The underwater soundscape of the North Sea.

As awareness on the impact of anthropogenic underwater noise on marine life grows, underwater noise measurement programs are needed to determine the current status of marine areas and monitor long-term trends. The Joint Monitoring Programme for Ambient Noise in the North Sea (JOMOPANS) collaborative project was funded by the EU Interreg to collect a unique dataset of underwater noise levels at 19 sites across the North Sea, spanning many different countries and covering the period from 2019 to 2020. The ambient noise from this dataset has been characterised and compared - setting a benchmark for future measurements in the North Sea area. By identifying clusters with similar sound characteristics in three broadband frequency bands (25-160 Hz, 0.2-1.6 kHz, and 2-10 kHz), geographical areas that are similarly affected by sound have been identified. The measured underwater sound levels show a persistent and spatially uniform correlation with wind speed at high frequencies (above 1 kHz) and a correlation with the distance from ships at mid and high frequencies (between 40 Hz and 4 kHz). Correlation with ocean current velocity at low frequencies (up to 200 Hz), which are susceptible to nonacoustic contamination by flow noise, was also evaluated. These correlations were evaluated and simplified linear scaling laws for wind and current speeds were derived. The presented dataset provides a baseline for underwater noise measurements in the North Sea and shows that spatial variability of the dominant sound sources must be considered to predict the impact of noise reduction measures.

Evaluation of kurtosis-corrected sound exposure level as a metric for predicting onset of hearing threshold shifts in harbor porpoises (Phocoena phocoena).

Application of a kurtosis correction to frequency-weighted sound exposure level (SEL) improved predictions of risk of hearing damage in humans and terrestrial mammals for sound exposures with different degrees of impulsiveness. To assess whether kurtosis corrections may lead to improved predictions for marine mammals, corrections were applied to temporary threshold shift (TTS) growth measurements for harbor porpoises (Phocoena phocoena) exposed to different sounds. Kurtosis-corrected frequency-weighted SEL predicted accurately the growth of low levels of TTS (TTS1-4 < 10 dB) for intermittent sounds with short (1-13 s) silence intervals but was not consistent with frequency-weighted SEL data for continuous sound exposures.

Multi-site validation of shipping noise maps using field measurements.

Underwater radiated noise from shipping is globally pervasive and can cause deleterious effects on marine life, ranging from behavioural responses to physiological effects. Acoustic modelling makes it possible to map this noise over large areas and long timescales, and to test mitigation scenarios such as ship speed reduction or spatial restrictions. However, such maps must be validated against measurements to ensure confidence in their predictions. This study carried out a multi-site validation of the monthly and annual shipping noise maps for 2019 produced as part of the Joint Monitoring of Ambient Noise in the North Sea (JOMOPANS) programme. Spectral, spatial, and temporal differences between predictions and measurements were analysed, with differences linked to uncertainty in model input data and additional sources of anthropogenic noise in the measurements. Validating shipping noise models in this way ensures they can be applied with confidence in future management decisions to address shipping noise pollution.

The Course of Cognitive Performance during Inpatient Treatment in Patients with Alcohol Use Disorder with No, Mild or Major Neurocognitive Disorders.

AIMS: In patients with a history of chronic alcohol abuse, neurocognitive disorders (NCD) are not uncommon. The current study aimed to explore the course of cognitive performance, as measured by the Montreal Cognitive Assessment (MoCA), and everyday cognitive functioning, as measured by the Patient Competency Rating Scale (PCRS), in a large group of patients with alcohol use disorder (AUD) admitted to the Center of Excellence for Korsakov and Alcohol-related Cognitive Impairments. METHODS: A multiple time-series design was used, in which the MoCA was administered at three time points of assessment, and the PCRS was completed by both the patient and a clinician at two time points, all during clinical treatment. RESULTS: A total of 524 patients were included, 71 of whom were diagnosed with AUD only, 284 with AUD and mild NCD (ARCI) and 169 with AUD, major NCD and fulfilling criteria for Korsakoff's syndrome (KS). CONCLUSIONS: Cognitive performance improved for all three groups during treatment, sustained abstinence and recovery from AUD. A low memory performance on the MoCA without improvement over time was predictive for KS, while improvement on this domain did not differentiate between AUD and ARCI. Changes in overall cognitive performance and orientation in patients with KS were positively related to changes in everyday cognitive functioning.

Tapering with Pharmaceutical GHB or Benzodiazepines for Detoxification in GHB-Dependent Patients: A Matched-Subject Observational Study of Treatment-as-Usual in Belgium and The Netherlands.

BACKGROUND: The gamma-hydroxybutyric acid (GHB) withdrawal syndrome often has a fulminant course, with a rapid onset and swift progression of severe complications. In clinical practice, two pharmacological regimens are commonly used to counteract withdrawal symptoms during GHB detoxification: tapering with benzodiazepines (BZDs) or tapering with pharmaceutical GHB. In Belgium, standard treatment is tapering with BZDs, while in the Netherlands, pharmaceutical GHB is the preferred treatment method. Though BZDs are cheaper and readily available, case studies suggest GHB tapering results in less severe withdrawal and fewer complications. OBJECTIVES: This study aimed to compare two treatments-as-usual in tapering methods on withdrawal, craving and adverse events during detoxification in GHB-dependent patients. METHODS: In this multicentre non-randomised indirect comparison of two treatments-as-usual, patients with GHB dependence received BZD tapering (Belgian sample: n = 42) or GHB tapering (Dutch sample: n = 42, matched historical sample). Withdrawal was assessed using the Subjective and Objective Withdrawal Scales, craving was assessed with a Visual Analogue Scale and adverse events were systematically recorded. Differences in withdrawal and craving were analysed using a linear mixed-model analysis, with 'days in admission' and 'detoxification method' as fixed factors. Differences in adverse events were analysed using a Chi-square analysis. RESULTS: Withdrawal decreased over time in both groups. Withdrawal severity was higher in patients receiving BZD tapering (subjective mean = 36.50, standard deviation = 21.08; objective mean = 8.05, standard deviation = 4.68) than in patients receiving pharmaceutical GHB tapering (subjective mean = 15.90; standard deviation = 13.83; objective mean = 3.72; standard deviation = 2.56). No differences in craving were found. Adverse events were more common in the BZD than the GHB group, especially delirium (20 vs 2.5%, respectively). CONCLUSIONS: These results support earlier work that BZD tapering might not always sufficiently dampen withdrawal in GHB-dependent patients. However, it needs to be taken into account that both treatments were assessed in separate countries. Based on the current findings, tapering with pharmaceutical GHB could be considered for patients with GHB dependence during detoxification, as it has potentially less severe withdrawal and fewer complications than BZD tapering.

[Demoralisation in alcohol-dependent patients with co-occurring psychiatric disorders]. / Demoralisatie bij patiënten met alcoholafhankelijkheid en comorbide psychiatrische stoornissen.

BACKGROUND: Demoralisation is a multidimensional concept, with helplessness and hopelessness as its key elements. Many patients, both in somatic and in mental health care, suffer from demoralisation. In the process of recovery, remoralisation constitutes a first step.
AIM: To investigate demoralisation in alcohol-dependent inpatients with co-occurring psychiatric disorders.
METHOD: Included in this study were 159 alcohol-dependent inpatients admitted to clinics for dual diagnosis. Demoralisation was assessed at treatment entry and again one month later.
RESULTS: A strong level of demoralisation was found, particularly in the co-occurrence of depression, anxiety and personality disorders. At treatment entry, 92% of patients was clinically demoralised and, one month later, this was 89%. In patients with co-occurring depression, mood and personality disorders, a significant decrease of demoralisation was found after one month, whereas in patients with developmental and psychotic disorders this was not the case. In 11% of patients there was clinically relevant improvement and in 7.5% there was clinically relevant deterioration; the latter mainly in patients with co-occurring developmental and psychotic disorders.
CONCLUSION: At start of treatment, these alcohol-dependent patients were strongly demoralised, especially in the co-occurrence of psychiatric disorders. Although there was a significant improvement in demoralisation after one month of treatment, patients remained strongly demoralised. In one in ten patients there was clinically relevant remoralisation. As a first step in the process of recovery, clinicians should pay more attention to remoralisation. Targeted interventions, aimed at this specific population, are necessary.

The generalizability of the structure of substance abuse and antisocial behavioral syndromes: A systematic review.

BACKGROUND: Although several authors have suggested that a single externalizing spectrum encompassing both antisocial behavioral syndromes and substance use disorder is to be preferred, this assumption has not been evaluated systematically throughout studies. PURPOSE: The objective was to establish the generalizability of transdiagnostic models of externalizing disorders across different types of disorders and populations, in regard to the strength of the evidence. METHOD: We conducted a systematic literature review using combinations of two sets of keywords: 1) "antisocial", "externalizing", "conduct disorder", "disruptive behavior disorder", "substance abuse", "substance-related disorder", "cannabis", "cocaine", "hallucinogen", "alcoholism", "opioid"; 2) "latent structure", "factor analysis", "multivariate analysis". RESULTS: Models supporting a superordinate factor appeared dominant in a limited set of different populations, on which the majority of the research sample was focused. CONCLUSIONS: Although the externalizing spectrum model is a promising angle for future research and treatment, extending research on this model in a higher diversity of populations is recommended to enhance the understanding and applicability of the externalizing spectrum model.

Co-morbid anxiety disorders predict early relapse after inpatient alcohol treatment.

INTRODUCTION: Alcohol dependence and anxiety disorders often co-occur. Yet, the effect of co-morbid anxiety disorders on the alcohol relapse-risk after treatment is under debate. This study investigated the effect of co-morbid anxiety disorders on relapse rates in alcohol dependence. We hypothesized that co-morbid anxiety disorders would be particularly predictive for early relapse, but not late relapse. SUBJECTS AND METHODS: In a prospective design, male alcohol dependent patients (n=189) were recruited from an inpatient detoxification clinic. Psychiatric diagnoses and personality traits were assessed using the Mini International Neuropsychiatric Interview for psychiatric disorders and the Temperament and Character Inventory. The addiction severity index was used to assess addiction severity and follow-up. RESULTS: One year after detoxification, 81 patients (53%) relapsed and nine patients (7%) were deceased, due to alcohol related causes. Co-morbid anxiety disorder, marital status, addiction severity, in particular legal problems, and harm avoidance predicted relapse. Anxiety disorders specifically predicted early relapse. CONCLUSION: Alcohol dependence is a severe mental disorder, with high relapse rates and high mortality. Alcohol dependent patients with co-morbid anxiety disorders are particularly prone to relapse during the first three months of treatment. These patients may therefore require additional medical and psychological attention.

[Detoxification of patients with GHB dependence]. / Detoxificatie van patiënten met GHB-afhankelijkheid.

BACKGROUND: A new detoxification method for GHB dependence was developed recently in the Netherlands. The method involves the use of pharmaceutical GHB. AIM: To describe the characteristics of GHB dependent inpatients, the course of the detoxification process and patients' progress in the three months following inpatient detoxification. METHOD: 229 GHB dependent patients were monitored during and after inpatient detoxification. Records were kept of the psychiatric symptoms, withdrawal symptoms and relapses. RESULTS: The average age of the patients was 29 years; 69% of the patients were male. They reported severe symptoms of co-occurring depression and anxiety. Detoxification was successful in 86% of the patients and, on a whole, the procedure ran smoothly, without complications. However, within three months following detoxification two-thirds of the patients had relapsed and were again taking GHB. CONCLUSION: Pharmaceutical GHB can be used as an alternative to the benzodiazepine method for detoxifying patients with GHB dependence. However, the high relapse rates following detoxification are of great concern.

Shared and unique genetic contributions to attention deficit/hyperactivity disorder and substance use disorders: a pilot study of six candidate genes.

The shared genetic basis of attention deficit/hyperactivity disorder (ADHD) and substance use disorders (SUDs) was explored by investigating the association of candidate risk factors in neurotransmitter genes with both disorders. One hundred seven methadone maintenance treatment patients, 36 having an ADHD diagnosis, 176 adult patients with ADHD without SUDs, and 500 healthy controls were genotyped for variants in the DRD4 (exon 3 VNTR), DRD5 (upstream VNTR), HTR1B (rs6296), DBH (rs2519152), COMT (rs4680; Val158Met), and OPRM1 (rs1799971; 118A>G) genes. Association with disease was tested using logistic regression models. This pilot study was adequately powered to detect larger genetic effects (OR≥2) of risk alleles with a low frequency. Compared to controls, ADHD patients (with and without SUDs) showed significantly increased frequency of the DBH (rs2519152: OR 1.73; CI 1.15-2.59; P=0.008) and the OPRM1 risk genotypes (rs1799971: OR 1.71; CI 1.17-2.50; P=0.006). The DBH risk genotype was associated with ADHD diagnosis, with the association strongest in the pure ADHD group. The OPRM1 risk genotype increased the risk for the combined ADHD and SUD phenotype. The present study strengthens the evidence for a shared genetic basis for ADHD and addiction. The association of OPRM1 with the ADHD and SUD combination could help to explain the contradictory results of previous studies. The power limitations of the study restrict the significance of these findings: replication in larger samples is warranted.

Influence of attention deficit hyperactivity disorder and conduct disorder on opioid dependence severity and psychiatric comorbidity in chronic methadone-maintained patients.

BACKGROUND: Persistent attention deficit hyperactivity disorder (ADHD) and a history of conduct disorder (CD) are highly prevalent among patients with substance use disorders (SUD). We examined the influence of both diagnoses on problem severity, psychiatric comorbidity, and quality of life in methadone-maintained patients. METHODS: 193 patients in long-term methadone maintenance treatment (MMT) were assessed for ADHD through a semi-structured interview. Psychiatric disorders and SUD were assessed with the MINI, the CIDI-SAM, and the SIDP-IV. RESULTS: Childhood ADHD was diagnosed in 68 (35.2%) patients; 48 (24.9%) had persisting ADHD; a CD history was present in 116 (60.1%). Patients with adult ADHD had significantly higher problem severity scores, lower quality of life scores, more comorbid SUD and more psychiatric comorbidity. Although both ADHD and CD contributed to problem severity, addictive pathology and psychopathology, ADHD was found to substantially increase the risk of psychiatric comorbidity, independent of CD. CONCLUSION: ADHD in MMT patients is characterised by greater addiction severity and more comorbid psychopathology, only partly explained by the influence of a coexisting CD. The presence of ADHD in a substantial minority of patients accentuates the need for early detection and treatment of this complicating disorder.

Treatment goals in addiction healthcare: the perspectives of patients and clinicians.

BACKGROUND: Little is known about the perspectives of either patients or clinicians regarding treatment goals in addiction healthcare. In general, treatment goals involve abstinence or at least reduction of substance use. AIM: To examine and compare the treatment goals indicated by both patients and clinicians at baseline, interim and exit measurement. METHOD: A descriptive study was performed with multiple measurements of treatment goals. Patients (n = 111) and clinicians (n = 20) were recruited from three addiction treatment centres in the Netherlands. A Shared Decision Making Intervention (SDMI) was undertaken to promote and evaluate treatment agreement. RESULTS: Patients identified treatment goals of daytime activities and abstinence or reduced alcohol consumption as most important. Clinicians indicated psychological distress, daytime activities and substance use as most important. Differences between patients and clinicians were found for the treatment goals of physical health (patient > clinician) and psychological distress (clinician > patient). The results further showed that treatment goals of both patients and clinicians become more closely aligned during the course of treatment. CONCLUSION: SDMI provides a method to explore and discuss discrepancy between patients' and clinicians' goals of treatment which leads to convergence. Such convergence is likely to be a necessary prerequisite for positive treatment outcomes.

Prevention and treatment of HIV addicted patients: a biopsychosocial approach.

Injecting drug use is the main route of HIV transmission in many parts of Indonesia. Efforts to prevent HIV-transmission through injecting drug use mostly focus on subjects who actively inject. In scientific publications, the term 'injecting drug users' tends to be used without a clear definition and without specifying the pattern of drug use as current or former drug use, frequency, duration, type of injected drug(s) or context (e.g. imprisonment). Actually, injecting drug users (IDUs) have different drug use patterns, risk behavior, somatic co-morbidity, psychiatric co-morbidity, and psychosocial problems. In fact, these patients are suffering from addiction as a chronic brain disease in co-occurrence with somatic and psychiatric disorder and many social problems. Failing in addressing the problems comprehensively will lead to the failure of drug treatment. This is why addiction can be best studied and treated from a biopsychosocial perspective. Accordingly, treatment goals can be differentiated in crisis intervention, cure or recovery (detoxification, relapse prevention), and care or partial remission (stabilization and harm reduction). In summary, injecting drug use in Indonesia is not a single entity and patient oriented prevention and care for IDUs, especially focusing on their addiction, should be addressed to prevent the transmission of HIV/AIDS.

Shared decision-making reduces drug use and psychiatric severity in substance-dependent patients.

BACKGROUND: In the last decades, shared decision-making (SDM) models have been developed to increase patient involvement in treatment decisions. The purpose of this study was to evaluate a SDM intervention (SDMI) for patients dependent on psychoactive substances in addiction health care programs. The intervention consisted of a structured procedure to reach a treatment agreement and comprised 5 sessions. METHODS: Clinicians in 3 treatment centres in the Netherlands were randomly assigned to the SDMI or a standard procedure to reach a treatment agreement. RESULTS: A total of 220 substance-dependent patients receiving inpatient treatment were randomised either to the intervention (n = 111) or control (n = 109) conditions. Reductions in primary substance use (F((1, 124)) = 248.38, p < 0.01) and addiction severity (F((8)) = 27.76, p < 0.01) were found in the total population. Significant change was found in the total population regarding patients' quality of life measured at baseline, exit and follow-up (F((2, 146)) = 5.66, p < 0.01). On the European Addiction Severity Index, SDMI showed significantly better improvements than standard decision-making regarding drug use (F((1, 164)) = 7.40, p < 0.01) and psychiatric problems (F((1, 164)) = 5.91, p = 0.02) at 3-month follow-up. CONCLUSION: SDMI showed a significant add-on effect on top of a well-established 3-month inpatient intervention. SDMI offers an effective, structured, frequent and well-balanced intervention to carry out and evaluate a treatment agreement.

Systematic review of the effects of shared decision-making on patient satisfaction, treatment adherence and health status.

BACKGROUND: In the last decade, the clinician-patient relationship has become more of a partnership. There is growing interest in shared decision-making (SDM) in which the clinician and patient go through all phases of the decision-making process together, share treatment preferences, and reach an agreement on treatment choice. The purpose of this review is to determine the extent, quality, and consistency of the evidence about the effectiveness of SDM. METHOD: This is a systematic review of randomised controlled trials (RCTs) comparing SDM interventions with non-SDM interventions. Eleven RCTs met the required criteria, and were included in this review. RESULTS: The methodological quality of the studies included in this review was high overall. Five RCTs showed no difference between SDM and control, one RCT showed no short-term effects but showed positive longer-term effects, and five RCTs reported a positive effect of SDM on outcome measures. The two studies included of people with mental healthcare problems reported a positive effect of SDM. CONCLUSIONS: Despite the considerable interest in applying SDM clinically, little research regarding its effectiveness has been done to date. It has been argued that SDM is particularly suitable for long-term decisions, especially in the context of a chronic illness, and when the intervention contains more than one session. Our results show that under such circumstances, SDM can be an effective method of reaching a treatment agreement. Evidence for the effectiveness of SDM in the context of other types of decisions, or in general, is still inconclusive. Future studies of SDM should probably focus on long-term decisions.

Acute neuropsychological effects of MDMA and ethanol (co-)administration in healthy volunteers.

RATIONALE: In Western societies, a considerable percentage of young people expose themselves to 3,4-methylenedioxymethamphetamine (MDMA or "ecstasy"). Commonly, ecstasy is used in combination with other substances, in particular alcohol (ethanol). MDMA induces both arousing as well as hallucinogenic effects, whereas ethanol is a general central nervous system depressant. OBJECTIVE: The aim of the present study is to assess the acute effects of single and co-administration of MDMA and ethanol on executive, memory, psychomotor, visuomotor, visuospatial and attention function, as well as on subjective experience. MATERIALS AND METHODS: We performed a four-way, double-blind, randomised, crossover, placebo-controlled study in 16 healthy volunteers (nine male, seven female) between the ages of 18-29. MDMA was given orally (100 mg) and blood alcohol concentration was maintained at 0.6 per thousand by an ethanol infusion regime. RESULTS: Co-administration of MDMA and ethanol was well tolerated and did not show greater impairment of performance compared to the single-drug conditions. Impaired memory function was consistently observed after all drug conditions, whereas impairment of psychomotor function and attention was less consistent across drug conditions. CONCLUSIONS: Co-administration of MDMA and ethanol did not exacerbate the effects of either drug alone. Although the impairment of performance by all drug conditions was relatively moderate, all induced significant impairment of cognitive function.

[Addicted patients: do not distribute street drugs: do treat with registered psychoactive medication]. / Verslaafde patiënten: geen drugs verstrekken, maar behandelen met beproefde psychoactieve medicamenten.

Addiction is a chronic brain disease with a destructive lifestyle. The distribution of street drugs should not be an option for medical doctors. They should be able to prescribe registered psychoactive substances as agonist treatment. To become registered as a drug, the normal procedure for registration should be followed; this includes conducting good scientific research into efficacy and effectiveness.

A Dutch day treatment program for anorexia and bulimia nervosa in comparison with internationally described programs.

A Dutch day treatment program for patients with anorexia and bulimia nervosa is described and compared to intensive day treatment programs for patients with eating disorders outlined in international literature. The 5-day program is described in terms of its general characteristics, intended outcome and specific treatment interventions. Along these parameters it is compared to the programs found in a systematic literature search of day hospitalization programs for eating disorders. Global inspection shows a lot of similarities between all the programs. Looking more closely, also many important differences exist (concerning, e.g. treatment duration, intensity of treatment, theoretical orientation, goals of treatment and weight gain regime). Because of the differences, it is hard to compare outcome data between centres. Besides, on many of these dimensions, the literature does not yet tell us unambiguously what is best for our patients. Therefore, it is necessary to keep the dialogue between treatment centres going.