BACKGROUND: Asthma is a common disabling condition, with known environmental and familial risk factors and with their assumed interactions. We wanted to carry out a family study on asthma to address gene-environment interactions at a population level.METHODS: We conducted a nation-wide study on familial risks for asthma. An asthma database was constructed by linking the Multigeneration Register on

OBJECTIVE: This study analyzed men and women separately by age at hospital diagnosis of psychotic disorder or schizophrenia and by maternal or paternal disease after taking several possible confounders into account.METHODS: The Multigeneration Register, in which all men and women born in Sweden from 1932 onwards are registered together with their parents, was linked to hospital data. This yielded

OBJECTIVES: The aim of this study is to investigate associations between hospitalization for epilepsy and two factors: socioeconomic status and occupation.DESIGN AND SETTING: A nationwide database was constructed in Sweden by linking the Swedish Census to the Hospital Discharge Register to obtain data on all first-time hospitalizations for epilepsy in adults in Sweden during the study period (1987

OBJECTIVES: The aim of this study was to investigate whether there is an association between socioeconomic status, occupation and obstructive sleep apnea.METHODS: A nationwide database was constructed by linking the Swedish Census to the Hospital Discharge Register and the Cause of Death Register to obtain data on all first adult hospitalizations for obstructive sleep apnea diagnosed in Sweden dur

Cerebral palsy is the commonest cause of severe childhood disability, the aetiology of which is largely unknown. Data on familial aggregation of cerebral palsy are very limited. We defined familial risks for siblings who were hospitalised because of cerebral palsy in Sweden. A nationwide database for neurological diseases was constructed by linking the Multigeneration Register to the Hospital Disc

The aim of this study was to estimate familial risks of Parkinson's disease (PD) in first-degree relatives of probands with PD compared with first-degree relatives of control probands. Standardized incidence ratios (SIRs) of PD were estimated in the total Swedish population for the period January 1, 1987 to December 31, 2001. SIRs were calculated by age, sex, occupation, geographic region, family

BACKGROUND: Nerve, nerve root and plexus disorders are common diseases, but little is known about familial clustering in these diseases. This is, to our knowledge, the first systematic family study carried out on these diseases.METHODS: Familial risks for siblings who were hospitalised for nerve, nerve root and plexus disorders in Sweden were defined. A nationwide database for neurological disease

AIMS: The main objective was to determine premature stroke risk in men and women in Sweden with previous hospital admission for Type 1 diabetes or without previous hospital admission.METHODS: All individuals in Sweden aged 15-34 years at first hospital admission for Type 1 diabetes and aged 15-49 years at first hospital admission for stroke during the study period (1987-2001) were identified. Stan

PURPOSE: Epilepsy is a common disabling condition, with high heritability according to twin studies. Characterization of familial risks for common subtypes of epilepsy will advance the search for the heritable causes of these conditions and their underlying mechanisms. We aim at defining familial risks for siblings to be hospitalized because of epilepsy.METHODS: A nationwide ad hoc epilepsy databa

Recent successes in identifying the underlying genetic mechanisms for neurological diseases, particularly for their Mendelian forms, have had profound implications for their diagnostics, treatment and classification. However, there has never been an attempt to compare familial risks in a systematic way among and between the main neurological diseases. Familial risks were here defined for siblings

BACKGROUND AND PURPOSE: Previous studies of familial risks have often combined ischemic and hemorrhagic stroke even though it seems unlikely that these 2 very different pathological conditions are under the same genetic influence. This study is the first to investigate the concordant (same subtype) and disconcordant (different subtype) association between ischemic and hemorrhagic stroke.METHODS: D

Diseases of the myoneural junction and muscle are disabling and some are life-threatening. Recent successes in the identification of the underlying genetic mechanisms have had profound implication for their diagnostics, treatment and classification. We define familial risks for siblings who were hospitalized for or deceased from diseases of the myoneural junction and muscle. A nationwide database

BACKGROUND: Few studies have investigated the possible differential transmission of maternal and/or paternal coronary heart disease (CHD) to offspring, after accounting for sociodemographic characteristics.METHODS: The Multigeneration Register was linked to hospital data in this study of all Swedish individuals born since 1932 and their parents. Registered cases of CHD between January 1, 1987, and

OBJECTIVE: To analyse whether hospitalization for affective or psychotic disorders predicts coronary heart disease (CHD) after accounting for occupation, region and alcohol-related disorders.METHOD: National registers were used to identify all individuals in Sweden aged 25-64 years at first hospitalization for affective or psychotic disorders and aged 25-79 years at first hospitalization for CHD b

OBJECTIVES: To analyse whether there is an association between country of birth in first-generation immigrants and first hospitalization for or death from coronary heart disease (CHD) and to analyse whether this association remains in second-generation immigrants.DESIGN: In this follow-up study, the MigMed database at the Karolinska Institute, Stockholm, was used to identify all hospital diagnoses

PURPOSE: Aortic aneurysms have a high fatality rate that could be reduced with control of risk factors and use of available screening methods for detection of early changes in aortic walls. The available data on familial risks, a potential indication for screening, are mainly limited to abdominal aortic aneurysms.METHODS: A nationwide Swedish cohort was constructed by linking the Multigeneration R

BACKGROUND: Studies have shown that patients with depression have higher rates of coronary heart disease (CHD) than people in the general population. However, large-scale population-based data on incidence rates of CHD in people with depression are needed. This study analyzed whether hospitalization for depression predicts CHD in men and women after accounting for socioeconomic status and geograph

Migraine and other headaches are common disabling conditions, reducing the quality of life in the affected individuals. The unambiguous definition of familial risk for subtypes of migraine and other headaches will advance the search for the heritable causes of these conditions and their underlying mechanisms. We aim at defining familial risks for siblings to be hospitalized because of migraine or