Page 71 - Preventing pertussis in early infancy - Visser
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analysis. We used univariate and multivariate logistic regression analysis to assess the association between intention and its personal and psychosocial determinants. We chose the Nagelkerke index to express a pseudo R2 to approximate the explained variance of the multivariate logistic model. To assess the contribution of the beliefs in explaining attitude, we used a univariate and multivariate linear regression analysis. We used the R2 to express the explained variance in the multivariate linear model. Those determinants correlating (r > 0.3) with the outcome variable (intention or attitude) in the univariate analyses were entered simultaneously in the multivariate model to assess their unique contribution to explaining the outcome variable. We built a final multivariate regression model by backwardly eliminating the non-significant determinants until only significant determinants (p < 0.05) remained.
Ethical review
The Medical Ethics Committee of the District of Arnhem – Nijmegen assessed the study and concluded that it was exempt from their approval (reference number: 2010/475).
Results Population
Altogether, 486 maternity assistants, 320 midwives, and 200 paediatric nurses completed the questionnaire (Table 2) . Most were women. All the groups had equally high vaccination coverage of their own childhood vaccinations, which is comparable to the total Dutch vaccination coverage of 92%–95% (van Lier et al. 2015). However, their children’s vaccination coverage differed: fewer midwives vaccinated their children than maternity assistants and paediatric nurses. The rates for participants influenced by a specific philosophical background (e.g. religion, homeopathy, natural cure, or anthroposophy) were slightly high compared to the 8.2% in the general population (Mollema L 2009). The rates of experience with pertussis in children differed among the groups, as expected due to the nature of their profession.
Intention
In all, 67% of the maternity assistants, 53% of the midwives, and 45% of the paediatric nurses intended to accept pertussis vaccination (Table 2). The mean scores on the intention scale (range 1–7) were 5.3 (SD 1.8), 4.5 (SD 2.0), and 4.0 (SD 2.0), respectively.
Determinants of intention
Most participating HCWs considered it their autonomous choice to accept or decline pertussis vaccination (89.5%, 93.4%, and 95.0%, respectively) and said they could get vaccinated if they wanted to (82.9%, 86.4%, and 76.0%, respectively). However, considerably fewer HCWs had a positive attitude towards pertussis vaccination (55.6%, 28.6%, and 31.0%, respectively) or thought important others would value the vaccination positively (66.6%,
Quantitative study HCWs
Quantitative study HCWs
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