according to a draft recommendation statement now available for public comment.
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The statement defines illicit drug use as “use of illegal drugs and the nonmedical use of prescription psychoactive medications (i.e., use for reasons, for duration, in amounts, or with frequency other than prescribed or use by persons other than the prescribed individual).”
The guidelines do not apply to individuals younger than 18 years, for whom the USPSTF found insufficient evidence to recommend routine screening, or to adults currently diagnosed or in treatment for a drug use disorder.
In the draft recommendation statement, available online, the USPSTF noted that several screening tools are available for use in primary care practices, including the BSTAD (Brief Screener for Tobacco, Alcohol, and Other Drugs) that consists of six questions. The task force noted that they have found “adequate evidence” that these screening tools can detect illicit drug use. In addition, they wrote that no studies offer evidence of benefits versus harms of these screening tools, and evidence of harms associated with screening are limited.
Screening intervals can be simplified by screening young adults whenever they seek medical services and when clinicians suspect illicit drug use, the USPSTF said.
When the draft recommendation is finalized, it will replace the 2008 recommendation, which found insufficient evidence for screening in adults, as well as in adolescents. New evidence since 2008 supports the value of screening for adults aged 18 years and older, including pregnant and postpartum women.
The draft recommendations are based on the results of two systematic evidence reviews that assessed the accuracy and harms of routine illicit drug use screening. The USPSTF’s review included 12 studies on the accuracy of 15 screening tools. Overall, the sensitivity of direct screening tools to identify “unhealthy use of ‘any drug’ (including illegal drugs and nonmedical use of prescription drugs) in the past month or year” ranged from 0.71 to 0.94, and the specificity ranged from 0.87 to 0.97.
Based on the current evidence, the USPSTF assigned drug screening for adults a grade B recommendation, defined as “high certainty that the net benefit is moderate or there is moderate certainty that the net benefit is moderate to substantial.”
For treatment, the Task Force found evidence to support strategies including pharmacotherapy with naltrexone, buprenorphine, and methadone, as well as for psychosocial interventions.
The USPSTF acknowledged that many factors may affect a clinicians’ decision of whether to implement the drug screening recommendation. “In many communities, affordable, accessible, and timely services for diagnostic assessment and treatment for patients with positive screening results are in limited supply or unaffordable. Providers should be aware of any state requirements for mandatory screening or reporting of screening results to medicolegal authorities and understand the positive and negative implications of reporting,” they wrote.
The draft recommendations also identified several research gaps including the effectiveness of screening for illicit drug use in adolescents, the optimal screening interval for all patients, the accuracy of screening tools for detecting opioids, the accuracy of screening within the same population, the benefits of naloxone as rescue therapy, and nonmedical use of other prescription drugs, as well as ways to improve access to care for those diagnosed with drug use disorders.
The draft recommendation is available for public comment until Sept. 9, 2019, at 8 p.m. EST.
The USPSTF is supported by the Agency for Healthcare Research and Quality. The researchers had no financial conflicts to disclose.