Bon Secours Mercy Health, Toledo, OH (Dr. Sewell); Radford University, VA (Dr. Cottrell); Alliant International UniversityCSPP, San Diego (Ms. Gutman); Baylor Scott & White Health, Temple, TX (Dr. Clemons); Kaiser Permanente, Redwood City, CA (Dr. Friedman); Deep Eddy Psychotherapy, Austin, TX (Dr. Kotin); Midwestern University, Glendale, AZ (Dr. Smith); UT Health Science Center at Tyler, TX (Dr. Whitehouse); Robert J. Dole VA Medical Center, Wichita, KS (Dr. Pratt) rebecca.sewell30@gmail.com
The authors reported no potential conflict of interest relevant to this article. Some of the material that appears here was originally published by the authors in the Winter 2019 issue ofTexas Psychologist.
The Insomnia Severity Index (ISI) assesses patients’ perceptions of their insomnia. The ISI was developed to aid both in the clinical evaluation of patients with insomnia and to measure treatment outcomes. Administration of the ISI takes approximately 5 minutes, and scoring takes less than 1 minute.
The ISI is composed of 7 items that measure the severity of sleep onset and sleep maintenance difficulties, satisfaction with current sleep, impact on daily functioning, impairment observable to others, and degree of distress caused by the sleep problems. Each item is scored on a 0 to 4 Likert-type scale, and the individual items are summed for a total score of 0 to 28, with higher scores suggesting more severe insomnia. Evidence-based guidelines recommend cognitive behavioral therapy for insomnia (CBT-I) as the first-line treatment for adults with primary insomnia.19
Several validation studies have found the ISI to be a reliable measure of perceived insomnia severity, and one that is sensitive to changes in patients’ perceptions of treatment outcomes.20,21 An additional validation study confirmed that in primary care settings, a cutoff score of 14 should be used to indicate the likely presence of clinical insomnia22 and to guide further assessment and intervention.
The percentage of insomniac patients correctly identified with the ISI was 82.2%, with moderate sensitivity (82.4%) and specificity (82.1%).22 A positive predictive value of 70% was found, meaning that an insomnia disorder is probable when the ISI total score is 14 or higher; conversely, the negative predictive value was 90.2%.
Substance use and pain
The evaluation of alcohol and drug use is an integral part of assessing risky health behaviors. The 10-item Alcohol Use Disorder Identification Test (AUDIT) is a self-report tool developed by the World Health Organization.23,24 Validated in medical settings, scores of 8 or higher suggest problematic drinking.25,26 The AUDIT has demonstrated high specificity (94%) and moderate sensitivity (81%) in primary care settings.27 The AUDIT-C (items 1, 2, and 3 of the AUDIT) has also demonstrated comparable sensitivity, although slightly lower specificity, than the full AUDIT, suggesting that this 3-question screen can also be used in primary care settings.27