Jennifer McNeely1, Shiela M Strauss2, Richard Saitz3, Charles M Cleland2, Joseph J Palamar4, John Rotrosen5, Marc N Gourevitch6. 1. Department of Population Health, New York University (NYU) School of Medicine, New York; Department of Medicine, New York University (NYU) School of Medicine, New York. Electronic address: jennifer.mcneely@nyumc.org. 2. NYU College of Nursing, New York. 3. Department of Community Health Sciences, School of Public Health and Clinical Research and Education Unit, Section of General Internal Medicine, Boston Medical Center, Boston, Mass. 4. Department of Population Health, New York University (NYU) School of Medicine, New York. 5. Department of Psychiatry, NYU School of Medicine, New York. 6. Department of Population Health, New York University (NYU) School of Medicine, New York; Department of Medicine, New York University (NYU) School of Medicine, New York.
Abstract
BACKGROUND: Substance use screening is widely encouraged in health care settings, but the lack of a screening approach that fits easily into clinical workflows has restricted its broad implementation. The Substance Use Brief Screen (SUBS) was developed as a brief, self-administered instrument to identify unhealthy use of tobacco, alcohol, illicit drugs, and prescription drugs. We evaluated the validity and test-retest reliability of the SUBS in adult primary care patients. METHODS: Adults aged 18-65 years were enrolled from urban safety net primary care clinics to self-administer the SUBS using touch-screen tablet computers for a test-retest reliability study (n = 54) and a 2-site validation study (n = 586). In the test-retest reliability study, the SUBS was administered twice within a 2-week period. In the validation study, the SUBS was compared with reference standard measures, including self-reported measures and oral fluid drug tests. We measured test-retest reliability and diagnostic accuracy of the SUBS for detection of unhealthy use and substance use disorder for tobacco, alcohol, and drugs (illicit and prescription drug misuse). RESULTS: Test-retest reliability was good or excellent for each substance class. For detection of unhealthy use, the SUBS had sensitivity and specificity of 97.8% (95% confidence interval [CI], 93.7-99.5) and 95.7% (95% CI, 92.4-97.8), respectively, for tobacco; and 85.2% (95% CI, 79.3-89.9) and 77.0% (95% CI, 72.6-81.1) for alcohol. For unhealthy use of illicit or prescription drugs, sensitivity was 82.5% (95% CI, 75.7-88.0) and specificity 91.1% (95% CI, 87.9-93.6). With respect to identifying a substance use disorder, the SUBS had sensitivity and specificity of 100.0% (95% CI, 92.7-100.0) and 72.1% (95% CI, 67.1-76.8) for tobacco; 93.5% (95% CI, 85.5-97.9) and 64.6% (95% CI, 60.2-68.7) for alcohol; and 85.7% (95% CI, 77.2-92.0) and 82.0% (95% CI, 78.2-85.3) for drugs. Analyses of area under the receiver operating curve (AUC) indicated good discrimination (AUC 0.74-0.97) for all substance classes. Assistance in completing the SUBS was requested by 11% of participants. CONCLUSIONS: The SUBS was feasible for self-administration and generated valid results in a diverse primary care patient population. The 4-item SUBS can be recommended for primary care settings that are seeking to implement substance use screening.
BACKGROUND: Substance use screening is widely encouraged in health care settings, but the lack of a screening approach that fits easily into clinical workflows has restricted its broad implementation. The Substance Use Brief Screen (SUBS) was developed as a brief, self-administered instrument to identify unhealthy use of tobacco, alcohol, illicit drugs, and prescription drugs. We evaluated the validity and test-retest reliability of the SUBS in adult primary care patients. METHODS: Adults aged 18-65 years were enrolled from urban safety net primary care clinics to self-administer the SUBS using touch-screen tablet computers for a test-retest reliability study (n = 54) and a 2-site validation study (n = 586). In the test-retest reliability study, the SUBS was administered twice within a 2-week period. In the validation study, the SUBS was compared with reference standard measures, including self-reported measures and oral fluid drug tests. We measured test-retest reliability and diagnostic accuracy of the SUBS for detection of unhealthy use and substance use disorder for tobacco, alcohol, and drugs (illicit and prescription drug misuse). RESULTS: Test-retest reliability was good or excellent for each substance class. For detection of unhealthy use, the SUBS had sensitivity and specificity of 97.8% (95% confidence interval [CI], 93.7-99.5) and 95.7% (95% CI, 92.4-97.8), respectively, for tobacco; and 85.2% (95% CI, 79.3-89.9) and 77.0% (95% CI, 72.6-81.1) for alcohol. For unhealthy use of illicit or prescription drugs, sensitivity was 82.5% (95% CI, 75.7-88.0) and specificity 91.1% (95% CI, 87.9-93.6). With respect to identifying a substance use disorder, the SUBS had sensitivity and specificity of 100.0% (95% CI, 92.7-100.0) and 72.1% (95% CI, 67.1-76.8) for tobacco; 93.5% (95% CI, 85.5-97.9) and 64.6% (95% CI, 60.2-68.7) for alcohol; and 85.7% (95% CI, 77.2-92.0) and 82.0% (95% CI, 78.2-85.3) for drugs. Analyses of area under the receiver operating curve (AUC) indicated good discrimination (AUC 0.74-0.97) for all substance classes. Assistance in completing the SUBS was requested by 11% of participants. CONCLUSIONS: The SUBS was feasible for self-administration and generated valid results in a diverse primary care patient population. The 4-item SUBS can be recommended for primary care settings that are seeking to implement substance use screening.
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