An exploratory qualitative assessment of factors influencing childhood vaccine providers' intention to recommend immunization in the Netherlands

<p>Abstract</p> <p>Background</p> <p>Under the Dutch national immunization program (NIP), childhood vaccination is not mandatory, but its recommendation by childhood vaccine providers (CVP) is important for maintaining high vaccination coverage. We therefore examined factors related to providers' intentions to recommend vaccinations to parents of young children.</p> <p>Methods</p> <p>We conducted four focus group discussions with nurses and physicians who provide vaccines to children 0-4 years old in diverse regions of the Netherlands. Three groups represented CVPs at child welfare centers (CWCs) serving the general population, with the fourth representing anthroposophical CWCs. Elements of the Theory of Planned Behaviour (TPB) were used to design the groups; thematic analysis was used to structure and analyze the dataset.</p> <p>Results</p> <p>Four main themes emerged, including 1) perceived responsibility: to promote vaccines and discuss pros and cons with parents (although this was usually not done if parents readily accepted the vaccination); 2) attitudes toward the NIP: mainly positive, but doubts as to NIP plans to vaccinate against diseases with a low perceived burden; 3) organizational factors: limited time and information can hamper discussions with parents; 4) relationship with parents: crucial and based mainly on communication to establish trust. Compared to CVPs at standard CWCs, the anthroposophical CWCs spent more time communicating and were more willing to adapt the NIP to individual cases.</p> <p>Conclusions</p> <p>Our qualitative assessment provides an overview of beliefs associated with providers' intention to recommend vaccinations. They were motivated to support the NIP, but their intentions to recommend vaccinations were affected by the perceived relevance of the vaccines, practical issues like limited time and by certain types of resistant parents. These results will inform future studies to test the magnitude and relative impact of these factors.</p

Appreciation and implementation of the Krachtvoer healthy diet promotion programme for 12- to 14- year-old students of prevocational schools

<p>Abstract</p> <p>Background</p> <p>Krachtvoer is a school-based healthy diet programme, developed in 2001 and revised in 2007 to meet the needs of particular segments of the target population as well as a wider target group. The main aims of the present process evaluation of the revised programme were to examine student and teacher appreciation of the programme, completeness of and adherence to its implementation, and relations between appreciation and completeness of implementation.</p> <p>Methods</p> <p>Data were collected among 22 teachers and 1117 students of 13 schools, using student evaluation forms, teacher logbooks, telephone interviews, and classroom observations.</p> <p>Results</p> <p>Results indicate favourable levels of teacher and student appreciation for the programme in general and the revised elements. Girls, first-year students and students with more favourable dietary intakes particularly appreciated individual programme elements. Levels of completeness of implementation were high, but several teachers did not adhere to the intended implementation period. Some moderately strong relations were found between teacher appreciation and completeness of implementation scores.</p> <p>Conclusion</p> <p>We conclude that the revisions have resulted in a programme that was appreciated well, also by the extended target group, and was implemented with a high degree of completeness. Teacher appreciation proved potentially important for completeness of implementation. We identified several aspects requiring improvement, indicating the importance of continued programme updates and repeated evaluation.</p

Dose-Response Relationship of a Web-Based Tailored Intervention Promoting Human Papillomavirus Vaccination: Process Evaluation of a Randomized Controlled Trial

BACKGROUND: In the Netherlands, HPV vaccination uptake remains low. To improve informed decision making (IDM) and HPV vaccination acceptability, we systematically developed an interactive, Web-based tailored intervention for mothers of Dutch girls to-be-invited. OBJECTIVE: The aim of this study is to provide insight into the intervention's working mechanisms by evaluating (1) program use, (2) program acceptability, and (3) the relationship of program use with (a) program acceptability, and (b) intervention effects (i.e., dose-response). METHODS: Only mothers from the intervention arm of a randomized controlled study (RCT) that assessed the effectiveness of the Web-based, tailored intervention were included. They were invited to visit the Web-based intervention between baseline (January 2015, just before access to the intervention) and follow-up (March 2015, prior to the first HPV vaccination). Indicators for program use were time of website use (i.e., duration of intervention exposure) and completeness (i.e., the proportion of all available webpages visited). HPV vaccination uptake registered by Praeventis was used as the primary outcome. Secondary outcomes were informed decision-making (IDM), decisional conflict, and social psychological determinants of HPV vaccination uptake. RESULTS: From the 3995 invited mothers, 2509 mothers (62.80%) logged in. Of these, 2239 mothers (89.24%) visited at least one page of the intervention components. On average, mothers spent 21.39 minutes on the website (SD = 12.41 minutes) and completed 50.04% (SD = 26.18%) of the website. Participants rated the website with a 7.64 on a 10-point scale (SD = 1.39). Program acceptability was significantly associated with completeness (β = 4.36, P < .001), but not with time of website use (β = -.07, P =.77). Intention-to-treat analysis (N = 3,995) showed a significant positive effect of completeness on all outcome measures (P's <.003; Bonferroni corrected alpha=.05/15 factors), including on HPV vaccination uptake. Time of website use had a significant positive effect on all outcomes (P's <.003), except for uptake (P = .195), risk perception when not vaccinated (P = .144), subjective norms (P = .032), and habit (P = .013). CONCLUSIONS: Program use and acceptability of the intervention was adequate. Completeness was positively associated with acceptability. Furthermore, positive effects (i.e., dose-response effects) were found of completeness and time of website use on the mothers IDM, decisional conflict, and almost all of the social-psychological determinants of HPV vaccination acceptability. In addition, the extent to which mothers completed the intervention had a positive impact on their daughters' vaccination uptake. This indicates that the Web-based, tailored intervention fits well with the mothers' needs, and that completeness of use is essential for improving HPV vaccination uptake, acceptability, and IDM. Program use should therefore be promoted. CLINICALTRIAL: Trialregister.nl NTR4795; https://www.trialregister.nl/trial/4795

Dose-Response Relationship of a Web-Based Tailored Intervention Promoting Human Papillomavirus Vaccination:Process Evaluation of a Randomized Controlled Trial

BACKGROUND: In the Netherlands, HPV vaccination uptake remains low. To improve informed decision making (IDM) and HPV vaccination acceptability, we systematically developed an interactive, Web-based tailored intervention for mothers of Dutch girls to-be-invited. OBJECTIVE: The aim of this study is to provide insight into the intervention's working mechanisms by evaluating (1) program use, (2) program acceptability, and (3) the relationship of program use with (a) program acceptability, and (b) intervention effects (i.e., dose-response). METHODS: Only mothers from the intervention arm of a randomized controlled study (RCT) that assessed the effectiveness of the Web-based, tailored intervention were included. They were invited to visit the Web-based intervention between baseline (January 2015, just before access to the intervention) and follow-up (March 2015, prior to the first HPV vaccination). Indicators for program use were time of website use (i.e., duration of intervention exposure) and completeness (i.e., the proportion of all available webpages visited). HPV vaccination uptake registered by Praeventis was used as the primary outcome. Secondary outcomes were informed decision-making (IDM), decisional conflict, and social psychological determinants of HPV vaccination uptake. RESULTS: From the 3995 invited mothers, 2509 mothers (62.80%) logged in. Of these, 2239 mothers (89.24%) visited at least one page of the intervention components. On average, mothers spent 21.39 minutes on the website (SD = 12.41 minutes) and completed 50.04% (SD = 26.18%) of the website. Participants rated the website with a 7.64 on a 10-point scale (SD = 1.39). Program acceptability was significantly associated with completeness (β = 4.36, P < .001), but not with time of website use (β = -.07, P =.77). Intention-to-treat analysis (N = 3,995) showed a significant positive effect of completeness on all outcome measures (P's <.003; Bonferroni corrected alpha=.05/15 factors), including on HPV vaccination uptake. Time of website use had a significant positive effect on all outcomes (P's <.003), except for uptake (P = .195), risk perception when not vaccinated (P = .144), subjective norms (P = .032), and habit (P = .013). CONCLUSIONS: Program use and acceptability of the intervention was adequate. Completeness was positively associated with acceptability. Furthermore, positive effects (i.e., dose-response effects) were found of completeness and time of website use on the mothers IDM, decisional conflict, and almost all of the social-psychological determinants of HPV vaccination acceptability. In addition, the extent to which mothers completed the intervention had a positive impact on their daughters' vaccination uptake. This indicates that the Web-based, tailored intervention fits well with the mothers' needs, and that completeness of use is essential for improving HPV vaccination uptake, acceptability, and IDM. Program use should therefore be promoted. CLINICALTRIAL: Trialregister.nl NTR4795; https://www.trialregister.nl/trial/4795