For this kind of study, I think mixed methods will be the better selection. To get to know the social and behavioral challenges of not using the bednets, a qualitative study should be also undertaken. In-depth interviews and focus group discussions can be utilized to better explore and understand the issues and underlying factors around using bednets for prevention of the malaria. Some other community engagement to understand their perspectives on bednets usage and observational studies within the community can also provide insights into social norms, cultural beliefs, and practical challenges that can be also applicable to the study.
One of the malaria studies along the Thai-Myanmar border also used the mixed method to assess the utilization of insecticide-treated net (ITN) or long-lasting insecticidal net (LLIN). Semi-structured interviews were conducted with selected participants, thematic analysis approach was used, which helped to understand the reasons for the use or non-use of bed nets among community members at risk of malaria along the Thai-Myanmar border.
Reference:
Pooseesod, K., Parker, D. M., Meemon, N., Lawpoolsri, S., Singhasivanon, P., Sattabongkot, J., … & Phuanukoonnon, S. (2021). Ownership and utilization of bed nets and reasons for use or non-use of bed nets among community members at risk of malaria along the Thai-Myanmar border. Malaria journal, 20, 1-12.