Predictors of changes in marijuana consumption in Germany during the covid-19 pandemic.

During the Covid-19 pandemic Germany experienced its first increase in the proportion of heavy cannabis users since 1995. With the expected nationwide decriminalization of cannabis before 2025, we investigate the potential causes for that increase. Data were from the 2021 European Web Survey on Drugs (EWSD) including 762 12-month marijuana users from Germany (72.9% male, mean age = 29.5 years). Both heavy and regular cannabis consumers reported an increase in marijuana consumption during the pandemic, with infrequent users reporting a decrease. Using multinomial logistic regression, we found younger individuals (OR = 0.95 [95% CI = 0.92, 0.98]) and those not pursuing or completing higher education (OR = 1.86 [1.23, 2.81]) had increased use. Additionally, using cannabis to self-medicate (OR = 2.79 [1.56, 4.99]) and purchasing marijuana (OR = 2.26 [1.35, 3.77]) was associated with increased use. We found, relative to infrequent users, both regular (OR = 4.00 [2.39, 6.72]) and notably heavy users (OR = 31.17 [12.10, 80.32]) were more likely to use cannabis to self-medicate. Both regular (OR = 4.09 [2.47, 6.77]) and especially heavy users (OR = 13.53 [6.74, 27.16]) were also more likely to purchase marijuana. Heavy users were also more likely to be past 30-day tobacco users (OR = 5.92 [2.81, 12.45]). We identified the self-reported motivation of using cannabis to self-medicate as well as act of purchasing marijuana as having the strongest relation to being a heavy user and increasing marijuana use during the Covid-19 pandemic.

Corrigendum: Estimating the prevalence of alcohol-related disorders and treatment utilization in Bremen 2016/2017 through routine data linkage.

[This corrects the article DOI: 10.3389/fpsyt.2023.1002526.].

Clustering care pathways of people with alcohol dependence using a data linkage of routine data in Bremen, Germany.

BACKGROUND: Although many individuals with alcohol dependence (AD) are recognized in the German healthcare system, only a few utilize addiction-specific treatment services. Those who enter treatment are not well characterized regarding their prospective pathways through the highly fragmented German healthcare system. This paper aims to (1) identify typical care pathways of patients with AD and their adherence to treatment guidelines and (2) explore the characteristics of these patients using routine data from different healthcare sectors. METHODS: We linked routinely collected register data of individuals with a documented alcohol-related diagnosis in the federal state of Bremen, Germany, in 2016/2017 and their addiction-specific health care: two statutory health insurance funds (outpatient pharmacotherapy for relapse prevention and inpatient episodes due to AD with and without qualified withdrawal treatment (QWT)), the German Pension Insurance (rehabilitation treatment) and a group of communal hospitals (outpatient addiction care). Individual care pathways of five different daily states of utilized addiction-specific treatment following an index inpatient admission due to AD were analyzed using state sequence analysis and cluster analysis. The follow-up time was 307 days (10 months). Individuals of the clustered pathways were compared concerning current treatment recommendations (1: QWT followed by postacute treatment; 2: time between QWT and rehabilitation). Patients' characteristics not considered during the cluster analysis (sex, age, nationality, comorbidity, and outpatient addiction care) were then compared using a multinomial logistic regression. RESULTS: The analysis of 518 individual sequences resulted in the identification of four pathway clusters differing in their utilization of acute and postacute treatment. Most did not utilize subsequent addiction-specific treatment after their index inpatient episode (n = 276) or had several inpatient episodes or QWT without postacute treatment (n = 205). Two small clusters contained pathways either starting rehabilitation (n = 26) or pharmacotherapy after the index episode (n = 11). Overall, only 9.3% utilized postacute treatment as recommended. CONCLUSIONS: A concern besides the generally low utilization of addiction-specific treatment is the implementation of postacute treatments for individuals after QWT.

Trends and projection in the proportion of (heavy) cannabis use in Germany from 1995 to 2021.

AIMS: To measure the current trends of cannabis use in Germany, measure trends in the proportion of heavy cannabis users and estimate future cannabis use rates. DESIGN: Repeated waves of the Epidemiological Survey on Substance Abuse, a cross-sectional survey conducted between 1995 and 2021 with a two-stage participant selection strategy where respondents completed a survey on substance use delivered through the post, over the telephone or on-line. SETTING: Germany. PARTICIPANTS/CASES: German-speaking participants aged between 18 and 59 years living in Germany who self-reported on their cannabis use in the past 12 months (n = 78 678). With the application of a weighting scheme, the data are nationally representative. MEASUREMENTS: Questions on the frequency of cannabis use in the past 12 months and self-reported changes in frequency of use due to the COVID-19 pandemic. FINDINGS: The prevalence of past 12-month cannabis users increased from 4.4% [95% confidence interval (CI) = 3.7, 5.1] in 1995 to 10.0% (95% CI = 8.9, 11.3) in 2021. Modeling these trends revealed a significant increase that accelerated over the past decade. The proportion of heavy cannabis users [cannabis use (almost) daily or at least 200 times per year] among past-year users has remained steady from 1995 (11.4%, 95% CI = 7.7, 16.5) to 2018 (9.5%, 95% CI = 7.6, 11.9), but significantly increased to 15.7% (95% CI = 13.1, 18.8) in 2021 during the COVID-19 pandemic. Extrapolating from these models, the prevalence of 12-month cannabis users in 2024 is expected to range between 10.4 and 15.0%, while the proportion of heavy cannabis users is unclear. CONCLUSIONS: Trends from 1995 to 2021 suggest that the prevalence of past 12-month cannabis users in Germany will continue to increase, with expected rates between 10.4 and 15.0% for the German-speaking adult population, and that at least one in 10 cannabis users will continue to use cannabis heavily (almost daily or 200 + times in the past year).

Estimating the prevalence of alcohol-related disorders and treatment utilization in Bremen 2016/2017 through routine data linkage.

Background: In Germany, most individuals with alcohol dependence are recognized by the health care system and about 16% per year receive addiction-specific care. This paper aimed to analyze the prevalence and treatment utilization rate of people with alcohol dependence by type of addiction-specific care in the federal state of Bremen using routine and survey data. Methods: The number of individuals with alcohol dependence was estimated using data from the 2018 Epidemiological Survey of Substance Abuse (ESA). Furthermore, linked routine data of two statutory health insurances (SHIs), the German pension insurance (GPI), and the communal hospital group Gesundheit Nord - Bremen Hospital Group (GeNo), from 2016/2017, were analyzed. Based on SHI data, the administrative prevalence of various alcohol-related diagnoses according to the International Classification of Diseases (ICD-10), in various treatment settings, was extrapolated to the total population of Bremen. Based on all routine data sources, treatment and care services for individuals with alcohol dependence were also extrapolated to Bremen's total population. Care services included outpatient addiction care visits and addiction-specific treatments, [i.e., qualified withdrawal treatment (QWT), outpatient pharmacotherapy as relapse prevention, and rehabilitation treatment]. Results: Of the survey-estimated 15,792 individuals with alcohol dependence in Bremen, 72.4% (n = 11,427) had a diagnosis documented with an ICD-10 code for alcohol dependence (F10.2) or withdrawal state (F10.3-4). One in 10 individuals with alcohol dependence (n = 1,577) used one or more addiction-specific care services during the observation period. Specifically, 3.7% (n = 675) received outpatient addiction care, 3.9% (n = 736) initiated QWT, 0.8% (n = 133) received pharmacotherapy, and 2.6% (n = 405) underwent rehabilitation treatment. The share of seeking addiction-specific treatment after diagnosis was highest among younger and male patients. Conclusion: Although more than half of the individuals with alcohol dependence are documented in the health system, utilization rates of addiction-specific treatments are low. These low utilization rates suggest that there are existing barriers to transferring patients with alcohol dependence into addiction-specific care. Strengthening primary medical care provision in dealing with alcohol-related disorders and improving networking within the addiction support system appear to be particularly appropriate.

Changes in the Use of Tobacco, Alternative Tobacco Products, and Tobacco Alternatives in Germany.

BACKGROUND: Due to the increasing use of alternative tobacco products (waterpipes, heat-not-burn) and tobacco alternatives (e-cigarettes), we studied recent changes in the prevalence of conventional tobacco use and alternative products. METHODS: Data come from ten waves of the Epidemiological Survey of Substance Abuse (ESA) from 1995 to 2021, with representative samples collected via paperpencil questionnaires, telephone interviews, or online. We compared the prevalence of conventional tobacco use and alternative products by gender and age (18-24, 25-39, 40-59 years). RESULTS: In all age groups, the use of conventional tobacco products decreased. The prevalence of the exclusive use of one of the three alternative products differed statistically significantly between age groups and in 2021 was higher for ages 18-24 (females: 11.1%, males: 12.4%) compared to ages 25-39 (females: 2.9%; males: 4.9%) and ages 40-59 (females: 1.4%; males: 2.0%). The use of alternative products was mainly due to the exclusive use of waterpipes among individuals aged 18 to 24 and 25 to 39 and the exclusive use of e-cigarettes among individuals aged 40 to 59. CONCLUSION: The higher prevalence of alternative product use among young adults implies a turning point that needs to be considered in prevention. Because of the addictive potential of these products, young adults can be expected to maintain their use into middle and older adulthood. There is a need to monitor the use of alternative products, identify the risks associated with them, and develop effective prevention and cessation interventions for adults.

The Use of Psychoactive Substances in Germany.

BACKGROUND: Monitoring the use of psychoactive substances and substance-related problems in the population allows for the assessment of prevalence and associated health and social consequences. METHODS: The data are derived from the Epidemiological Survey of Substance Abuse (ESA) 2021 (n = 9046, 18-64 years). We estimated prevalence rates of the use of tobacco, alcohol, illegal drugs, and psychoactive medications, as well as the prevalence rates of their problematic use (indicating dependence) using screening instruments, and extrapolated the results to the resident population (N = 51 139 451). RESULTS: Alcohol was the most frequently used substance, with a 30-day prevalence of 70.5% (36.1 million people), followed by non-opioid analgesic drugs (47.4%; 24.2 million) and conventional tobacco products (22.7%; 11.6 million). E-cigarettes were used by 4.3% (2.2 million) and heat-not-burn products by 1.3% (665 000). Among illegal drugs (12-month prevalence), cannabis was the most frequently used (8.8%; 4.5 million), followed by cocaine/crack (1.6%; 818 000) and amphetamine (1.4%; 716 000). Rates of problematic use among the study participants were 17.6% for alcohol (9.0 million), 7.8% for tobacco (4.0 million), 5.7% for psychoactive medications (2.9 million), and 2.5% for cannabis (1.3 million). CONCLUSION: The consumption of psychoactive substances continues to be widespread in Germany. In view of the imminent legal changes, the high prevalence of cannabis use and its problematic use need to be taken into consideration.