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Non-responders in a quitline evaluation are more likely to be smokers – a drop-out and long-term follow-up study of the Swedish National Tobacco Quitline

Non-responders in a quitline evaluation are more likely to be smokers – a drop-out and long-term follow-up study of the Swedish National Tobacco Quitline


Titill: Non-responders in a quitline evaluation are more likely to be smokers – a drop-out and long-term follow-up study of the Swedish National Tobacco Quitline
Höfundur: Öhrvik, John
Helgason, Asgeir R.   orcid.org/0000-0002-0569-3067
Nohlert, Eva   orcid.org/0000-0003-1771-4635
Útgáfa: 2016-02-03
Tungumál: Enska
Umfang: 5
Háskóli/Stofnun: Háskólinn í Reykjavík
Reykjavík University
Svið: Viðskiptadeild (HR)
School of Business (RU)
Birtist í: Tobacco Induced Diseases;14(February)
ISSN: 2070-7266
1617-9625 (eISSN)
DOI: 10.1186/s12971-016-0070-2
Efnisorð: Effectiveness; Intention to treat; Non response; Per protocol; Proactive; Reactive; Responder only analysis; Smoking; Telephone; Questionnaire; Reykingar; Fíkn; Félagsleg viðfangsefni; Megindlegar rannsóknir
URI: https://hdl.handle.net/20.500.11815/898

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Tilvitnun:

Nohlert, E., Öhrvik, J., Helgason, Á. R. (2016). Non-responders in a quitline evaluation are more likely to be smokers – a drop-out and long-term follow-up study of the Swedish National Tobacco Quitline. Tobacco Induced Diseases, 14(February), 5. https://doi.org/10.1186/s12971-016-0070-2

Útdráttur:

Background: A previous randomized controlled trial (RCT) of the Swedish National Tobacco Quitline detected no significant differences in smoking cessation outcomes between proactive and reactive services at 12-month follow-up. However, the response rate was only 59 % and non-responders were over-represented in the proactive service. We performed a drop-out analysis to assess the smoking status of initial responders and non-responders. Methods: At 29–48 months after the first call, a postal questionnaire with six questions was sent to 150 random clients from the RCT database, with equal numbers from the proactive and reactive services as well as responders and non-responders at 12-month follow-up. Clients who did not return the questionnaire were contacted by telephone. The outcome measures were point prevalence (PP) and 6-month continuous abstinence (CA), and their associations with response status at 12 months were assessed by logistic regression. Results: The response rate was 74 % (111/150). Abstinence was significantly higher among initial responders than non-responders (PP 54 % vs. 32 %, p = .023 and CA 49 % vs. 21 %, p = .003). The odds ratios for initial responders vs. initial non-responders were, for PP = 2.5 (95 % CI 1.1–5.6, p = .024), and for CA = 3.7 (95 % CI 1.5–8.9, p = .004), after adjusting for proactive/reactive service. Conclusions: Non-responders to a 12-month follow-up smoking cessation questionnaire in a quitline setting were more likely to be smokers 1.5–3 years later. We propose a conservative correction factor of 0.8 for self-reported abstinence in telephone-based cessation studies if the response rate is approximately 55–65 %. Keywords: Effectiveness, Intention-to-treat, Non-response, Per protocol, Proactive, Reactive, Responder-only analysis, Smoking, Telephone, Questionnaire

Leyfi:

© 2016 Nohlert et al. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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