Seasonal affective disorder: Part 1 – history, epidemiology, aetiology and diagnosis

by Professor John M. Eagles and Dr Allen J. Shand


Last reviewed: February 2017


The idea that our well-being fluctuates with the seasons has been around for literally thousands of years, but it was only in the late 1980s that Norman Rosenthal and colleagues gave a name to seasonal affective disorder or SAD.


In this module, we will look at:


  • the history and evolution of SAD


  • the epidemiology and aetiology of SAD


  • symptoms of SAD and diagnosis.


Start the module

If you like this module, you may also be interested in:


Seasonal affective disorder (SAD): Part 2 management by Professor John M. Eagles and Dr Allen J. Shand


Managing stress and avoiding burnout: Part 1 and Part 2 by Dr Sunil Raheja



BJPsych Advances: related articles for CPD Online



Related Advances articles


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Please note that this module does not cover the management of SAD. However, it is designed to be read in conjunction with the second module: Seasonal affective disorder (SAD): Part 2 management which covers the management of SAD in detail.



© 2018 Royal College of Psychiatrists