Int. J. Environ. Res. Public Health 2012, 9 774 collaboration with STA with a special focus on networks under their own governance. Incidents on these systems are therefore not included. 2.1. Setting 2.2. Data Sources Greater Stockholm rail district is divided into five geographical sections; North (N), South-East (SE), South-West (SW), West (W), and Central (C). The sections differ slightly in terms of number and length of tracks, train categories, and intensity. The north section and parts of the central section are operated by frequent express trains to and from the region’s main international airport, as well as commuter and long-distance trains. Data from two sources have been used for this study, both administered by STA: Synergi is an incident reporting system in operation since 2005. Records on train-person collisions include free-text descriptions on the event, information on when and where the collision took place, rail-related companies involved, the consequences, causes and immediate measures taken, as well as a classification of the type of event based on police reports. Data on sex, age and outcome (deceased or injured) are also included. More comprehensive investigation reports compiled by STA investigators with references to police observations on the same incidents are attached in most cases. STRIX is a mobile track status monitoring system which includes video recording, allowing visual observation of tracks, aerial lines and the nearest surroundings, without physical presence on site. 2.3. Data Analysis Quantitative data were extracted from the sources above by the main author, based on coded and free-text information, according to a variable structure developed in earlier studies [1–3]. Variables of interest include background victim data (age, sex), type of train, place characteristics (location, type of place, surroundings, barrier status), and crash details (the victim’s pre-crash behavior, injury mechanism, intent as defined by the police, time of occurrence). Rudimentary descriptive analyses were performed with the SPSS Statistics 19 program package. 3. Results 3.1. Intent, Age and Sex A total of 47 cases of train-person collisions were recorded during the period, of which 41 were fatal. These are further presented in this study. The cause of collision among these was in 30 cases classified as suicide by the police, and in the remaining 11 cases as accidents. Twenty-nine of the victims were male and 12 female. The age span was between 15 and 91 years, with most victims in the ages 40–59 for both suicide and all cases (Table 1). Mean and median ages for suicide were 40 and 42, respectively, while for accidents the corresponding ages were 37 and 24 years.