score.
b
Knowledge about inheritance was calculated as a sum score, with a minimum of 0 and a maximum of 5.
*P<0.05; **P<0.01; ***P<0.001. Offer acceptors were compared with offer decliners on mean scores and on proportion of people with a score of 3 or above or a score of 3 or below (for ‘impact of the offer', ‘stigmatisation', and ‘feelings of eugenics').