Article Text

Download PDFPDF

Demographic risk factors in pesticide related suicides in Sri Lanka
  1. E B R Desapriya,
  2. P Joshi,
  3. G Han,
  4. F Rajabali
  1. BC Injury Research and Prevention Unit, Vancouver, Canada;

    Statistics from

    Request Permissions

    If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.

    Suicide rates in Sri Lanka (40 per 100 000) greatly exceed those of the United Kingdom (7.4/100 000), United States (12/100 000), and Germany (15.8/100 000).1,2 A leading method of committing suicide in Sri Lanka is ingestion of pesticides, which are readily available in rural farming households. Self poisoning kills more people in rural Sri Lanka than ischemic heart disease and tropical diseases combined.3 Although acute pesticide poisoning occurs at alarmingly high rates in Sri Lanka, it is also a major problem throughout the developing world. The worldwide incidence is three million cases and 220 000 deaths each year.4

    Suicide attempts tend to be fatal, especially in the rural areas where rescue facilities are seldom available.4 Further reasons for high mortality rates include the toxic nature of the substances involved, lack of antidotes, distances between hospitals and patients, and overburdened medical staff.4

    This study analyzed raw data on pesticide related deaths in search of demographic risk factors contributing to these suicides in Sri Lanka during 2002.


    Data were extracted from the Department of Police in Colombo, Sri Lanka, which reports total suicide case numbers and causes.5 Population health data were provided by the Ministry of Health in Sri Lanka, Population Division.6 Age standardized rates were calculated by multiplying the total case number for a given age group by 100 000 population, using numbers of actual population figures as the denominator.


    Age standardized rates showed differences in pesticide related suicides by gender and age (fig 1). Among Sri Lankan males the rates peaked between 60–64 years and males demonstrated higher pesticide related suicide mortality risk than females (rate ratio = 1.20, 95% confidence interval 1.10 to 1.31).

    Figure 1

    Age standardized rates for pesticide related suicides in Sri Lanka in 2002.


    Pesticide related suicide is a major problem in Sri Lanka where it is the cause of many deaths, particularly among males 40–54 years and in the elderly. Prevention strategies should target this population.

    It is well known that most victims poison themselves with pesticides and herbicides, which are easily available because they are widely used on plantations.7 Few protective measures are taken against ingestion as local populations tend to have the misguided belief that herbicides, pesticides, and toxic seeds do not cause pain when ingested.2,7 The public must be educated about the long and short term effects of pesticides on health, particularly in these high risk populations. Mass media campaigns informing the public of the dangerous after effects of pesticides and proper pesticide handling procedures and storage may help.

    Restrictions on pesticide availability are necessary for further prevention of these suicides. Eddleston et al suggested a model minimum pesticide list for use in developing countries to prevent mortality related to pesticides.8 To be effective on a global level, the World Health Organization and Food and Agriculture Organization of the United Nations need to intervene to motivate local governments to implement this list.8 In addition, governments should use pricing policies and differential taxation policies such as higher taxes and prices for potentially harmful pesticides to control their easy availability.

    Given the complexity of the mechanisms involved in pesticide related suicide, it is likely that no single prevention strategy will combat this critical problem. Rather, a comprehensive and integrated effort involving many domains—the individual, family, agrochemical industry, community, media, and health care system—is needed.