Gaps in Clinical Prevention and Treatment for Alcohol Use Disorders

Dr W's article, "Gaps in Clinical Prevention and Treatment for Alcohol Use Disorders" was published this month online in the journal Alcohol Research: Current Reviews. Here's the abstract:

Abstract

Heavy drinking causes significant morbidity, premature mortality, and other social and economic burdens on society, prompting numerous prevention and treatment efforts to avoid or ameliorate the prevalence of heavy drinking and its consequences. However, the impact on public health of current selective (i.e., clinical) prevention and treatment strategies is unclear. Screening and brief counseling for at-risk drinkers in ambulatory primary care has the strongest evidence for efficacy, and some evidence indicates this approach is cost-effective and reduces excess morbidity and dysfunction. Widespread implementation of screening and brief counseling of nondependent heavy drinkers outside of the medical context has the potential to have a large public health impact. For people with functional dependence, no appropriate treatment and prevention approaches currently exist, although such strategies might be able to prevent or reduce the morbidity and other harmful consequences associated with the condition before its eventual natural resolution. For people with alcohol use disorders, particularly severe and recurrent dependence, treatment studies have shown improvement in the short term. However, there is no compelling evidence that treatment of alcohol use disorders has resulted in reductions in overall disease burden. More research is needed on ways to address functional alcohol dependence as well as severe and recurrent alcohol dependence.

And check out the full piece here:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3908715/

Study: Healthcare Utilization Rates After Treatment Are Equivalent Among Abstinent and Low-Risk Drinkers

A fascinating new study will add to the small, but growing, treatment literature suggesting that low-risk drinking is a viable option for people receiving treatment for alcohol-use disorders. The paper, published this month in Alcoholism: Clinical and Experimental Research, measured healthcare utilization rates and associated costs over a 5-year period among clients receiving treatment in a large Northern California healthcare system. The results show that outcomes for abstainers and lower-risk drinkers were equivalent (and far better than the high-risk drinkers), despite the fact that the abstinence-based treatment received by all groups was the same.

According to the authors, "The finding that lower-risk drinkers did not differ from those of abstinent individuals, in inpatient use in particular, even when controlling for patient characteristics, suggests that a health policy perspective may consider benefits of lower-risk drinking."

Here's the abstract via Wiley:

Background

Lower-risk drinking is increasingly being examined as a treatment outcome for some patients following addiction treatment. However, few studies have examined the relationship between drinking status (lower-risk drinking in particular) and healthcare utilization and cost, which has important policy implications.

Methods

Participants were adults with alcohol dependence and/or abuse diagnoses who received outpatient alcohol and other drug treatment in a private, nonprofit integrated healthcare delivery system and had a follow-up interview 6 months after treatment entry (N = 995). Associations between past 30-day drinking status at 6 months (abstinence, lower-risk drinking defined as nonabstinence and no days of 5+ drinking, and heavy drinking defined as 1 or more days of 5+ drinking) and repeated measures of at least 1 emergency department (ED), inpatient or primary care visit, and their costs over 5 years were examined using mixed-effects models. We modeled an interaction between time and drinking status to examine trends in utilization and costs over time by drinking group.

Results

Heavy drinkers and lower-risk drinkers were not significantly different from the abstainers in their cost or utilization at time 0 (i.e., 6 months postintake). Heavy drinkers had increasing odds of inpatient (p < 0.01) and ED (p < 0.05) utilization over 5 years compared with abstainers. Lower-risk drinkers and abstainers did not significantly differ in their service use in any category over time. No differences were found in changes in primary care use among the 3 groups over time. The cost analyses paralleled the utilization results. Heavy drinkers had increasing ED (p < 0.05) and inpatient (p < 0.001) costs compared with the abstainers; primary care costs did not significantly differ. Lower-risk drinkers did not have significantly different medical costs compared with those who were abstinent over 5 years. However, post hoc analyses found lower-risk drinkers and heavy drinkers to not significantly differ in their ED use or costs over time.

Conclusions

Performance measures for treatment settings that consider treatment outcomes may need to take into account both abstinence and reduction to nonheavy drinking. Future research should examine whether results are replicated in harm reduction treatment, or whether such outcomes are found only in abstinence-based treatment.

Figure 1 shows Adjusted odds ratios of utilization by 6-month drinking group over time:

Figure 2 shows Adjusted average costs per member month by 6-month drinking group over time:

                                               






As mentioned above, these are the results from patients who attended abstinence-based treatment. It will be
interesting to see if these results are replicated among patients who are instructed on low-risk drinking. What experience do readers have with this issue? Do results like these make those directing abstinence-based programs think twice about the policy? It would be great to hear from you.

Hat tip: Thanks, Dr Reid Hester, for bringing this study to our attention.

Source: Kline‐Simon, A. H., Weisner, C. M., Parthasarathy, S., Falk, D. E., Litten, R. Z., & Mertens, J. R. (2013). Five‐Year Healthcare Utilization and Costs Among Lower‐Risk Drinkers Following Alcohol Treatment. Alcoholism: Clinical and Experimental Research.
http://onlinelibrary.wiley.com/doi/10.1111/acer.12273/abstract

SAMHSA Releases State and National Behavioral Health Barometer

The federal Substance Abuse and Mental Health Services Administration recently released its yearly report on the general state of behavioral health needs and services in the US. Based on population and treatment-facility data sets from state to state, the Behavioral Health Barometer is a sweeping, in-depth look into adolescent and adult drug use, treatment and mental health service utilization.

Among the highlights:
- Nationally, youth and young adult use of nonmedical pain relievers is declining in general.
- Past-month cigarette use among teens nationally and locally is declining, although Minnesota saw a small increase in 2011-2012
-Over 50% of Minnesota adolescents, and over 60% of adolescents nationally, did not receive treatment for their past-year depressive episode.
-In Minnesota, only 6.6% of people with past-year alcohol dependence received treatment. For illicit drugs, the number is 14.6%
-In Minnesota, while the number of people receiving methadone treatment has increased by nearly 1000 people since 2008, the number of people receiving buprenorphine has actually decreased in that time (owing to a sharp drop from 2008-2009.

The national report is here:
http://www.samhsa.gov/data/StatesInBrief/2K14/National_BHBarometer.pdf

Read the MN report here:
http://store.samhsa.gov/shin/content/SMA13-4796/SMA13-4796MN.pdf

And find your state here:
http://store.samhsa.gov/product/Behavioral-Health-Barometer-2013/SMA13-4796

New Report Sheds Light on Global Epidemiology of Stimulant-Use Disorders

A brand new study by researchers at the Australia National Health and Medical Research Council estimates the global burden of disease due to cocaine and amphetamine. Based on large systematic reviews of epidemiological data, disease models and global prevalence estimates, the authors present comorbidity-adjusted years of life lost to disability (YDL), years of life lost (YLL) and disability-adjusted life years (DALY) estimates. The authors note that their estimates include only the disease burdens attributable directly to amphetamine- and cocaine-use disorders, leaving out the likely considerable HIV- and HCV-attributable costs and burden.

via ScienceDirect:

Abstract

Aims

To estimate the global prevalence of cocaine and amphetamine dependence and the burden of disease attributable to these disorders.

Methods

An epidemiological model was developed using DisMod-MR, a Bayesian meta-regression tool, using epidemiological data (prevalence, incidence, remission and mortality) sourced from a multi-stage systematic review of data. Age, sex and region-specific prevalence was estimated for and multiplied by comorbidity-adjusted disability weightings to estimate years of life lost to disability (YLDs) from these disorders. Years of life lost (YLL) were estimated from cross-national vital registry data. Disability-adjusted life years DALYs) were estimated by summing YLDs and YLLs in 21 regions, by sex and age, in 1990 and 2010.

Results

In 2010, there were an estimated 24.1 million psychostimulant dependent people: 6.9 million cocaine and 17.2 million amphetamines, equating to a point prevalence of 0.10% (0.09-0.11%) for cocaine, and 0.25% (0.22-0.28%) for amphetamines. There were 37.6 amphetamine dependence DALYs (21.3-59.3) per 100,000 population in 2010 and 15.9 per 100,000 (9.3-25.0) cocaine dependence DALYs. There were clear differences between amphetamines and cocaine in the geographic distribution of crude DALYs. Over half of amphetamine dependence DALYs was in Asian regions (52%), whereas almost half of cocaine dependence DALYs was in the Americas (44%, with 23% in North America High Income).

Conclusion

Dependence upon psychostimulants is a substantial contributor to global disease burden; the contribution of cocaine and amphetamines to this burden varies dramatically by geographic region. There is a need to scale up evidence-based interventions to reduce this burden.

Figure 1 compares the DALYs of amphetamines and cocaine between genders:

Fig. 2 shows the distribution of "crude estimated DALYs" due to either substance:

And Fig. 3 shows "Country-level DALYs per 100,000 population due to amphetamine dependence, age-standardized, for persons in 2010":

Source:
http://www.sciencedirect.com/science/article/pii/S0376871614000234

Do Adverse Childhood Experiences Make Amphetamine More Pleasurable?

In a fascinating new study, researchers from the University of Maryland and Johns Hopkins University observed the way amphetamine affects the brain, comparing subjects who reported adverse childhood experiences (ACE) with those who did not. They found significant differences between groups in the way the drug impacted the dopamine (DA) neurotransmitter in the ventral striatal (VS) region of the brain, finding a significant positive correlation between early childhood trauma and VS DA release.

The results, published online in the journal, Psychopharmacology, suggest that adverse childhood experiences may enhance vulnerability to amphetamine-use disorders later in life by changing the way the brain transmits dopamine. Interestingly, a positive association between childhood trauma and amphetamine-induced pleasure was suggested for men, but vice versa for women.

Here's the abstract via SpringerLink, and an interesting image from the article:

Abstract

Rationale

Childhood exposure to severe or chronic trauma is an important risk factor for the later development of adult mental health problems, such as substance abuse. Even in nonclinical samples of healthy adults, persons with a history of significant childhood adversity seem to experience greater psychological distress than those without this history. Evidence from rodent studies suggests that early life stress may impair dopamine function in ways that increase risks for drug abuse. However, the degree to which these findings translate to other species remains unclear.

Objectives

This study was conducted to examine associations between childhood adversity and dopamine and subjective responses to amphetamine in humans.

Methods

Following intake assessment, 28 healthy male and female adults, aged 18–29 years, underwent two consecutive 90-min positron emission tomography studies with high specific activity [11C]raclopride. The first scan was preceded by intravenous saline; the second by amphetamine (AMPH 0.3 mg/kg).

Results

Consistent with prior literature, findings showed positive associations between childhood trauma and current levels of perceived stress. Moreover, greater number of traumatic events and higher levels of perceived stress were each associated with higher ventral striatal dopamine responses to AMPH. Findings of mediation analyses further showed that a portion of the relationship between childhood trauma and dopamine release may be mediated by perceived stress.

Conclusions

Overall, results are consistent with preclinical findings suggesting that early trauma may lead to enhanced sensitivity to psychostimulants and that this mechanism may underlie increased vulnerability for drug abuse.

http://link.springer.com/article/10.1007%2Fs00213-013-3407-z

Study: Burden of Disease Associated with Alcohol-use Disorders Higher Than Previously Thought

In a paper published online last week in the journal, Alcoholism: Clinical and Experimental Research, a group of international researchers have brought fresh eyes to a familiar data set: the NIAAA's NESARC. Whereas past studies have estimated the alcohol-attributable global burden of disease, or rates of alcohol-attributable deaths and years of life lost, no study has focused specifically on the burden of disease in the United States associated with alcohol-use disorders (AUD). This is important, the authors note, because alcohol-use disorders (including "abuse" and "dependence" from DSM or "the harmful use of alcohol" from ICD) "were identified as the largest disease category contributing to the alcohol-attributable global burden of disease for the year 2004, making up approximately one-third of this burden." By using US-specific data, including population and death statistics as well as Waves 1 and 2 of the NESARC, the authors were able to estimate the burden of disease from AUD in the US in 2005.


Results

"In the United States in 2005, 65,000 deaths, 1,152,000 years of life lost due to premature mortality (YLL), 2,443,000 years of life lost due to disability (YLD), and 3,595,000 disability-adjusted life years (DALYs) lost were associated with AUD. For individuals 18 years of age and older, AUD were associated with 3% of all deaths (5% for men and 1% for women), and 5% of all YLL (7% for men and 2% for women). The majority of the burden of disease associated with AUD stemmed from YLD, which accounted for 68% of DALYs associated with AUD (66% for men and 74% for women). The youngest age group had the largest proportion of DALYs associated with AUD stemming from YLD."

Some figures from the article:

Prevalence of alcohol use disorders by category, sex, and age in 2005. 

And:

Proportion of all deaths associated with alcohol use disorders in 2005, by sex and age


You can read the abstract of the paper by Rehm, et al. here:

http://onlinelibrary.wiley.com/doi/10.1111/acer.12331/abstract

Would love to hear readers reactions to these numbers. 

Study: Sex-Dependent Differences in Subjective Cannabis Effects (Do Women Enjoy Pot More Than Men?)

A new article by researchers at the New York State Psychiatric Institute and Department of Psychiatry at Columbia University explores the differences in the way men and women report their subjective experiences of the effects of cannabis. The authors reviewed data from four separate outpatient studies evaluating a range of cannabis-induced effects. In the final analysis, the subjects (35 men and 35 women) were all daily or near-daily cannabis users and their responses to standardized measures of mood, physical symptoms, and cannabis-related drug effects were recorded over time, beginning immediately after consumption.

It turns out, women were significantly more likely to report more feelings associated with enjoyment (and abuse liability) than men were:

According to the authors: "The results from this study demonstrate that when cannabis smokers are matched for use, ratings of cannabis’ subjective effects that are associated with abuse liability are higher in women compared to men. Although men and women significantly differed in body weight, sex differences were not observed for all subjective effects, including ratings of cannabis intoxication. "

In addition, cannabis use is more prevalent among men than women in the US (51.4% vs 37.4%, resp.). "Yet among cannabis smokers, women have a faster trajectory to cannabis-use disorders, which the current findings might in part explain." The authors call for more research to further explain the clinical significance of sex differences in the effects of cannabis and cannabis-use disorders.

The article by Cooper & Haney can be viewed here:

http://www.drugandalcoholdependence.com/article/S0376-8716%2813%2900529-2/abstract