Letters Antidepressant use and FDA warnings

Proxy for suicide attempts was inappropriate in study of changes in antidepressant use after FDA warnings

BMJ 2014; 349 doi: https://doi.org/10.1136/bmj.g5644 (Published 09 October 2014) Cite this as: BMJ 2014;349:g5644
  1. Robert O Bartlett, core trainee year 1 psychiatrist1
  1. 1Hergest Unit, Ysbyty Gwynedd, Penrhosgarnedd, Bangor LL57 2PW, UK
  1. robert.bartlett{at}wales.nhs.uk

Lu and colleagues used poisoning by psychotropic agents (international classification of diseases, 9th revision (ICD-9) code 969) as their “proxy for population level suicide attempts.”1 They state that non-fatal poisoning by psychotropic drugs has a positive predictive value of 79.7% for suicide attempts. This is based …

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