Chan CP, Lee SS, Wong NS. Adherence of nurses to annual seasonal influenza vaccination over a five-year period. J Hosp Infect. 2021 Feb 25:S0195-6701(21)00076-1
Aim: To assess the adherence pattern of nurses to seasonal influenza vaccination over five years and its associated factors.
Methods: A cross-sectional study was conducted among nurses after the winter influenza season in Hong Kong in March 2019. Based on the influenza vaccine uptakes in the 2014/15-2018/19 seasons, respondents were stratified into three groups: "full adherence"(5 uptakes), "partial adherence"(1-4) and "non-adherence"(0). Stepwise multivariable logistic regression was performed to determine the associations between adherence to annual influenza vaccination, respondents´ characteristics and considerations for vaccination.
Findings: Of 1,306 nurses recruited, a majority were female (88%), with a median age of 36 years (IQR 30-46). Influenza vaccination uptake rate increased from 36% in the 2014/15 to 47% in the 2018/19 season. After stratification, 39%, 40% and 21% were non-, partial and full adherers respectively. Full adherence was significantly associated with female (adjusted odds ratio [aOR] 0.60), aged 40 or over (aOR 2.92), long-term care facility nurse (aOR 0.56) and uptake during studentship (aOR 3.83), local prevalence of seasonal influenza (aOR 0.51), and expert opinion (aOR 4.04).
Conclusions: This study identified a limited proportion of nurses being fully adherent to seasonal influenza vaccination. Monitoring adherence, improving access to vaccine and intervention tailored to the less adherent HCWs are crucial.
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