Yik-wa Law

Suicide in Hong Kong: a case-control psychological autopsy study

BACKGROUNDnThe relative contribution of psychosocial and clinical risk factors to suicide among Chinese populations is an important issue. In Hong Kong, this issue requires vigorous examination in light of a 50% increase in suicide rate between 1997 and 2003.nnnMETHODnUsing a case-control psychological autopsy method, 150 suicide deceased were compared with 150 living controls matched by age and gender. Semi-structured interviews were conducted with the next-of-kin of the subjects. Data were collected on a wide range of potential risk and protective factors, including demographic, life event, clinical and psychological variables. The relative contribution of these factors towards suicide was examined in a multiple logistic regression model.nnnRESULTSnSix factors were found to significantly and independently contribute to suicide: unemployment, indebtedness, being single, social support, psychiatric illness, and history of past attempts.nnnCONCLUSIONSnBoth psychosocial and clinical factors are important in suicides in Hong Kong. They seem to have mediated suicide risk independently. In addition, socio-economic adversities seem to have played a relatively important role in the increasing suicide rate in Hong Kong.

Evaluating the effectiveness of barrier installation for preventing railway suicides in Hong Kong

BACKGROUNDnRailway suicide is a serious mortality issue. Most attempters are unmarried psychotic young men under psychiatric care having a high level of lethal intent. Installation of platform screen doors (PSDs) to limit access to the track has been suggested as an effective way for prevention. This study aims to examine the effectiveness of installing PSDs for preventing railway suicides; any sign of substitution of suicide location; and changes in psychiatric profile of suicide deceased after the PSD installation in the subway system of Hong Kong.nnnMETHODSnCases of railway suicide and related information from 1997 to 2007 were provided by the railway operators and the Coroners Court. The effectiveness of installing PSDs was assessed through a quasi-experimental setting. Poisson regression and chi-squared test were used.nnnRESULTSnOver the 11-year study period, a total of 76 railway suicide cases (0.71% of all suicides) were reported. A significant reduction of 59.9% (p=0.0003) in railway suicides was found after the PSD installation. Analyses confirmed that there was no significant sign of substitution by displacing potential attempters to unsealed platforms (p=0.9051). Those having psychosis would be better protected as no suicide cases with such psychiatric background were reported after the installation of PSDs.nnnLIMITATIONSnIt has not considered the potential economic benefits of PSD. It is difficult if not possible to examine whether the potential attempters would substitute to an alternative method of suicide.nnnCONCLUSIONSnThis study shows that PSDs can effectively prevent suicides with no substitution by delethalizing the image and altering peoples perception about the desirability of railway suicide. Railway operators should extend the coverage of PSD to all railway stations in Hong Kong without any delay.

Restricting the means of suicide by charcoal burning

We conducted an exploratory controlled trial to examine the efficacy of restricting access to charcoal in preventing suicides from carbon monoxide poisoning by charcoal burning in Hong Kong. All charcoal packs were removed from the open shelves of major retail outlets in the intervention region for 12 months; in the control region, charcoal packs were displayed as usual. The suicide rate from charcoal burning was reduced by a statistically significant margin in the intervention region (P<0.05) but not in the control region. We observed no significant change in the suicide rate using other methods in either location.

Suicide among adults aged 30–49: A psychological autopsy study in Hong Kong

BackgroundA surge in suicide rates in middle age people in Hong Kong and many Asian countries was recently observed. However, there is a paucity of suicide research on this subgroup of people in Asia.MethodsThe next-of-kin of 85 suicide cases and 85 community subjects aged 30–49 years were interviewed by a psychological autopsy approach. Information was triangulated by interview notes, coroners court files, and police investigation reports.ResultsA multiple logistic regression analysis identified the following risk factors for suicide among the middle age people in Hong Kong: the presence of at least one psychiatric disorder (OR = 37.5, 95% CI 11.5–121.9, p < 0.001), indebtedness (OR = 9.4, 95% CI 2.2–40.8, p < 0.01), unemployment (OR = 4.8, 95% CI 1.3–17.5, p < 0.05), never married (OR = 4.2, 95% CI 1.1–16.3, p < 0.05), and lived alone (OR = 3.9, 95% CI 1.2–13.4, p < 0.05).ConclusionThe data show that socio-economical factors had a strong impact on suicide in the target group. Further research is needed to explore any positive qualities that protect the middle-aged from suicide. The prevention of suicide in the middle-aged requires multiple strategies.

Suicidality in Chinese adolescents in Hong Kong: the role of family and cultural influences

BackgroundAdolescent suicidal ideation has found to predict suicidal behaviors and psychopathology in adulthood. Previous studies focused solely on the medical and environmental risk factors, which were insufficient to give a holistic picture of adolescent suicidality.ObjectivesTo assess the role of affective and cognitive attributes in the identification and prevention of adolescent suicidal ideation.MethodA community sample of 511 participants (age 15–19xa0years) were asked to indicate their suicidality in the 12xa0months and in their lifetime. Generalized estimating equation regression models were used to examine the effect of psychosocial and socio-environmental correlates in relation to adolescent suicidal ideation.ResultsThe data show that perceived responsibilities for family was the only protective factor, while a coping mechanism by behavioral disengagement, severity of depressive symptoms, a history of deliberate self-harm, chronic physical illness or pain, media reporting of suicide news, and low household income were the risk factors for adolescent suicidal ideation.ConclusionsThe results suggest that a multilayer effort for preventing adolescent suicide is needed by providing support for children in deprived families; enhancing life skills in the teens; strengthening family relationship; improving mental and health services; and promoting responsible media reporting on suicide.

Newspaper Reporting of Suicide Cases in Hong Kong

This study addresses the concerns over newspapers reporting of suicide cases in Hong Kong, SAR (Special Administrative Region), using the WHO guidelines on the reporting of suicide news as a reference for comparison. We compared the official suicide information extracted from the Coroners Court for the year 2000 with newspaper reports on suicides taken from five major Chinese local newspapers, which accounted for about 80% of the total circulation in Hong Kong. The type of newspaper reporting on suicides was also examined. Newspapers tended to report on those suicide victims who suffered relationship problems, whereas those who had family problems were significantly underreported. Among the suicides reported in the newspapers, 6.2% were found on the front page and the majority of the reports were presented pictorially. The reporting of suicides was selective and the coverage was incomplete, with student suicides reported excessively. The method of reporting for Hong Kong newspapers was not in line with the recommendations of the WHO or international best practices on presenting suicide news. For this reason we recommend a partnership approach with active participation from the media on suicide prevention so that communication professionals can proactively participate in suicide prevention work more effectively.

Social and economic burden of suicides in Hong Kong SAR: A year of life lost perspective

The paper proposes to use the years-of-life-lost method (YLL) in assessing the social and economic burden of suicides in Hong Kong SAR. The YLL from suicide by age group in 1981-2002 is calculated based on the standard set by World Health Organization (WHO). It shows that the middle age group (25-39) contributed most to the burden of disease in Hong Kong. The proportion of older adults suicides is about 25% of the total number of suicides but its disease burden is less than 6% in terms of the YLL. Though the group aged 25-39 contributed disproportionately to the total YLL from suicide, the prevention effort for this particular group has been very much neglected and needs to be strengthened. It illustrates that use of YLL could provide a new viewpoint for setting up public health policies.

Accessing suicide-related information on the internet: a retrospective observational study of search behavior

Background The Internet’s potential impact on suicide is of major public health interest as easy online access to pro-suicide information or specific suicide methods may increase suicide risk among vulnerable Internet users. Little is known, however, about users’ actual searching and browsing behaviors of online suicide-related information. Objective To investigate what webpages people actually clicked on after searching with suicide-related queries on a search engine and to examine what queries people used to get access to pro-suicide websites. Methods A retrospective observational study was done. We used a web search dataset released by America Online (AOL). The dataset was randomly sampled from all AOL subscribers’ web queries between March and May 2006 and generated by 657,000 service subscribers. Results We found 5526 search queries (0.026%, 5526/21,000,000) that included the keyword suicide. The 5526 search queries included 1586 different search terms and were generated by 1625 unique subscribers (0.25%, 1625/657,000). Of these queries, 61.38% (3392/5526) were followed by users clicking on a search result. Of these 3392 queries, 1344 (39.62%) webpages were clicked on by 930 unique users but only 1314 of those webpages were accessible during the study period. Each clicked-through webpage was classified into 11 categories. The categories of the most visited webpages were: entertainment (30.13%; 396/1314), scientific information (18.31%; 240/1314), and community resources (14.53%; 191/1314). Among the 1314 accessed webpages, we could identify only two pro-suicide websites. We found that the search terms used to access these sites included “commiting suicide with a gas oven”, “hairless goat”, “pictures of murder by strangulation”, and “photo of a severe burn”. A limitation of our study is that the database may be dated and confined to mainly English webpages. Conclusions Searching or browsing suicide-related or pro-suicide webpages was uncommon, although a small group of users did access websites that contain detailed suicide method information.

Socio-economic and psychological correlates of suicidality among Hong Kong working-age adults: results from a population-based survey

BACKGROUNDnThe global toll of suicide is estimated to be one million lives per year, which exceeded the number of deaths by homicide and war combined. A key step to suicide prevention is to prevent less serious suicidal behaviour to preclude more lethal outcomes. Although 61% of the worlds suicides take place in Asia and the suicide rates among middle age groups have been increasing since the economic crisis in many Asian countries, population-based studies of suicidal behaviour among working-age adults in non-western communities are scarce.nnnMETHODnData from a population-based survey with 2015 participants were used to estimate the prevalence of suicidal ideation and behaviour among the working-age population in Hong Kong, and to study the associated socio-economic and psychological correlates. We focused particularly on potential modulating factors between life-event-related factors and suicidal ideation.nnnRESULTSnSix per cent of the Hong Kong population aged 20-59 years considered suicide in the past year, while 1.4% attempted suicide. Hopelessness, reasons for living, and reluctance to seek help from family and friends had direct association with past-year suicidal ideation. Reasons for living were found to moderate the effect of perceived stress on suicidal ideation.nnnCONCLUSIONSnSuicidality is a multi-faceted problem that calls for a multi-sectored, multi-layered approach to prevention. Prevention programmes can work on modulating factors such as reasons for living to reduce suicidal risk in working-age adults.

The prevalence and correlates of severe social withdrawal (hikikomori) in Hong Kong: A cross-sectional telephone-based survey study

Background: Severe social withdrawal behaviors among young people have been a subject of public and clinical concerns. Aims: This study aimed to explore the prevalence of social withdrawal behaviors among young people aged 12–29u2009years in Hong Kong. Methods: A cross-sectional telephone-based survey was conducted with 1,010 young individuals. Social withdrawal behaviors were measured with the proposed research diagnostic criteria for hikikomori and were categorized according to the (a) international proposed duration criterion (more than 6u2009months), (b) local proposed criterion (less than 6u2009months) and (c) with withdrawal behaviors but self-perceived as non-problematic. The correlates of social withdrawal among the three groups were examined using multinomial and ordinal logistic regression analyses. Results: The prevalence rates of more than 6u2009months, less than 6u2009months and self-perceived non-problematic social withdrawal were 1.9%, 2.5% and 2.6%, respectively. In terms of the correlates, the internationally and locally defined socially withdrawn youths are similar, while the self-perceived non-problematic group is comparable to the comparison group. Conclusions: The study finds that the prevalence of severe social withdrawal in Hong Kong is comparable to that in Japan. Both groups with withdrawal behaviors for more or less than 6u2009months share similar characteristics and are related to other contemporary youth issues, for example, compensated dating and self-injury behavior. The self-perceived non-problematic group appears to be a distinct group and the withdrawal behaviors of its members may be discretionary.