Relationship of IQ to suicide and homicide rate: an international perspective

IQs were correlated with the z score of suicide rate minus z score of homicide rate using nine regions of the world--established market economies, formerly socialized Europe, India, China, other Asian nations, Sub-Saharan Africa, Latin America/Caribbean, Middle East Crescent, and the USA. Correlations were .85 and .83 with crude rates and age-adjusted rates, respectively. The homicide findings are consistent with previous research in individual countries showing that less intelligent persons commit homicide more often. However, the present findings of a positive correlation between IQ and suicide rates are the opposite of what has been found in the more definitive studies within countries. Explanations for the apparent paradox and for the findings more generally were offered.     

Age-adjusted rates of suicide and homicide and fluoride

Using state data from 1992 and 2000 instead of 1975, the author both confirmed and extended Lester's 1987 study. Like Lester's study, the present replication showed for 1992 (but not 2000) that the more people drinking fluoridated water, the lower the rates of crude and age-adjusted suicide (partial rs: -.25 and -.25, respectively). Crude and age-adjusted rates of homicide in 1992 and 2000 did not change with the fluoridation of public water. Effective interpretation requires more study.     

National character and rates of suicide and homicide

Hofstede's personality scores for workers in 50 nations were not associated with national homicide rates in 1980. Suicide rates were, however, negatively associated with power-distance scores.     

Body Mass Index, suicide, and homicide among inhabitants of the Caribbean Islands

To test the hypothesis that the more overweight and obese a nation, as measured by Body Mass Index, the greater the risk of suicide; mean scores of Body Mass Index for males and females over 15 years of age in 11 Caribbean Islands were not associated with either male or female rates of suicide or homicide with one exception, i.e., when controlling for gross domestic product per capita, mean Body Mass Indices for males were significantly and negatively associated with male rate of homicide.     

Community responses to a suicidal crisis: implications for suicide prevention

We conducted a cross‐sectional, random‐digit‐dial survey to evaluate public responses to a hypothetical question: “If someone you knew was suicidal, what would you do first?” Younger people were more likely to call a suicide hotline, and less likely to go to an emergency room (ER) or call 911; immigrants (in the U.S. <15 years) were more likely to call 911, and less likely to call a suicide hotline; African Americans were more likely to go to the ER and call 911; Hispanics were more likely to call 911 but less likely to call a suicide hotline. These results suggest that public messages about hotlines and emergency options for suicidal patients need to be tailored to relevant population characteristics including age, education, ethnicity, and language preferences.     

National estimates of IQ and suicide and homicide rates

Nations with high estimated mean IQ scores had higher suicide rates and lower homicide rates after control for gross domestic product was introduced, significantly in 1970 but not in 1980.     

Violent death in the West: suicide and homicide in New Mexico, 1958-1987

We examined New Mexico vital statistics data for suicides and homicides among the state's Hispanics, Native Americans, and non-Hispanic whites collected from 1958 to 1987. We found high age-adjusted rates for both suicides and homicides among Hispanic and Native American males, in comparison with rates for non-Hispanic white males. Suicide rates among Native American women were comparatively low, contrasting with their high homicide rates. Homicide rates for males in all three ethnic groups increased substantially over the 30-year study period. We conclude that death from violent causes, both suicide and homicide, is a major public health problem in New Mexico, and disproportionately affects minority males.     

Rates of homicide and suicide on major national holidays

Rates of U.S. homicides and suicides during 1972-1979 were higher on 7 major national holidays except one for homicides and were lower for suicides, except New Year's Day as Lester noted for 1972-1979.     

Gun availability and use of guns for suicide, homicide, and murder in Canada

A reliability check of Lester's (2000b) 1970-1995 time series that examined associations between the availability of firearms and their use for homicide and suicide in Canada. For the period 1974 to 1999, the relative availability of firearms as measured by the rate of accidental death from firearms and the average of the percentages of suicides + homicides using firearms was positively associated with the rate of homicide by firearms but not negatively associated with the rate of homicide by all other methods, and positively associated with the rate of suicide by firearms and negatively associated with the rate of suicide by all other methods. Correlations for the homicide versus murder rates, homicide rate using guns versus murder rate using guns, and homicide rate by all other methods versus murder rate by all other methods were very similar. There was a decrease over time of total suicide and homicide rates and firearm suicide and homicide rates, and with a slight indication of substitution of other methods for suicide.     

Collectivism and rates of personal violence (suicide and homicide)

Homicide rates, but not suicide rates, were associated with an index of collectivism for the states of America in 1992.     

Sexual homicide: Definition,motivation and comparison with other forms of sexual offending

Sexual homicides attract a great deal of attention from the media and the scientific community. Yet, despite this interest, there is no universally accepted definition of the term. This paper explores this issue and looks closely at the motivation behind these offenses. In particular, it explores the role of pathology, anger, and sadistic sexual fantasy. It also explores whether sexual homicide is distinct from other forms of sexual violence, or whether it is better explained as an extreme variant of sexual assault.     

Correlates of rates of suicide and homicide committed by different methods

The social correlates of suicide rates by each method over time in the USA from 1950 to 1985 were very different, suggesting that suicides by different methods may not be sociologically identical behaviors. Homicide rates by each method, however, showed a more consistent pattern of social correlates.     

Premature mortality due to suicide, homicide, and motor vehicle accidents in health service delivery areas: comparison of status Indians in British Columbia, Canada, with all other residents

From each of 15 health regions, potential years of life lost (PYLL) before age 75 for Status Indians is compared for select causes of death with all other residents. Mortality data from 1991 to 2001 for rates of PYLL (standardized to the 1991 population) are from tables of the British Columbia Vital Statistics Agency and First Nations and Inuit Health Branch in 2002. PYLL rate differences and rate ratios were compared for two groups with significance of the former indicated by the 95% confidence interval. Overall, the rates of PYLL for suicide, homicide, and deaths due to motor vehicle accidents were about 224%, 340%, and 248% higher among Status Indians than all other residents. Rates of PYLL for homicide and deaths from motor vehicle accidents among Status Indian women exceeded those of other residents who were men. For suicide, Status Indian men ranked first and all other male residents of British Columbia ranked second.     

Female suicide and wife abuse: a cross-cultural perspective

Data from a number of societies, including North America, indicate that wife abuse may be one of the most significant precipitants of female suicide. Anthropological analysis indicates that in some societies female suicide is a culturally recognized behavior that enables the weak to influence the strong and/or take revenge on those who oppress them. Case studies from West New Britain Province in Papua New Guinea and comparisons with data from other societies suggest that if a woman's support group does not defend her when she is the victim of violence that passes the bounds of normative behavior, her suicide may be revenge suicide, intended to force others to take vengeance on the abusive husband. Research focused on the relationship between domestic violence and female suicide should be a priority of anthropologists as well as suicidologists.     

Bereavement following suicide: A review of the literature

This article summarizes findings from studies concerned with the impact of a suicidal death upon surviving relatives. The limitations of currently available data are discussed, and the need for further research is emphasized. The research for this article was instigated by, and supported by, a grant from Cruse, the National Organisation for the Widowed and their Children. The author is a member of this organization’s Research Sub-Committee. I am indebted to Dr. Dora Black and Dr. Colin Murray Parkes for allowing me access to their collections of papers on bereavement and for their helpful comments on an earlier draft of this article.     

The participation of females in the labor force and rates of personal violence (suicide and homicide)

This study explored the relationship between the participation of married women in the labor force, both part-time and full-time, and rates of personal violence (suicide and homicide) in the continental United States. The participation of married women in the labor force was related to homicide rates. Homicide rates were higher in states where a greater percentage of married women worked full-time. In contrast, suicide rates were more strongly related to indices of social integration (e.g., interstate migration and divorce rates). These results are discussed in terms of differences in social attitudes in the various regions of the United States and the stresses created by women's working.     

Suffering and the sovereignty of God: one Evangelical's perspective on doctor-assisted suicide.

This paper presents my personal convictions, as an Evangelical, regarding the absolute impropriety of doctor-assisted suicide for Christians. They have been "bought with a price" and are owned by Another. Hence, they must always strive to glorify God in their bodies, both in life and in death. Although they crave the well-being of temporal health, when they are ill seek healing or relief, and may well recoil even from the thought of suffering and dying, they should realize that their values and priorities must be rooted in biblical truths and that their well-being is eternal and not temporal, spiritual and not material. As Christians, their attitudes and responses to suffering and dying must be molded by the reality that their Creator and Sovereign will cause all things to work together for their good and that their Lord has called them into a fellowship of His suffering in which they are sustained by dependence upon Him. Hence, for Christians to take their lives in order to escape from the trials and testings ordained by Him would be a failure of love and a breach of trust.