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Quantitative exponential modelling of copycat suicides: association with mass media effect in South Korea

Published online by Cambridge University Press:  04 February 2014

S. Suh ,
Y. Chang  and
N. Kim
S. Suh
Affiliation:
Korea University Ansan Hospital, Human Genome Institute, Ansan, South Korea Department of Psychiatry, Stanford University Medical Center, Stanford, CA, USA
Y. Chang
Affiliation:
Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Seoul 138-736, South Korea
N. Kim*
Affiliation:
Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Seoul 138-736, South Korea
*
*Address for correspondence: Dr N. Kim, Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine 88, Olympic-ro 43-gil, Seoul 138-736, South Korea. (Email: [email protected])
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Abstract

Background.

There is ample evidence media reporting of celebrity suicides increases copycat suicides. This study had three aims: (a) to quantitatively examine copycat suicides with exponential modelling that predicts the copycat suicide effect of South Korean celebrity suicides; (b) to investigate the association between media effect and subsequent suicides following celebrity deaths; and (c) to investigate the extent in which media influences the increase and rate of decline of copycat suicides following a celebrity suicide.

Methods.

All suicides during 1991–2010 in South Korea were included in this study utilising a nationwide database. Fifteen celebrities were selected based on the frequency of media reports following 1 week after their suicide. The media effect was obtained through the Korean Integrated Newspaper Database System. Exponential curve fits and correlation analyses investigated the quantitative effect of copycat suicides.

Results.

After controlling for baseline number of average suicides, there was a marked increase in the number of suicides following each celebrity suicides, which followed an exponential model. There was a significant correlation between the total number of copycat suicides and number of media following the celebrity suicide (r = 0.74, p < 0.01). There were weak-to-moderate correlations between the amplitude of increase in suicides (r = 0.45, p = 0.09) and rate of decline (r = 0.38, p = 0.16) with the total number of media coverage.

Conclusions.

Copycat suicides following celebrity suicides follow exponential modelling. Additionally, there is a strong media effect between the number of media reports following the days after celebrity suicides and subsequent copycat suicides. This may also be associated with the amplitude and rate of decline of copycat suicides. This suggests that improving media reporting and implementing preventative interventions for vulnerable populations may be important.

Keywords

Celebrity suicidecopycat suicidemedia effectepidemiology
Type
Original Articles
Information
Epidemiology and Psychiatric Sciences , Volume 24 , Issue 2 , April 2015 , pp. 150 - 157
Copyright
Copyright © Cambridge University Press 2014 

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