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. 2011 Dec 20;1(2):e000248. doi: 10.1136/bmjopen-2011-000248

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© 2011, Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-commercial License, which permits use, distribution, and reproduction in any medium, provided the original work is properly cited, the use is non commercial and is otherwise in compliance with the license. See: http://creativecommons.org/licenses/by-nc/2.0/ and http://creativecommons.org/licenses/by-nc/2.0/legalcode.

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Mean Symptom Checklist 90 (SCl-90)-TOT, Impact of Event Scale (IES) and Beck Depression Inventory (BDI) II across the time periods. Gender-adjusted mean SCL-90-TOT, IES and BDI scores with 95% CIs estimated using linear mixed modelling. There is a significant downward trend of the gender-adjusted means (p=0.001, p<0.0005 and p=0.002, tests against trend).