{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T18:18:53Z","timestamp":1788200333526,"version":"build-2803163510"},"reference-count":49,"publisher":"Public Library of Science (PLoS)","issue":"8","license":[{"start":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T00:00:00Z","timestamp":1788134400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100007186","name":"Jonsson Comprehensive Cancer Center","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100007186","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"<jats:p>Mobile phone-based surveys are increasingly used for data collection in global contexts \u2013 and although the strengths and limitations of this methodology in high-income countries are well-documented, less is known about using this approach (particularly for longitudinal data collection) in low- and middle-income countries, where mobile phone ownership has expanded rapidly. In this paper, we leverage data from a parent study about cervical cancer prevention to understand the features associated with retention and loss to follow-up in repeated random-digit dialed mobile phone-based surveys over time in Kenya. From a cohort of 1405 people surveyed in 2022, 1167 were found again in 2024 (83.1%) and 1106 completed the 2024 survey (78.7%). Survey re-completion was significantly associated with older age (versus 17\u221232 year olds: OR 1.63 [95% CI 1.21\u20132.20] for 33\u221238 year olds, OR 1.65 [95% CI 1.22\u20132.22] for 39\u221245 year olds, and OR 2.62 [95% CI 1.84\u20133.72] for \u226546 year olds), male gender (OR 1.44 [95% CI 1.14\u20131.83]), and household income. Only age was significantly associated with our secondary outcome of being retained in the sample for follow-up (regardless of survey re-completion). This study\u2019s high follow-up rate was not substantially different across these aforementioned groups, suggesting that mobile phone-based data collection is a promising approach, even for longitudinal surveys, in diverse global settings. We encourage more research about, and using, this methodology so researchers can better understand, and improve, follow-up and its determinants.<\/jats:p>","DOI":"10.1371\/journal.pone.0354780","type":"journal-article","created":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T17:29:53Z","timestamp":1788197393000},"page":"e0354780","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":0,"title":["Understanding retention in longitudinal surveys conducted by mobile phone in lower-resource contexts: A case study from Kenya"],"prefix":"10.1371","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7862-7928","authenticated-orcid":true,"given":"Corrina","family":"Moucheraud","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-0882-4469","authenticated-orcid":true,"given":"Boyu","family":"Fan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-3869-7177","authenticated-orcid":true,"given":"Guanghao","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-6084-1456","authenticated-orcid":true,"given":"Eric","family":"Ochieng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"George","family":"Ganda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ginger","family":"Golub","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alex","family":"Dahlen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2026,8,31]]},"reference":[{"issue":"5","key":"pone.0354780.ref001","doi-asserted-by":"crossref","first-page":"872","DOI":"10.1093\/poq\/nfr045","article-title":"The 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