Faculty Bibliography

Significance: Limited data exist regarding tobacco and nicotine containing product (TNCP) use and their association with other drugs of abuse in high-risk settings. The purpose of this study was to examine the associations between TNCP use and other common illicit drug use among adults attending Electronic Dance Music (EDM) parties at nightclubs and festivals in New York City (NYC).
Method(s): Adults (age 18-40) were recruited outside of EDM events in NYC between May and August 2016 and completed a computer-assisted personal interview on a tablet. The survey took approximately 10 minutes and queried sociodemographic characteristics, and self-reported use of TNCPs (e-cigarettes, hookah, and "tobacco") and other drugs. Among recent (12-month) TNCP users, we compared illicit drug use according to the number of TNCPs reportedly used with the use of 1 TNCP representing mono-use, any 2 representing dual-use, and all 3 representing poly-use.
Result(s): More than half the overall sample (54%; N = 524 of 965) reported past year use of a TNCP. Participants' mean age was (25.1+4.5) years, and 55.2% were male. Almost half (46%) were mono users, 27% were dual TNCP users, and 27% were poly TNCP users. Sociodemographic characteristics were not associated with a number of TNCPs used; however, a number of products was significantly different regarding the past-year use of marijuana, powder cocaine, ecstasy (MDMA, "Molly"), LSD, and psilocybin ("magic mushrooms"). Poly users were more likely to report use of marijuana (94.4% vs 87.9% dual and 68.3% mono; P < 0.001), cocaine (69.2% vs 56.7% dual and 32.1% mono; P < 0.001), ecstasy (65.0% vs 61.0% dual and 49.6% mono; P = 0.007), LSD (46.9% vs 34.8% dual and 19.6% mono; P< 0.001), and psilocybin (44.8% vs 31.2% dual and 16.7% mono; P< 0.001).
Conclusion(s): Among this sample of EDM attendees in NYC, past-year use of TNCPs was strongly associated with the use of illicit drugs suggesting the use of more TNCPs is associated with risky behavior in high-risk settings. A limitation was that "tobacco" included all other TNCPs other than e-cigarettes and hookah. Adults' TNCP use patterns might be indicative of the extent of illicit drug use, especially among those frequenting high-risk settings. Future research needs to probe in the reasons behind the patterns of TNCP use among those in high-risk settings

BACKGROUND: Amphetamine is the most prevalent prescription stimulant in the United States, both medically and nonmedically. Reliable data on nonmedical use is needed to continue to inform prevention. To determine whether adolescents accurately self-report nonmedical amphetamine use, we compared self-reports of nonmedical amphetamine use and nonmedical Adderall use in a national sample. METHODS: We examined self-reported nonmedical Adderall and amphetamine use in a nationally representative sample of 24,740 high school seniors in the Monitoring the Future study (2010-2015). We examined prevalence and correlates of discordant responses among past-year Adderall users, defined as reporting past-year nonmedical Adderall use, but not reporting past-year nonmedical amphetamine use. RESULTS: While 6.9% reported nonmedical Adderall use and 7.9% reported nonmedical amphetamine use, over a quarter (28.7%) of Adderall users reported no amphetamine use. Those at highest risk for Adderall use tended to be at lower odds of providing a discordant response. Older students (aged >/=18), black students, and those with parents of lower educational attainment were more likely to report no amphetamine use, despite reporting Adderall use. Lifetime use of various drugs was associated with decreased odds of providing a discordant response; however, only nonmedical opioid use was associated with significant decreased odds in multivariable models. Disapproval towards amphetamine use increased odds of providing a discordant response, while higher exposure to users decreased odds of providing a discordant response. CONCLUSION: Prevalence of nonmedical amphetamine use may be underreported on some surveys, particularly among specific subpopulations. Future surveys must ensure accurate and consistent responses.

BACKGROUND: Ecstasy/MDMA has been one of the most prevalent party drugs for decades, and powder ecstasy recently increased in popularity. We examined trends in use to determine who to best target for prevention and harm reduction. METHODS: Secondary analysis of the 2007-2014 National Survey on Drug Use and Health, a repeated cross-sectional, nationally representative probability sample, was conducted. Linear trends in past-year ecstasy use and trends in demographic and other past-year substance use characteristics among ecstasy users were examined among participants ages 12-34 (N=332,560). RESULTS: Past-year prevalence of ecstasy use was stable across years at 2% (P=0.693). Over time, the proportion of ecstasy users with a college degree increased from 11.5% in 2007/08 to 24.5% in 2013/14 (P<0.001). The proportion of users who were age 12-17 decreased, as did proportions of users who are non-Hispanic black, and reported income <$20,000/year (Ps<0.001). Prevalence of past-year use of marijuana, LSD, ketamine, and DMT/AMT/Foxy increased among ecstasy users (Ps<0.05); DMT/AMT/Foxy use increased more than four-fold from 2.1% in 2007/08 to 8.7% in 2013/14. Perception of great risk associated with LSD use decreased among users and ease of obtaining LSD increased (Ps<0.05). Past-year use of 5 or more other substances also increased over time (P<0.05). CONCLUSIONS: Ecstasy use in the US appears to be increasing among those with college degrees and use of other substances among ecstasy users is growing-particularly use of otherwise rare substances such as tryptamines. Results inform prevention and harm reduction strategies in this increasingly shifting group of ecstasy users.

A decline in response rates in traditional household surveys, combined with increased internet coverage and decreased research budgets, has resulted in increased attractiveness of web survey research designs based on purposive and voluntary opt-in sampling strategies. In the study of hidden or stigmatised behaviours, such as cannabis use, web survey methods are increasingly common. However, opt-in web surveys are often heavily criticised due to their lack of sampling frame and unknown representativeness. In this article, we outline the current state of the debate about the relevance of pursuing representativeness, the state of probability sampling methods, and the utility of non-probability, web survey methods especially for accessing hidden or minority populations. Our article has two aims: (1) to present a comprehensive description of the methodology we use at Global Drug Survey (GDS), an annual cross-sectional web survey and (2) to compare the age and sex distributions of cannabis users who voluntarily completed (a) a household survey or (b) a large web-based purposive survey (GDS), across three countries: Australia, the United States, and Switzerland. We find that within each set of country comparisons, the demographic distributions among recent cannabis users are broadly similar, demonstrating that the age and sex distributions of those who volunteer to be surveyed are not vastly different between these non-probability and probability methods. We conclude that opt-in web surveys of hard-to-reach populations are an efficient way of gaining in-depth understanding of stigmatised behaviours and are appropriate, as long as they are not used to estimate drug use prevalence of the general population.