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. 2015 Nov 2;10:154. doi: 10.1186/s13012-015-0336-8

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© Houston et al. 2015

Open AccessThis 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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Fig. 2 — Trial 1: comparing paper-referral and ePortal practice implementation results (patient referrals to the web-assisted tobacco intervention and subsequent patient registration) among 174 practices. Mean number of referral Per practice (95 % confidence interval) and mean percentage referred smokers who registered (95 % confidence interval)