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. 2017 Nov 15;48(9):1514–1522. doi: 10.1017/S0033291717003038

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© Cambridge University Press 2017

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 1. — Three Class Model of Depressive Symptoms between 10 and 19 years in the ALSPAC cohort. Note: Class membership is driven by the probability of high depressive symptoms, defined as total SMFQ score 11 or above, at six follow-up points. Class 1 = consistently low symptoms at all six follow-ups (‘No symptoms’). Class 2 = symptoms low in the first two follow-ups but increase subsequently (‘Adolescent-onset symptoms’). Class 3 = consistently high symptoms at all six follow-ups (‘Persistent symptoms’).