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Feasibility of digital contact tracing in low-income settings - pilot trial for a location-based DCT app

BMC public health, 2023-01, Vol.23 (1), p.146-16, Article 146 [Peer Reviewed Journal]

2023. The Author(s). ;2023. This work is licensed under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;The Author(s) 2023 ;ISSN: 1471-2458 ;EISSN: 1471-2458 ;DOI: 10.1186/s12889-022-14888-x ;PMID: 36670358

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  • Title:
    Feasibility of digital contact tracing in low-income settings - pilot trial for a location-based DCT app
  • Author: Handmann, Eric ; Camanor, Sia Wata ; Fallah, Mosoka P ; Candy, Neima ; Parker, Davidetta ; Gries, André ; Grünewald, Thomas
  • Subjects: Accuracy ; App ; Bluetooth ; Contact ; Contact tracing ; Contact Tracing - methods ; Data transmission ; Digital contact tracing ; Feasibility ; Feasibility Studies ; GPS tracking ; Humans ; Income ; Kennedy, John Fitzgerald (1917-1963) ; Location based ; Location-based services ; Low income ; Mobile Applications ; Pilot Projects ; Poverty ; Power consumption ; Privacy ; Public health ; Public transportation ; Reference systems ; Smartphones ; Software ; Urban areas ; Urban environments
  • Is Part Of: BMC public health, 2023-01, Vol.23 (1), p.146-16, Article 146
  • Description: Data about the effectiveness of digital contact tracing are based on studies conducted in countries with predominantly high- or middle-income settings. Up to now, little research is done to identify specific problems for the implementation of such technique in low-income countries. A Bluetooth-assisted GPS location-based digital contact tracing (DCT) app was tested by 141 participants during 14 days in a hospital in Monrovia, Liberia in February 2020. The DCT app was compared to a paper-based reference system. Hits between participants and 10 designated infected participants were recorded simultaneously by both methods. Additional data about GPS and Bluetooth adherence were gathered and surveys to estimate battery consumption and app adherence were conducted. DCT apps accuracy was evaluated in different settings. GPS coordinates from 101/141 (71.6%) participants were received. The number of hours recorded by the participants during the study period, true Hours Recorded (tHR), was 496.3 h (1.1% of maximum Hours recordable) during the study period. With the paper-based method 1075 hits and with the DCT app five hits of designated infected participants with other participants have been listed. Differences between true and maximum recording times were due to failed permission settings (45%), data transmission issues (11.3%), of the participants 10.1% switched off GPS and 32.5% experienced other technical or compliance problems. In buildings, use of Bluetooth increased the accuracy of the DCT app (GPS + BT 22.9 m ± 21.6 SD vs. GPS 60.9 m ± 34.7 SD; p = 0.004). GPS accuracy in public transportation was 10.3 m ± 10.05 SD with a significant (p = 0.007) correlation between precision and phone brand. GPS resolution outdoors was 10.4 m ± 4.2 SD. In our study several limitations of the DCT together with the impairment of GPS accuracy in urban settings impede the solely use of a DCT app. It could be feasible as a supplement to traditional manual contact tracing. DKRS, DRKS00029327 . Registered 20 June 2020 - Retrospectively registered.
  • Publisher: England: BioMed Central
  • Language: English
  • Identifier: ISSN: 1471-2458
    EISSN: 1471-2458
    DOI: 10.1186/s12889-022-14888-x
    PMID: 36670358
  • Source: GFMER Free Medical Journals
    MEDLINE
    PubMed Central
    Springer Nature OA/Free Journals
    ROAD: Directory of Open Access Scholarly Resources
    ProQuest Central
    DOAJ Directory of Open Access Journals
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