Depression is twice as common in women as in men, especially in the young age group. Multiple factors may contribute to this gender difference. Growing attention is being focused on the role of sex hormones, including those of hormonal contraception (HC). Some recent studies have indicated a higher risk of depression among women using HC, although the results are inconclusive.

The aim of this study is to examine the associations between the use of hormonal contraception and the risk of depression in childbearing age women.

The original cohorts for the study included all women aged 15-49 years with at least one redeemed prescriptions for HC in Finland in 2017 (n=294,356), and a 1:1 age-matched cohort of non-users. After exclusion of prevalent cases (n=35,102), all incident cases of depression (as recorded in the Care Register of Health Care and Register of Primary Health Care Visits) in 2018-2019 were identified (n=23,480), and a 4:1 age-matched control group (n=93,920) was selected from the above cohorts. Current use of HC in the 180 days before the event was compared in cases and controls, and associations with risk of depression were tested via conditional multivariate logistic regression models.

During the follow-up, 23,480 incident cases of depression were identified. Current use (in the 180 days before the event) of HC (OR 0.82, 95% CI 0.79-0.85), in particular of estradiol- or ethinylestradiol-containing combined HC was associated with a lower risk of depression (OR 0.83, 95% CI 0.76–0.89; OR 0.74, 95% CI 0.71–0.78, respectively) compared to non-use of HC. The results remained significant (OR 0.87, 95% CI 0.81-0.95; and OR 0.77, 95% CI 0.73-0.81, respectively) after controlling for covariates (marital and socioeconomic status, education level, chronic diseases). Use of progestin-only contraception was not associated with altered risk of depression.

Use of HC in childbearing age women is not associated with increased risk of depression. Rather, the use of estradiol- or ethinylestradiol-containing HC is associated with a lower risk of depression.

None Declared

In Finland more than 40% of fertile aged women used some type of hormonal contraception (HC) in the period 2010-2013. A proportion of women using HC complains of side effects, including mood symptoms. The relationship between the use of HC and the risk of attempted suicide (AS) is still a matter of debate.

To assess the association of the use of HC with the risk of AS during 2017-2019.

Data were retrieved from the Prescription Centre, Care Register of Health Care, Register of Primary Health Care Visits and Statistics Finland. A total of 587 823 women, aged 15-49 years, using and not using HC in 2017 were analysed in the initial incidence study. All incident AS cases during 2018-2019, and their 4:1 age-matched controls (1 174 346 person-years) were analysed in a nested case-control setting via conditional logistic regression models.

Altogether 818 AS cases occurred during the follow-up (incidence rate: 0.70/1000 person-years, 95% CI 0.65–0.75), with an IRR of HC vs. no-HC use of 0.73 (0.63–0.83). Current use (in the 180 days before the event) of estradiol- or ethinylestradiol-containing HC was associated with a lower risk of AS (0.53, 0.33–0.87; 0.49, 0.37–0.64, respectively) compared to non-use of HC. After controlling for covariates (marital and socioeconomic status, education level, use of psychotropic medications), only current use of HC containing ethinylestradiol remained significant (0.39, 0.23–0.65).

A lower risk of AS is associated with the use of HC, and specifically of ethinylestradiol-containing HC.

No significant relationships.

Intellectual disability (ID) is associated with violent and sexual offending and victimization, but the importance of neuropsychiatric comorbidity and severity of disability remains unclear.

In a register-based cohort study of people born in Sweden 1980–1991 (n = 1 232 564), we investigated associations of mild and moderate/severe ID with any, violent and sexual crimes, and with assault victimization, stratified by comorbid autism and attention deficit hyperactivity disorder (ADHD). We defined ID by attendance at a special school or registered diagnosis and obtained data on criminal convictions and injuries or deaths due to assaults from nationwide registers until end of 2013.

Compared to people without ID, autism or ADHD, men and women with mild or moderate/severe ID and comorbid ADHD had elevated risks of violent crimes [range of hazard ratios (HRs) 4.4–10.4] and assault victimization (HRs 2.0–7.7). Women with mild ID without comorbidities or with comorbid autism also had elevated risks of violent crimes and victimization (HRs 1.8–4.6) compared to women without ID, autism or ADHD. The relative risks of sexual offending and victimization were elevated in men and women with ID without comorbidities (HRs 2.6–12.7). The highest risks for sexual offending in men (HRs 9.4–11.0) and for sexual assault victimization in women (HRs 11.0–17.1) related to ID and comorbid ADHD.

The elevated risk of violent offending and assault victimization in people with ID is largely explained by comorbid ADHD, whereas ID is independently associated with sexual crimes and victimization, even though absolute risks are low.

Genetically informed studies have provided mixed findings as to what extent parental substance misuse is associated with offspring substance misuse and antisocial behavior due to shared environmental and genetic factors.

We linked data from nationwide registries for a cohort of 2 476 198 offspring born in Sweden 1958–1995 and their parents. Substance misuse was defined as International Classification of Diseases diagnoses of alcohol/drug use disorders or alcohol/drug-related criminal convictions. Quantitative genetic offspring-of-siblings analyses in offspring of monozygotic and dizygotic twin, full-sibling, and half-sibling parents were conducted.

Both maternal and paternal substance misuse were robustly associated with offspring substance misuse [maternal adjusted hazard ratio (aHR) = 1.83 (95% confidence interval (CI) 1.80–1.87); paternal aHR = 1.96 (1.94–1.98)] and criminal convictions [maternal aHR = 1.56 (1.54–1.58); paternal aHR = 1.66 (1.64–1.67)]. Additive genetic effects explained 42% (95% CI 25–56%) and 46% (36–55%) of the variance in maternal and paternal substance misuse, respectively, and between 36 and 44% of the variance in substance misuse and criminality in offspring. The associations between parental substance misuse and offspring outcomes were mostly due to additive genetic effects, which explained 54–85% of the parent-offspring covariance. However, both nuclear and extended family environmental factors also contributed to the associations, especially with offspring substance misuse.

Our findings from a large offspring-of-siblings study indicate that shared genetic influences mostly explain the associations between parental substance misuse and both offspring substance misuse and criminality, but we also found evidence for the contribution of environmental factors shared by members of nuclear and extended families.

Causes of the comorbidity of substance misuse with anxiety-related and depressive disorders (anxiety/depression) remain poorly known. We estimated associations of substance misuse and anxiety/depression in the general population and tested them while accounting for genetic and shared environmental factors.

We studied individuals born in Sweden 1968–1997 (n = 2 996 398) with follow-up in nationwide register data for 1997–2013. To account for familial effects, stratified analyses were conducted within siblings and twin pairs. Substance misuse was defined as ICD-10 alcohol or drug use disorder or an alcohol/drug-related criminal conviction. Three dimensions of ICD-10 anxiety and depressive disorders and a substance misuse dimension were identified through exploratory factor analysis.

Substance misuse was associated with a 4.5-fold (95% CI 4.50–4.58) elevated risk of lifetime generalized anxiety/depression, 4.7-fold (95% CI 4.63–4.82) elevated risk of panic disorder and agora/social phobia, and 2.9-fold elevated risk of phobias/OCD (95% CI 2.82–3.02) as compared to those without substance misuse. The associations were attenuated in within-family analyses but we found elevated risks in monozygotic twin pairs discordant for substance misuse as well as significant non-shared environmental correlations. The association between anxiety/depression and substance misuse was mainly driven by generalized anxiety/depression, whereas other anxiety/depression dimensions had minor or no independent associations with substance misuse.

Substance misuse and anxiety/depression are associated at the population level, and these associations are partially explained by familial liabilities. Our findings indicate a common genetic etiology but are also compatible with a potential partially causal relationship between substance misuse and anxiety/depression.

Epidemiological data on alcohol-induced psychotic disorder and delirium (alcohol-induced psychotic syndrome, AIPS) are scarce.

To investigate the epidemiology of AIPS, the risk factors for developing AIPS among people with alcohol dependence, and mortality associated with alcohol dependence with or without AIPS, in a sample drawn from the general population of Finland.

A general population sample of 8028 persons were interviewed with the Composite International Diagnostic Interview and screened for psychotic disorders using multiple sources. Best-estimate diagnoses of psychotic disorders were made using the Structured Clinical Interview for DSM–IV Axis I Disorders and case notes. Data on hospital treatments and deaths were collected from national registers.

The lifetime prevalence was 0.5% for AIPS and was highest (1.8%) among men of working age. Younger age at onset of alcohol dependence, low socioeconomic status, father's mental health or alcohol problems and multiple hospital treatments were associated with increased risk of AIPS. Participants with a history of AIPS had considerable medical comorbidity, and 37% of them died during the 8-year follow-up.

Alcohol-induced psychotic disorder is a severe mental disorder with poor outcome.

Cognitive deficits in alcohol dependence (AD) have been observed, poorer verbal ability being among the most consistent findings. Genetic factors influence both cognitive ability and AD, but whether these influences overlap is not known.

A subset of 602 monozygotic (MZ) and dizygotic (DZ) twins from FinnTwin16, a population-based study of Finnish twins, was used to study the associations of verbal ability with DSM-III-R diagnosis and symptoms of AD, the maximum number of drinks consumed in a 24-h period, and the Rutgers Alcohol Problem Index (RAPI) scores. These twins, most of them selected for within-pair discordance or concordance for their RAPI scores at age 18.5 years, were studied with neuropsychological tests and interviewed with the Semi-Structured Assessment for the Genetics of Alcoholism (SSAGA) in young adulthood (mean age 26.2 years, range 23–30 years).

All alcohol problem measures were associated with lower scores on the Vocabulary subtest of the Wechsler Adult Intelligence Scale – Revised (WAIS-R), a measure of verbal ability. In bivariate genetic models, Vocabulary and the alcohol problem measures had moderate heritabilities (0.54–0.72), and their covariation could be explained by correlated genetic influences (genetic correlations −0.20 to −0.31).

Poorer verbal ability and AD have partly overlapping biological etiology. The genetic and environmental influences on the development of cognitive abilities, alcohol problems and risk factors for AD should be studied further with prospective longitudinal designs.

The effect of mental disorders may be particularly detrimental in early adulthood, and information on mental disorders and their correlates in this age group is important.

A questionnaire focusing on mental health was sent to a nationally representative two-stage cluster sample of 1863 Finns aged 19 to 34 years. Based on a mental health screen, all screen-positives and a random sample of screen-negatives were asked to participate in a mental health assessment, consisting of the Structured Clinical Interview for DSM-IV (SCID-I) interview and neuropsychological assessment. We also obtained case-notes from all lifetime mental health treatments. This paper presents prevalences, sociodemographic associations and treatment contacts for current and lifetime mental disorders.

Forty percent of these young Finnish adults had at least one lifetime DSM-IV Axis I disorder, and 15% had a current disorder. The most common lifetime disorders were depressive disorders (17.7%) followed by substance abuse or dependence (14.2%) and anxiety disorders (12.6%). Of persons with any lifetime Axis I disorder, 59.2% had more than one disorder. Lower education and unemployment were strongly associated with current and lifetime disorders, particularly involving substance use. Although 58.3% of persons with a current Axis I disorder had received treatment at some point, only 24.2% had current treatment contact. However, 77.1% of persons with a current Axis I disorder who felt in need of treatment for mental health problems had current treatment contact.

Mental disorders in young adulthood are common and often co-morbid, and they may be particularly harmful for education and employment in this age group.