Validation of a Scale to Measure the Perception of SARS-CoV-2 Vaccines Acceptance: The VAC-COVID-19 Scale

Abstract

Since the announcement of the start of SARS-CoV-2 vaccines development, many myths and vaccine opponents have come to the fore. Therefore, in this scenario, it is imperative to have an instrument to assess the population perception of this subject matter.Objective: To validate a scale to measure the perception of SARS-CoV-2 vaccines acceptance.Methods: This is an instrumental and multicentre study, through which a list of possible reasons for whether or not people would be vaccinated was generated. After submitting them to 15 experts, a pilot survey was conducted virtually in a population of almost 3000 participants in the 24 regions of Peru. Descriptive statistics and the exploratory factor analysis (EFA) were conducted using the FACTOR program. Results:The Kaiser-Meyer-Olkin (KMO) coefficient (KMO = 0.917) and the Bartlett's test of sphericity (3343.3; gl = 136; p < 0.001) were conducted. According to EFA results, two factors were found to explain 58.17% of the total variance. The fit indices show that the proposed model is adequate (χ 2 = 826.321; df = 43; p = 0.001; RMR = 0.054; GFI = 0.952; AGFI = 0.927; CFI = 0.946; TLI = 0.931; and RMSEA = 0.078). Finally, Cronbach's α was found to be very satisfactory for the generated scale (α = 0.831; 95% CI = 0.82 -0.84). Conclusion:A simple and efficient scale was validated to assess positive and negative perceptions of SARS-CoV-2 vaccines (the VAC-COVID-19 scale), with a Cronbach's coefficient of 0.831.

Tinjauan Sains dan Agama terhadap Vaksin SARS-Cov-2 : Sebuah Pendekatan Analisis Rasch

“…Model ini menjadikan linearitas skala antara item dan responden ke dalam interval yang relatif sama yaitu logit (log-odds unit) (Andrich, 2005(Andrich, , 2010. Dalam penelitian ini logit akan menghubungkan antara kemampuan responden dalam memberikan kesetujuan dalam menerima vaksin dan tingkat kesulitan item untuk responden dalam memilih jawaban yang memiliki skor kesetujuan lebih tinggi dengan mengadaptasi The Vac-COVID-19 Scale (Mejia et al, 2021). Setelah melakukan seleksi pada nilai item yang punya validitas dan reliabilitas tertinggi dan meminta pendapat dari dua orang ahli (satu dari ahli bahasa dan satu dari ahli psikometri) maka didapat 13 skala akhir yang digunakan dalam penelitian dengan rincian 6 item untuk kesetujuan menerima vaksin dan 7 item untuk ketidaksetujuan menerima vaksin.…”

“…Validitas dan Reabilitas The Vac-COVID-19 Scale autentik dapat diandalkan dengan nilai reliabilitas sebesar 0.831 dengan interval kepercayaan berada di antara 0.82-0.84 (Mejia et al, 2021). (Bond & Fox, 2013, 2015Boone et al, 2014).…”

Aceptación de la de vacunación contra la COVID-19 en mujeres peruanas embarazadas: Actitudes y factores asociados

“…Además, se obtuvo 7 preguntas de los motivos de por qué si y no lo harían. Esto obtenido de un cuestionario validado en el Perú para este fin, que ha demostrado una validez interna y confiabilidad para ver los factores más importantes de los motivos de la vacunación (Mejia et al, 2021).…”

Global stability of an SAIRD epidemiological model with negative feedback

“…Epidemics, due to their dynamic nature, have their basic mathematical modeling that becomes more complex depending on how more factors that characterize each disease are considered. However, there are factors external to the disease that influence its incidence, and they are generated, for example, by prejudices about vaccination campaigns with prior information (negative feedback), as in the case of the negative concept in the population regarding the vaccine against the human papillomavirus (HPV) [ 1 , 2 ] or the SARS-CoV-2 vaccine [ 3 ], sometimes caused by misinformation. In this work, we propose and analyze an epidemic model in ordinary differential equations including an information index function and the effect of negative feedback on the nonpharmaceutical treatment parameter (e.g., quarantine).…”