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Summary: Background: HPV test-based primary cervical screening is replacing cytology in Canada. In other countries, women's unpreparedness and concerns hindered the transition and post-implementation screening uptake. We investigated psychosocial correlates of intentions of screening in eligible individuals to participate in HPV-based primary cervical screening. Methods: We conducted a nationwide web-based survey of individuals aged 21–70 years in 2022 and oversampled under-screened individuals. We used five Canadian-validated scales to measure HPV test-based screening knowledge, attitudes, and beliefs. Using the multistage Precaution Adoption Process Model, we assessed women's stage of intentions to participate in HPV testing and self-sampling. We estimated associations of psychosocial factors with intentions' stage using multinomial logistic regression. Findings: In both groups (adequately screened n = 1778; under-screened n = 1570), higher HPV knowledge was associated with intention for HPV testing and more personal barriers to the HPV test were associated with lower intentions to participate in HPV testing or use of self-sampling. In both groups, higher self-sampling concerns were associated with lower intentions for self-sampling and higher women's need for autonomy was associated with increased intentions for self-sampling. In the under-screened group, increased age was associated with lower intentions for HPV testing and self-sampling, while living in Canada for

Knowledge of cervical cancer and HPV testing are important factors in proactive and continued engagement with screening and are critical considerations as countries move towards the implementation of HPV-based primary screening programs. However, existing scales measuring knowledge of both cervical cancer and HPV testing are not up to date with the current literature, lack advanced psychometric testing, or have suboptimal psychometric properties. Updated, validated scales are needed to ensure accurate measurement of these factors. Therefore, the aim of this study was to develop and validate two scales measuring cervical cancer knowledge and HPV testing knowledge. A pool of items was generated by retaining relevant existing items identified in a 2019 literature search and developing new items according to themes identified in recent systematic reviews. Items were assessed for relevance by the research team and then refined through seven cognitive interviews with Canadian women. A web-based survey including the remaining items (fourteen for each scale development) was administered to a sample of Canadian women in October and November of 2021. After data cleaning, N = 1027 responses were retained. Exploratory and Confirmatory Factor Analysis were conducted, and Item Response Theory was used to select items. The final cervical cancer knowledge scale (CCKS) and HPV testing knowledge scale (HTKS) were unidimensional, and each consisted of eight items. CFA demonstrated adequate model fit for both scales. The developed scales will be important tools to identify knowledge gaps and inform communications about cervical cancer screening, particularly in the context of HPV-based screening implementation.

Containing the COVID-19 pandemic is dependent on compliance with public health recommendations and mandates which is lower in younger compared to older adults. Furthermore, younger adults have demonstrated lower uptake of COVID-19 vaccines. The aim of this study was to assess preferences for COVID-19 related preventive health measures and vaccination and to explore their association with COVID-19 vaccine acceptability. Canadians aged 18–39 years were invited to participate in a web-based survey in August 2021. We used the Best-Worst-Scaling (BWS) methodology to collect and analyze preference data and multivariable binary logistic regression to estimate associations with vaccine acceptability. Based on 266 complete responses, we found strong preferences for physical distancing and wearing face masks, as compared to general hygiene and respiratory etiquette. High vaccine accessibility independent of the location, receiving successive doses of the same vaccine brand and higher vaccine uptake of people in younger adults’ social circle were highly preferred. Higher preferences for mandates requiring proof of vaccination and altruistic motives focused on protecting others by getting vaccinated were associated with vaccine acceptability. As the COVID-19 pandemic waxes and wanes, studies using larger, nationally representative samples are needed to replicate and validate these results to assess preferences for health behaviors corresponding to the latest recommendations. The use of this methodology could provide public health authorities with a unique opportunity to develop targeted, preference-based messaging that aligns with the latest guidelines to effectively encourage compliance and COVID-19 vaccine uptake.