Abstract
Purpose
Self-sampling is increasingly being used in screening programs, yet no studies to date have examined the impact of bodily characteristics on self-sampling experiences. Our objective was to assess whether body mass index (BMI) and physical disability were associated with anal self-sampling difficulty.
Methods
We recruited sexual minority men (SMM) and trans persons in Milwaukee, Wisconsin to participate in an anal cancer screening study. Between January 2020 and August 2022, 240 participants were randomized to a home (n = 120) or clinic (n = 120) screening arm. Home participants received a mailed at-home anal self-sampling kit and were asked to attend a baseline clinic visit where biometric measurements were collected. Participants were asked to complete a survey about their experience with the kit. This research utilized data from participants who used the at-home kit and completed a baseline clinic visit and post-swab survey (n = 82). We assessed the impact of BMI and physical disability on reported body or swab positioning difficulty.
Results
Most participants reported no or little difficulty with body positioning (90.3%) or swab positioning (82.9%). Higher BMI was significantly associated with greater reported difficulty with body positioning (aOR = 1.10, 95% CI 1.003–1.20, p = 0.04) and swab positioning (aOR = 1.11, 95% CI 1.02–1.20, p = 0.01). Although not significant, participants who said body positioning was difficult had 2.79 higher odds of having a physical disability. Specimen adequacy did not differ by BMI category (p = 0.76) or physical disability (p = 0.88).
Conclusion
Anal self-sampling may be a viable option to reach obese persons who may be more likely to avoid screening due to weight-related barriers.
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Data availability
The datasets generated during the current study are not publicly available.
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Acknowledgments
We would like to thank the study participants, the community advisory board, and the PAC Study Team (Bridgett Brzezinski, Madison Humphry, Cameron Liebert, Esmeralda Lezama-Ruiz, Maritza Pallo, and Christopher Ajala). We also thank the Medical College of Wisconsin Tissue Bank for specimen processing and COPAN Italia S.p.A. for donating some of the swabs used in this study.
Funding
This work was supported by the National Cancer Institute of the National Institutes of Health [R01CA215403 to AGN] and Clinical and Translational Science Institute grant support [2UL1TR001436]. These funding entities had no involvement in the design, collection, analysis, or interpretation of data, writing of this report, or decision to submit this research for publication. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.
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Jenna Nitkowski: writing—original draft, methodology, formal analysis. Maria Fernandez: methodology, writing—review and editing. Tim Ridolfi: writing—review and editing. Elizabeth Chiao: writing—review and editing. Anna Giuliano: writing—review and editing. Vanessa Schick: methodology, writing—review and editing. Michael D. Swartz: methodology, writing—review and editing. Jennifer S. Smith: methodology, writing—review and editing. Alan G. Nyitray: conceptualization, methodology, writing—review and editing, supervision, project administration, funding acquisition.
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Informed consent was obtained from all study participants and study activities were approved by the institution’s human research protections committee (protocol #PRO00032999).
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Nitkowski, J., Fernandez, M.E., Ridolfi, T. et al. The impact of body mass index and physical disability on home-based anal self-sampling. Cancer Causes Control 35, 161–166 (2024). https://doi.org/10.1007/s10552-023-01775-y
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DOI: https://doi.org/10.1007/s10552-023-01775-y