Results and publications

Cervical cancer is the second most prominent cancer among women in Bangladesh, which is mainly caused by persistent infection with high-risk human papillomavirus (hrHPV). This study aims to evaluate impact of hrHPV prevalence on cost-effectiveness of screening with self-sampling hrHPV testing versus visual inspection with acetic acid (VIA) for cervical cancer screening in low- and middle-income countries with Bangladesh as an example.

Methods: A micro-simulation Markov model was developed from a health system perspective in Bangladesh to evaluate the cost-effectiveness of screening with self-sampling hrHPV testing followed by VIA and VIA as primary screening method followed by colposcopy. We compared these strategies in optimal (70%) and realistic (8.7%) uptake scenarios, considering different hrHPV prevalence rates. Key indicators for cost-effectiveness were number of prevented cervical cancers cases and incremental cost-effectiveness ratio (ICER).

Results: The number of cervical cancers cases prevented by screening and cost-effectiveness of screening strategies increased as hrHPV prevalence increased. In both optimal and realistic uptake scenarios, hrHPV test + VIA strategy prevented more cancers than VIA + colposcopy strategy in most instances. Regardless of the uptake, both screening strategies were cost-effective compared to no screening within a hrHPV prevalence range of 2–30%, and the hrHPV test-based strategy was cost-effective compared with VIA-based strategy. When the price of hrHPV test was estimated 50% lower (10 USD), the hrHPV test-based strategy gained more life years at nearly the same cost as the VIA-based strategy.

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Knowledge of risk factors and symptoms of cervical cancer has been found to promote uptake of screening of cervical cancer. Most interventions targeted women without much involvement of men (husbands/decision makers) who are often decision makers in many low- and middle-income countries. This study aimed at assessing baseline knowledge and intended behavior of both women and men to enable design specific targeted messages to increase uptake of cervical cancer screening and promote early detection of women with symptoms.

Methods: This cross-sectional study was conducted in two districts in Western Uganda using the modified African Women Awareness of CANcer (AWACAN) questionnaire. Women aged 30—49 years and their husbands/decision makers were interviewed. Knowledge on risk factors and symptoms, intended behavior and barriers towards participation in cervical cancer screening and treatment were assessed. Descriptive and logistic regression analyses were done to establish the association between knowledge levels and other factors comparing women to men.

Results: A total of 724 women and 692 men were enrolled. Of these, 71.0% women and 67.2% men had ever heard of cervical cancer and 8.8% women had ever been screened. Knowledge of risk factors and symptoms of cervical cancer was high and similar for both women and men. Lack of decision making by women was associated with low knowledge of risk factors (X2 = 14.542; p = 0.01), low education (X2 = 36.05, p < 0.01) and older age (X2 = 17.33, p < 0.01). Men had better help seeking behavior than women (X2 = 64.96, p < 0.01, OR = 0.39, 95% CI: 0.31—0.50) and were more confident and skilled in recognising a sign or symptom of cervical cancer (X2 = 27.28, p < 0.01, OR = 0.52, CI (0.40—0.67).

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Lack of knowledge and understanding of symptoms and risk factors contributes to low screening uptake in Bangladesh. This study explores the knowledge of cervical cancer risk factors and symptoms and measures the association with socio-demographic characteristics among women and household decisionmakers living in hard-to-reach areas of Bangladesh.

Methods: Cross-sectional survey conducted in five districts of Bangladesh among women aged 30 to 60, their husbands, and their mothers-in-law from April to September 2022. Data were collected using a modified version of the validated AWACAN questionnaire tool. The significance level was considered at p-value <0.05 and odds ratios with 95% confidence.

Results: Nearly 50% of participating women in hard-to-reach areas of Bangladesh and their family
decisionmakers had low levels of knowledge of the risk factors and symptoms of cervical cancer. Only 20% of respondents knew about HPV, the most important risk factor for developing cervical cancer. Most respondents were familiar with the terminology of cervical cancer as a disease; however, approximately 40% of respondents did not know that not adhering to cervical cancer screening could be seen as a risk factor. Women do not make decisions about participation in cervical cancer screening on their own. Knowledge of cervical cancer risk factors and symptoms among decisionmakers was significantly associated with higher education and higher household monthly expenditure.

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Visual inspection with acetic acid is limited by subjectivity and a lack of skilled human resource. A decision support system based on artificial intelligence could address these limitations. We conducted a diagnostic study to assess the diagnostic performance using visual inspection with acetic acid under magnification of healthcare workers, experts, and an artificial intelligence algorithm.

Methods: A total of 22 healthcare workers, 9 gynecologists/experts in visual inspection with acetic acid, and the algorithm assessed a set of 83 images from existing datasets with expert consensus as the reference. Their diagnostic performance was determined by analyzing sensitivity, specificity, and area under the curve, and intra- and inter-observer agreement was measured using Fleiss kappa values.

Results: Sensitivity, specificity, and area under the curve were, respectively, 80.4%, 80.5%, and 0.80 (95% CI 0.70 to 0.90) for the healthcare workers, 81.6%, 93.5%, and 0.93 (95% CI 0.87 to 1.00) for the experts, and 80.0%, 83.3%, and 0.84 (95% CI 0.75 to 0.93) for the algorithm. Kappa values for the healthcare workers, experts, and algorithm were 0.45, 0.68, and 0.63, respectively.

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High-risk human papillomavirus (hrHPV) testing has been recommended by the World Health Organization as the primary screening test in cervical screening programs. The option of self sampling for this screening method can potentially increase women’s participation. Designing screening programs to implement this method among underscreened populations will require contextualized evidence.

Methods: PREvention and SCReening Innovation Project Toward Elimination of Cervical Cancer (PRESCRIP-TEC) will use a multi-method approach to investigate the feasibility of implementing a cervical cancer screening strategy with hrHPV self-testing as the primary screening test in Bangladesh, India, Slovak Republic and Uganda. The primary outcomes of study include uptake and coverage of the screening program and adherence to follow-up. These outcomes will be evaluated through a pre-post quasi-experimental study design. Secondary objectives of the study include the analysis of client-related factors and health system factors related to cervical cancer screening, a validation study of an artificial intelligence decision support system and an economic evaluation of the screening strategy.

Discussion: PRESCRIP-TEC aims to provide evidence regarding hrHPV self-testing and the World Health Organization’s recommendations for cervical cancer screening in a variety of settings, targeting vulnerable groups. The main quantitative findings of the project related to the impact on uptake and coverage of screening will be complemented by qualitative analyses of various determinants of successful implementation of screening. The study will also provide decision-makers with insights into economic aspects of implementing hrHPV self-testing, as well as evaluate the feasibility of using artificial intelligence for task-shifting in visual inspection with acetic acid.

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