From: The socio-environmental determinants of railway suicide: a systematic review
Study Number | Author(s) (Date) | Setting | Study design | Population/sample and observation period | Outcome variables | Socio-environmental factor(s) of interest | Significant relationships between study factors and outcomes |
---|---|---|---|---|---|---|---|
Non-intervention studies | |||||||
1 | van Houwelingen, C., et al. (2013) [27] | Railway systems in the Netherlands and Germany | Ecological study, comparing Dutch and German railway suicides in terms of railway and population parameters. | 1475 Dutch and 6105 German railway suicides in 2000 – 2007 | Railway suicides | • Railway length | Positive association: |
• Train frequency | • Train frequency (RR = 0.74) | ||||||
• Number of train passengers | • Population density (RR = 0.59) | ||||||
No association: | |||||||
• Population density | • Railway length (RR = 1.49) | ||||||
• Number of passengers (RR = 1.20) | |||||||
2 | Hegerl, U., et al. (2013) [28] & Ladwig, K.–H., et al. (2012) [29] | Railway system, Germany | Quasi experimental, ecological study, comparing railway suicidal behaviours before and after the railway suicide incident. | 310 railway suicidal behaviours in index period of 2006–2008, 188 in index period of 2009 (Index period = 11th November to 31st December of the year). | Railway suicides and suicide attempts | Railway suicide of the famous German football goal-keeper. | • Railway suicidal behaviours in the index period increased by 1.81 (IR), after adjusted for daily temperature. |
• Railway suicidal behaviours increased by 2.2 (IR) after 28 days of the incidence, after adjusted for daily temperature. | |||||||
• Railway suicidal behaviours increased by 18.8% in the following two years. | |||||||
3 | Niederkrotenthaler, T., et al. (2012) [30] | Subway system, Vienna, Austria | Ecological study, measuring the associations between station characteristics and subway suicidal behaviours. | 107 subway suicide attempts and 185 subway suicides in 1979 – 2009 | Railway suicides and suicide attempts | • Presence of a surveillance unit | Positive association: |
• Train types | • Presence of a surveillance unit (RRs = 1.65, RRa = 1.93) | ||||||
• Station construction on the street level versus other construction | |||||||
• Distance between stations | • Faster train (associated with railway suicides after full adjustment RRsf = 3.53, but not associated with railway suicide attempts) | ||||||
• Distance between a station to historical sites | • Number of stations operated in extensive media reporting period (RRs =1.82, RRa = 1.71) | ||||||
• Number of stations operated in the years of extensive media reporting | • Drug scene (RRs = 1.49, RRa = 2.56) | ||||||
• Number of train passengers | • Number of train passengers (RRs = 1.02, RRa = 1.03) | ||||||
• Distance between a station to historical sites (only for railway suicide attempts, RRa = 1.78) | |||||||
• Station used as local drug scene | No association: | ||||||
• Socioeconomic status of the population in the station’s neighbourhood | • Station construction | ||||||
• Distance between stations | |||||||
• Socio-economic status of station’s neighbourhood | |||||||
4 | Kunrath, S., Baumert, J., & Ladwig, K-H. (2011) [31] | Railway system, Germany | Quasi experimental, ecological study, comparing railway suicidal behaviours before and after the presumed railway suicide incident. | 747 railway suicidal acts from December to March in 2004–2007 Index period: first 2 months after the presumed railway suicide incident (January and February 2007). | Railway suicides and suicide attempts | Media coverage of a presumed railway suicide on the main railway trunk line following by 3 investigators killed by an express train. | • Daily railway suicidal behaviours increased by 44% following extensive media coverage of the presumed railway suicide incident in the index period, after controlling for unemployment rates and temperature. |
5 | Van Houwelingen, C. A. J., Kerkhof, A. J. F. M., & Beersma, D. G. M. (2010) [32] | Railway system, the Netherlands | Ecological study, measuring the associations between railway and population parameters and railway suicide rates. | 5178 railway suicides and 517 railway suicide attempts in 1980–2007 | Railway suicides and suicide attempts | • Railway length | Positive association: |
• Train mileage | • General suicides (similar trend) | ||||||
• Passenger kilometre | No association: | ||||||
• Railway length | |||||||
• Free transport for students | • Train mileage | ||||||
• Population density | • Passenger kilometre | ||||||
• General suicides | • Free transport for students | ||||||
• Presence of high risk populations near railways | • Population density | ||||||
6 | Baumert, J., Erazo, N., & Ladwig, K. H. (2006) [33] | Railway system, Germany | Ecological study, measuring the associations between availability of railway and train and railway suicide trend. | 8653 railway suicides and 857 railway suicide attempts in 1991-2000 | Railway suicides and suicide attempts | • Railway length | For subjects aged ≤ 65 years old, |
• Train mileage | Positive association: | ||||||
• Passenger kilometre | • Railway length (AAPC = 3.2) | ||||||
Negative association: | |||||||
• Passenger kilometre (AAPC = −2.7) | |||||||
No association: | |||||||
• Train mileage | |||||||
For subjects > 65 years old, | |||||||
Negative association: | |||||||
• Train mileage (AAPC = −8.8) | |||||||
• Passenger kilometre (AAPC = −10.4) | |||||||
No association: | |||||||
• Railway length | |||||||
7 | Clarke, M. (1994) [34] | Railway system, England and Wales, the United Kingdom | Ecological study, measuring the associations between availability of railway and train and railway suicide | 4171 railway suicides in 1852-1947 | Railway suicides | • Growth of railway length | Positive association: |
• Number of train passengers | • Growth of railway length | ||||||
• Number of train passengers | |||||||
8 | Schmidtke, A., & Häfner, H. (1988) [35] | Railway system, Germany | Quasi-experimental, ABABA design (A = baseline phase, B = broadcasting phase) | Years 1976–1984. First broadcasting in 1981, second broadcasting in 1982. | Railway suicides | Twice-broadcast six-episode weekly serial showing the railway suicide of a 19-year-old male student. | • Railway suicides increased by 175% in the period during and just after the two broadcasts, for the group whose age and sex were most similar to those of the film model. |
Intervention studies | |||||||
9 | Matsubayashi, T., Sawada, Y., & Ueda, M. (2012) [36] | 71 metro train stations, Japan | Quasi experimental, ecological study, comparing railway suicide number pre- and post-installation of blue light. | The average number of suicides per station-year observations was 0.164 in 2000-2010 | Railway suicides | Installation of blue light in 11 stations with blue light and 60 stations without blue light | • Railway suicides decreased by 84% after installation of blue lights, after controlling for the number of suicides in the previous years, use of faster train, proximity to a psychiatry hospital. |
10 | Law, C. K., et al. (2009) [37] | Underground system, Hong Kong | Quasi-experimental, ecological study measuring railway suicide before and after the installation of platform screen door. | 76 railway suicides in 1997-2007 | Underground railway suicides | Installation of platform screen door in 30 stations in year 2002 | • Railway suicides decreased by 59% since the installation of platform screen door, adjusted for age and gender. |
• No sign of suicide substitution to unsealed platforms. | |||||||
• Railway suicides of deceased with psychiatric profile decreased by 84%. | |||||||
11 | Niederkrotenthaler, T., & Sonneck, G. (2007) [38] | Subway system, Vienna, Austria | Quasi experimental, ecological study, measuring subway suicide before and after the introduction of media guidelines. | Year 1982/83 to 2004/5 | Subway suicides | Introduction of media guidelines in 1987/88. | • Subway suicides decreased by approximately 62 cases following the introduction of media guidelines, after controlling the passenger number. |