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The fundamental problems related to uncertainty in quantitative risk analyses, used in decision making in safety-related issues (for instance, in land use planning and licensing procedures for hazardous establishments and activities) are presented and discussed, together with the different types of uncertainty that are introduced in the various stages of an analysis. A survey of methods for the pr
The present thesis concerns methods and knowledge that are useful when analysing the risks and vulnerabilities of complex systems in a societal emergency management context. Operational definitions of vulnerability and emergency response capabilities are suggested and two methods for analysing the vulnerability of critical infrastructure networks, based on the suggested definition, are presented.
An operational definition of vulnerability is proposed. The definition is used to describe and analyse different methods for risk and vulnerability analysis. Several problems related to analysing the vulnerability of a complex sociotechnical system to a specific perturbation are identified and discussed. Suggestions of how risk- and vulnerability analyses can be performed for such systems are pres
In this study, principles of Cognitive Systems Engineering are used to better understand the human–machine interaction manifesting in the use of anaesthesia alarms. The hypothesis is that the design of the machine incorporates built-in assumptions of the user that are discrepant with the anaesthesiologist's self-assessment, creating ‘user image mismatch’. Mismatch was interpreted by focusing on th
The familial risk of abdominal wall hernia (AWH) is largely unknown. In addition, it is unknown whether inguinal hernia (IH), femoral hernia (FH), incisional hernia (INH), epigastric hernia (EH), and umbilical hernia (UH) share familial susceptibility. The aim of this nationwide study was to determine the familial risks of concordant AWH (same disease in proband and exposed relative) and discordan
Background Using three independent methods, prior studies in Swedish sibling pairs indicate that environmental factors contribute substantially to familial aggregation for drug abuse (DA). Could we replicate these results in cousin pairs? Method Using multiple Swedish public databases (1964-2011), we defined DA using medical, legal or pharmacy registry records and examined concordance in full cous
Perinatal risk factors including high birth weight have been associated with Wilms tumor in case-control studies. However, these findings have seldom been examined in large cohort studies, and the specific contributions of gestational age at birth and fetal growth remain unknown. We conducted the largest population-based cohort study to date consisting of 3,571,574 persons born in Sweden in 1973-2
None of the population-based epidemiologic studies to date has had a large enough sample size to show the familial risk of testicular cancer (TC) by age at diagnosis for patients and their relatives or for rare histologic subtypes.
Background. Drug abuse (DA) is a clinically heterogeneous syndrome. Using medical, legal, death and pharmacy records covering the entire population of Sweden, could we uncover meaningful subtypes of DA? Method. We performed a latent class analysis (LCA) on all individuals in Sweden born 1950-1993 who were registered with DA or its consequences (n=192 501) and then validated these classes using dem
While drug abuse (DA) is strongly familial, we still have limited knowledge about the causes of its cross-generational transmission.
The development of physiologic monitors has contributed to the decline in morbidity and mortality in patients undergoing anaesthesia. Diverse factors (physiologic, technical, historical and medico-legal) create challenges for monitor alarm designers. Indeed, a growing body of literature suggests that alarms function sub-optimally in supporting the human operator. Despite existing technology that c
Abstract Objective. Few large-scale studies have examined the prevalence of irritable bowel syndrome (IBS) and the number of visits among IBS patients in a primary health care setting. The aim of this study was to assess the prevalence of IBS in primary health care in four Swedish counties. Another aim was to study the number of visits among the IBS patients. Design. A register-based study. Settin
Published studies have shown that familial risks in the primary central nervous system (CNS) tumors are usually histology-specific. If genetic factors indeed determine tumor histology it would be expected that histological types would agree between affected first-degree relatives (FDRs).
AIMS: Several cardiovascular disorders (CVDs) are strongly associated with socioeconomic disparities and neighbourhood deprivation. However, no study has determined whether neighbourhood deprivation is associated with atrial fibrillation (AF). We aimed to determine whether there is an association between neighbourhood deprivation and hospitalization for AF.METHODS AND RESULTS: The entire Swedish p
The majority of ovarian tumors in girls and young women are nonepithelial in origin. The etiology of nonepithelial ovarian tumors remains largely unknown, and intrauterine exposures may play an important role. We examined the association of perinatal factors with risk of nonepithelial ovarian tumors in girls and young women.
Alcohol use disorder (AUD) runs strongly in families. It is unclear to what extent the cross-generational transmission of AUD results from genetic vs environmental factors.
Twin studies have shown that criminal behavior (CB) is influenced by both genetic and shared environmental factors. Could these results be replicated using full-siblings and half-siblings?
IBS aggregates in families, but the familial risk of IBS has only been determined in first-degree relatives and spouses. This nationwide study aimed to determine the familial risk of IBS in first-degree, second-degree, and third-degree relatives and spouses of affected individuals in order to estimate the relative influences of genes and shared family environment.
