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. 2018 Jul 24;41(12):1355–1369. doi: 10.1007/s40264-018-0699-2

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© The Author(s) 2018

Open AccessThis article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial 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.

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Fig. 5 — Time to signal of disproportionate reporting detection for the positive controls in the WEB-RADR reference set, relative to their respective index dates. ‘Social 0.X’ means Twitter/Facebook data with a post-level indicator score threshold of 0.X. Forum posts were extracted with an indicator score threshold of 0.7. Data were collected from April 2012 and onwards. IC Information Component, PRR Proportional Reporting Ratio