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  • Title: Sex differences in COVID-19 vaccine confidence in people living with HIV in Canada.
    Author: Lu J, Vulesevic B, Burchell AN, Singer J, Needham J, Yang Y, Qian H, Chambers C, Samji H, Colmegna I, Del Canto S, Godin GH, Habanyama M, Hui SSC, Kroch A, Mandarino E, Margolese S, Martin C, Owino M, Lau E, Mohammadi T, Zhang W, Pelaez S, Kovacs C, Benko E, Cooper CL, Anis AH, Costiniuk CT, COVAXHIV Study Group.
    Journal: Vaccine X; 2024 Dec; 21():100566. PubMed ID: 39582795.
    Abstract:
    BACKGROUND: Understanding the roots of vaccine confidence in vulnerable populations, such as persons living with HIV (PLWH), is important to facilitate vaccine uptake, thus mitigating infection and spread of vaccine-preventable infectious diseases. In an online survey of PLWH conducted in Canada during winter 2022 (AIDS and Behav 2023), we reported that the overall COVID-19 vaccination uptake rate in PLWH was similar by sex. Here, we examined attitudes and beliefs towards vaccination against COVID-19 based on sex. METHODS: Between February and May 2022, PLWH across Canada were recruited via social media and community-based organizations to complete an online survey consisting of a modified Vaccine Hesitancy Scale (VHS) questionnaire with items from the National Advisory Committee on Immunization Acceptability Matrix. Descriptive statistics were used to summarize participant characteristics and responses to the VHS questionnaire by sex. The effect of biological sex on total VHS score, two subscales ("lack of confidence" and "perceived risk") was assessed separately by linear regression adjusting for other key baseline variables. RESULTS: Of 259 PLWH, 69 (27 %) were females and 189 (73 %) were males. Sixty-six (26 %) of participants self-identified as a woman, 163(63 %) as a man and 28(11 %) as trans/two-spirited/queer/non-binary/agender/other. The mean age (SD) was 47 ± 14 years. Females were less likely to believe that COVID-19 vaccination was: important for his/her own health (71 % vs. 86 %); a good way to protect themselves from infection (68 % vs. 86 %); that getting the COVID-19 vaccine was important for the health of others in his/her community (78 % vs. 91 %); believed recommendations by their doctor/health care provider about COVID-19 vaccines (78 % vs. 88 %); that information about COVID-19 vaccines from public health officials was reliable and trustworthy (56 % vs. 75 % vs); COVID-19 vaccines are effective in preventing COVID-19 infections (61 % vs. 82 %) and that all COVID-19 vaccines offered by government programs in their communities were important for good health (70 % vs. 87 %). Although more males than females felt that new vaccines generally carry more risks than older vaccines (19 % vs 16 %,), fewer males than females endorsed concern about serious side effects of COVID-19 vaccines (33 % vs 45 %).The linear regression model showed females had a significantly higher VHS total score than males (adjusted mean difference 0.38; 95 % confidence interval (CI) 0.13-0.64; p = 0.004), indicating greater COVID-19 vaccine hesitancy among females. It was observed that females had a greater "lack of confidence in vaccines" score than males (adjusted mean difference 0.43; 95 % CI 0.14-0.73; p = 0.004). We did not observe a significant difference in "perceived risk in vaccines" between males and females (adjusted mean difference 0.20; 95 % CI -0.07-0.46; p = 0.1). The inadequate number of participants self-identifying as different from biological sex at birth prevented us from analyzing the VHS score based on gender identity. CONCLUSIONS: Among PLWH, females showed greater COVID-19 vaccine hesitancy than males. Specifically, compared with males, females had a higher level of lack of confidence in vaccines. Fewer females than males believed that COVID-19 vaccines had health benefits at both the personal and societal levels and that recommendations made by their doctor/health care provider and public health officials are reliable and trustworthy. Further investigation into reasons for this difference in opinion still needs to be elucidated. Educational interventions targeted toward females living with HIV are especially needed to increase confidence in vaccination.
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