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Total recall in the SCAMP cohort: Validation of self-reported mobile phone use in the smartphone era

Mobile phone use, predominantly smartphones, is almost ubiquitous amongst both adults and children. However adults and children have different usage patterns. A major challenge with research on mobile phone use is the reliability of self-reported phone activity for accurate exposure assessment. We i...

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Autores principales: Mireku, Michael O., Mueller, William, Fleming, Charlotte, Chang, Irene, Dumontheil, Iroise, Thomas, Michael S.C., Eeftens, Marloes, Elliott, Paul, Röösli, Martin, Toledano, Mireille B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5773244/
https://www.ncbi.nlm.nih.gov/pubmed/29096315
http://dx.doi.org/10.1016/j.envres.2017.10.034
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author Mireku, Michael O.
Mueller, William
Fleming, Charlotte
Chang, Irene
Dumontheil, Iroise
Thomas, Michael S.C.
Eeftens, Marloes
Elliott, Paul
Röösli, Martin
Toledano, Mireille B.
author_facet Mireku, Michael O.
Mueller, William
Fleming, Charlotte
Chang, Irene
Dumontheil, Iroise
Thomas, Michael S.C.
Eeftens, Marloes
Elliott, Paul
Röösli, Martin
Toledano, Mireille B.
author_sort Mireku, Michael O.
collection PubMed
description Mobile phone use, predominantly smartphones, is almost ubiquitous amongst both adults and children. However adults and children have different usage patterns. A major challenge with research on mobile phone use is the reliability of self-reported phone activity for accurate exposure assessment. We investigated the agreement between self-reported mobile phone use data and objective mobile operator traffic data in a subset of adolescents aged 11–12 years participating in the Study of Cognition, Adolescents and Mobile Phones (SCAMP) cohort. We examined self-reported mobile phone use, including call frequency, cumulative call time duration and text messages sent among adolescents from SCAMP and matched these data with records provided by mobile network operators (n = 350). The extent of agreement between self-reported mobile phone use and mobile operator traffic data use was evaluated using Cohen's weighted Kappa (ĸ) statistics. Sensitivity and specificity of self-reported low (< 1 call/day, ≤ 5 min of call/day or ≤ 5 text messages sent/day) and high (≥ 11 calls/day, > 30 min of call/day or ≥ 11 text messages sent /day) use were estimated. Agreement between self-reported mobile phone use and mobile operator traffic data was highest for the duration spent talking on mobile phones per day on weekdays (38.9%) and weekends (29.4%) compared to frequency of calls and number of text messages sent. Adolescents overestimated their mobile phone use during weekends compared to weekdays. Analysis of agreement showed little difference overall between the sexes and socio-economic groups. Weighted kappa between self-reported and mobile operator traffic data for call frequency during weekdays was κ = 0.12, 95% CI 0.06–0.18. Of the three modes of mobile phone use measured in the questionnaire, call frequency was the most sensitive for low mobile phone users on weekdays and weekends (77.1, 95% CI: 69.3—83.7 and 72.0, 95% CI: 65.0–78.4, respectively). Specificity was moderate to high for high users with the highest for call frequency during weekdays (98.4, 95% CI: 96.4–99.5). Despite differential agreement between adolescents’ self-reported mobile phone use and mobile operator traffic data, our findings demonstrate that self-reported usage adequately distinguishes between high and low use. The greater use of mobile smartphones over Wi-Fi networks by adolescents, as opposed to mobile phone networks, means operator data are not the gold standard for exposure assessment in this age group. This has important implications for epidemiologic research on the health effects of mobile phone use in adolescents.
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spelling pubmed-57732442018-02-01 Total recall in the SCAMP cohort: Validation of self-reported mobile phone use in the smartphone era Mireku, Michael O. Mueller, William Fleming, Charlotte Chang, Irene Dumontheil, Iroise Thomas, Michael S.C. Eeftens, Marloes Elliott, Paul Röösli, Martin Toledano, Mireille B. Environ Res Article Mobile phone use, predominantly smartphones, is almost ubiquitous amongst both adults and children. However adults and children have different usage patterns. A major challenge with research on mobile phone use is the reliability of self-reported phone activity for accurate exposure assessment. We investigated the agreement between self-reported mobile phone use data and objective mobile operator traffic data in a subset of adolescents aged 11–12 years participating in the Study of Cognition, Adolescents and Mobile Phones (SCAMP) cohort. We examined self-reported mobile phone use, including call frequency, cumulative call time duration and text messages sent among adolescents from SCAMP and matched these data with records provided by mobile network operators (n = 350). The extent of agreement between self-reported mobile phone use and mobile operator traffic data use was evaluated using Cohen's weighted Kappa (ĸ) statistics. Sensitivity and specificity of self-reported low (< 1 call/day, ≤ 5 min of call/day or ≤ 5 text messages sent/day) and high (≥ 11 calls/day, > 30 min of call/day or ≥ 11 text messages sent /day) use were estimated. Agreement between self-reported mobile phone use and mobile operator traffic data was highest for the duration spent talking on mobile phones per day on weekdays (38.9%) and weekends (29.4%) compared to frequency of calls and number of text messages sent. Adolescents overestimated their mobile phone use during weekends compared to weekdays. Analysis of agreement showed little difference overall between the sexes and socio-economic groups. Weighted kappa between self-reported and mobile operator traffic data for call frequency during weekdays was κ = 0.12, 95% CI 0.06–0.18. Of the three modes of mobile phone use measured in the questionnaire, call frequency was the most sensitive for low mobile phone users on weekdays and weekends (77.1, 95% CI: 69.3—83.7 and 72.0, 95% CI: 65.0–78.4, respectively). Specificity was moderate to high for high users with the highest for call frequency during weekdays (98.4, 95% CI: 96.4–99.5). Despite differential agreement between adolescents’ self-reported mobile phone use and mobile operator traffic data, our findings demonstrate that self-reported usage adequately distinguishes between high and low use. The greater use of mobile smartphones over Wi-Fi networks by adolescents, as opposed to mobile phone networks, means operator data are not the gold standard for exposure assessment in this age group. This has important implications for epidemiologic research on the health effects of mobile phone use in adolescents. Elsevier 2018-02 /pmc/articles/PMC5773244/ /pubmed/29096315 http://dx.doi.org/10.1016/j.envres.2017.10.034 Text en © 2017 The Authors http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mireku, Michael O.
Mueller, William
Fleming, Charlotte
Chang, Irene
Dumontheil, Iroise
Thomas, Michael S.C.
Eeftens, Marloes
Elliott, Paul
Röösli, Martin
Toledano, Mireille B.
Total recall in the SCAMP cohort: Validation of self-reported mobile phone use in the smartphone era
title Total recall in the SCAMP cohort: Validation of self-reported mobile phone use in the smartphone era
title_full Total recall in the SCAMP cohort: Validation of self-reported mobile phone use in the smartphone era
title_fullStr Total recall in the SCAMP cohort: Validation of self-reported mobile phone use in the smartphone era
title_full_unstemmed Total recall in the SCAMP cohort: Validation of self-reported mobile phone use in the smartphone era
title_short Total recall in the SCAMP cohort: Validation of self-reported mobile phone use in the smartphone era
title_sort total recall in the scamp cohort: validation of self-reported mobile phone use in the smartphone era
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5773244/
https://www.ncbi.nlm.nih.gov/pubmed/29096315
http://dx.doi.org/10.1016/j.envres.2017.10.034
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