Driving after alcohol consumption: A qualitative analysis among Chinese male drunk drivers

Neural Correlates of Metacognition Impairment in Opioid Addiction

BACKGROUND

Individuals with substance use disorder show impaired self-awareness of ongoing behavior. This deficit suggests problems with metacognition, which has been operationalized in the cognitive neuroscience literature as the ability to monitor and evaluate the success of one's own cognition and behavior. However, the neural mechanisms of metacognition have not been characterized in a population with drug addiction.

METHODS

Community samples of participants with opioid use disorder (OUD) (n = 27) and healthy control participants (n = 29) performed a previously validated functional magnetic resonance imaging metacognition task (perceptual decision-making task along with confidence ratings of performance). Measures of recent drug use and addiction severity were also acquired.

RESULTS

Individuals with OUD had lower metacognitive sensitivity (i.e., disconnection between task performance and task-related confidence) than control individuals. Trial-by-trial analyses showed that this overall group difference was driven by (suboptimally) low confidence in participants with OUD during correct trials. In functional magnetic resonance imaging analyses, the task engaged an expected network of brain regions (e.g., rostrolateral prefrontal cortex and dorsal anterior cingulate/supplementary motor area, both previously linked to metacognition); group differences emerged in a large ventral anterior cluster that included the medial and lateral orbitofrontal cortex and striatum (higher activation in OUD). Trial-by-trial functional magnetic resonance imaging analyses showed group differences in rostrolateral prefrontal cortex activation, which further correlated with metacognitive behavior across all participants. Exploratory analyses suggested that the behavioral and neural group differences were exacerbated by recent illicit opioid use and unexplained by general cognition.

CONCLUSIONS

With confirmation and extension of these findings, metacognition and its associated neural circuits could become new, promising therapeutic targets in addiction.

Predicting changes in driving performance in individuals who use cannabis following acute use based on self-reported readiness to drive

OBJECTIVE

It is unclear to what extent individuals who use cannabis can accurately assess their ability to drive safely following cannabis use, and lack of understanding as to what factors influence changes in driving performance following cannabis use. This research explores whether self-reported readiness to drive (RTD) and previous experience (PE) using cannabis within 2 h of driving can predict observed changes in driving performance following acute cannabis use.

METHODS

Individuals who used cannabis at least monthly completed a baseline simulated drive, were dosed with cannabis of approximately 6.18% THC, then drove at approximately 30-minutes, 90-minutes, and 180-minutes post-dose. Before each drive, participants were asked if they felt safe to drive (on real roadways, not the simulator), a yes/no question (RTD-yes/RTD-no). Venous blood was drawn at baseline and approximately 15-minutes post-dose. Cannabis use history was obtained and included whether the participant had ever driven within 2 h of use (PE-yes/PE-no) and how many days out of the past 30 they had done so (NPD). Drives were segmented into events delineated by changes in the driving environment. Within events, standard deviation of lateral position (SDLP), average speed, and number of lane departures were calculated, and differences from baseline were modeled using mixed-effects regression. Models considered covariates of time, event, and speed, and used RTD-yes/RTD-no, PE-yes/PE-no, NPD, and their interactions as potential predictors. Conditional R2 was used to compare the predictive ability of RTD versus change in Delta-9-THC.

DATA SOURCES

Data were collected from 30 individuals who use cannabis and included cannabis use patterns, driving behaviors after use, self-reported RTD, measures of driving performance, and cannabinoid blood levels.

RESULTS

RTD-no predicted a 2.60 cm increase in SDLP relative to baseline (95 % CI: 0.43, 4.73, p = 0.018). Average speeds generally decreased relative to baseline, except for RTD-yes with PE-yes (+1.08 mph, 95 % CI: 0.05, 2.11). NPD predicted increased speed among RTD-yes (+0.11 mph per additional day, 95 % CI: 0.01, 0.22) and decreased speed among RTD-no (-0.06 mph per additional day, 95 % CI: -0.18, 0.32). The difference in these effects was statistically significant (p = 0.038). RTD, PE, and NPD were not significant predictors of changes in number of lane departures. For all outcomes, models using RTD achieved higher conditional R2 than models that replaced this variable with change in Delta-9-THC. Differences were most prominent when modeling change in speed with NPD (R2=0.544 with RTD vs. R2=0.481 with change in Delta-9-THC).

SIGNIFICANCE OF RESULTS

These results suggest individuals who use cannabis can somewhat self-identify when they are likely to exhibit greater degraded lateral control, although RTD does not fully explain observed degradation in performance. Past research suggests drivers may reduce speed to compensate for recognized impairment following acute cannabis use. Our findings suggest this to be true for those who reported never having previously driven within 2 h of cannabis use or reported RTD-no, but not for those who had previously driven within 2 h of cannabis use and reported RTD-yes. This indicates compensatory behavior is not uniform and helps focus public health outreach efforts.

The relationship between lifestyle, driving anger and dangerous driving behaviours-An explorative study in a Chinese sample

Drivers who exhibit dangerous driving behaviours, such as aggressive, risky, and negative emotion cognition driving, are more likely to be involved in road crashes. A key motivator behind unsafe driving behaviours is driving anger. However, it is unclear whether lifestyle, driving anger, and dangerous driving behaviours are related. A total of 344 Chinese drivers with a formal driving license were asked to complete the socio-demographic information, the Chinese lifestyle questionnaire (Self-designed), the 14 items Driving Anger Scale (DAS), and the Dula Dangerous Driving Index (DDDI). The Chinese driver's lifestyles were analysed using Exploratory Factor Analysis (EFA), revealing a four-factor structure ("Culture", "Workaholism", "Sports" and "Amusement"). The 14 items DAS factor structure was determined using a Confirmatory Factor Analysis (CFA), yielding a two-factor structure ("Safety Concern anger" and "Arrival Concern anger"). Based on Hierarchical Multiple Regression (HMR), only "Workaholism" was associated with aggressive, risky, and negative emotion cognition driving. The trait driving anger was examined as a mediator between the "Workaholism" and dangerous driving (aggressive, risky, and negative emotion cognition driving) through a Structural Equation Modelling (SEM) approach. "Workaholism" was shown to influence these dangerous driving behaviours through trait driving anger. Lastly, this article discussed the theoretical and practical implications and research limitations.

Influence of alcohol provocation on medical professionals in Taiwan: A qualitative study

There is a paucity of research on the issue of alcohol provocation in the medical field. While studies have been performed concerning alcohol abuse among students, no studies have concentrated on alcohol provocation among medical professionals. Therefore, it is essential to look at the underlying factors that may influence alcohol use by medical professionals. A qualitative study using focus groups was conducted to construct themes depicting medical professionals' experiences of alcohol provocation. Physicians (n = 32) and residents (n = 29) were recruited from a large teaching hospital in Taiwan. The volunteers included both subjects and instigators of alcohol provocation (individuals being pressured to drink and those who exert such pressure on others). A questionnaire on their alcohol use was used to quantitatively assess the prevalence of alcohol consumption and inebriation. The participants were then interviewed separately in groups. All interview data were recorded, transcribed and analysed thematically. A notable prevalence of recent alcohol consumption was observed in both the physicians (n = 18, 56%) and residents (n = 17, 59%). Three prominent themes were identified and summarized: (1) Social drinking in the Taiwanese medical profession (2) Workplace hierarchy and changes in drinking culture, and (3) Influence on the medical profession. The behaviour of alcohol provocation among these medical professionals was revealed with its underlying factors of specific cultural norms, workplace hierarchy and social expectations. An understanding of alcohol provocation helps increase the awareness of adverse consequences associated with alcohol provocation, encourage medical professionals to avoid inappropriate drinking behaviors, and reduce the risk of compromising medical professionalism.