Factors associated with the uptake of seasonal influenza vaccination in older and younger adults: a large, population-based survey in Beijing, China

Abstract

ObjectivesThe present study aimed to estimate the influenza vaccination coverage rate in Beijing, China, and identify its determinants in older and younger adults.MethodsA survey was conducted among Chinese adults using a self-administered, anonymous questionnaire in May–June 2015. The main outcome was seasonal influenza vaccination uptake. Multivariate logistic regression models were performed to identify factors associated with uptake.ResultsA total of 7106 participants completed the questionnaire. The overall coverage rate was 20.6% (95% CI 19.7% to 21.5%) in the 2014/2015 influenza season. Lower education (older adults: OR 1.6; 95% CI 1.2 to 2.1; younger adults: OR 1.9; 95% CI 1.4 to 2.6), having a chronic illness (older adults: OR 1.9; 95% CI 1.5 to 2.4; younger adults: OR 1.4; 95% CI 1.2 to 1.7) and recommendations from healthcare workers (older adults: OR 5.4; 95% CI 3.9 to 7.4; younger adults: OR 4.5; 95% CI 3.7 to 5.4) were positively associated with uptake; perceived side effects of vaccination had a negative impact (older adults: OR 0.6; 95% CI 0.4 to 0.7; younger adults: OR 0.8; 95% CI 0.7 to 1.0). Perceived susceptibility to influenza (OR 1.5; 95% CI 1.2 to 2.0) and awareness of the free influenza vaccine policy (OR 1.9; 95% CI 1.2 to 2.9) were only associated with vaccine uptake in older adults, while perceived effectiveness of vaccination (OR 2.2; 95% CI 1.7 to 2.8) was only a predictor for younger adults. Older adults were more likely to receive recommendations from healthcare professionals and perceive the severity of seasonal influenza, and less likely to worry about side effects of vaccination.ConclusionThe influenza vaccination coverage rate was relatively low in Beijing. Apart from free vaccinations for older adults, age disparity in the rate between older and younger adults (48.7% vs 16.0%) may be explained by differing professional recommendations and public perceptions. Vaccination campaigns targeting increasing professional recommendations and public perceptions should be implemented in the coming years.

Determinants of influenza vaccination among a large adult population in Quebec

“…As described in other studies, 13,14 having received a recommendation from a healthcare professional is a strong determinant of influenza vaccination. We also found that having consulted a conventional healthcare professional over the last 12 months, such as a family doctor or a nurse was linked to influenza vaccination.…”

Willingness to accept a future influenza A(H7N9) vaccine in Beijing, China

“…The participants were classified into ten subgroups according to residence (urban or suburban) and different age groups (18-29, 30-39, 40-49, 50-59 and !60 years). The formula n = l a 2  p  (1 À p)/d 2  deff was used to estimate the sample size per subgroup, based on an a error of 5%, the rate of residents' willingness to accept a future H7N9 vaccine in the general population of Beijing (p) = 50%, maximum permissible error (d) = 0.1p, and the design effect of complex sampling (deff) = 1.5 [18,19]. We estimated a sample size of 576 participants per subgroup.…”

“…In this study, participants were recruited by a multistage stratified sampling approach [18][19][20]. Initially, three urban districts and three suburban districts were randomly selected to be sampled.…”

Investigating Italian parents' vaccine hesitancy: A cross-sectional survey

“…3,4 It is well recognised that vaccine uptake may be greatly influenced by multiple factors such as, for example, lack of recommendation by general practitioners, concerns about vaccination effectiveness and safety, lack of knowledge and information, low perception of risk, difficult access to preventive activities, and socio-economic predictors. [5][6][7][8][9][10] Among the userrelated determinants affecting decisions about whether to vaccinate, parents' vaccine hesitancy represents a recent and growing concern in developed and developing countries. 11 It is well known that vaccine hesitancy refers to all kind of concerns that parents express by refusing some vaccines, delaying vaccines or accepting others, but they are unsure of doing so, despite availability of services and it is complex and context specific, varying across time, place, and vaccines.…”