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. 2017 Dec 21;17:291. doi: 10.1186/s12877-017-0682-2

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© The Author(s). 2017

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. 1 — Interaction plot of Modified Falls Efficacy Scale (MFES) and centre-of-pressure (CoP) velocity-AP and probability of falling at least once in the follow-up period. Low and high falls efficacy represent the 25th and 75th percentile values of the MFES, respectively. Predicted fall risk was computed from a proportional odds model which included the interaction between MFES and CoP velocity-AP, adjusted for age, sex, number of comorbidities, fall history, baseline SPPB, and treatment group assignment (P = 0.014 for interaction). Shaded regions represent 95%CIs for the natural spline-smoothed estimates