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Table 1 Summary of key measures in the youth electronic assessment

From: The CAMP study: feasibility and clinical correlates of standardized assessments of substance use in a youth psychiatric inpatient sample

General construct

Specific variables

Demographics

Age, gender, sex, race/ethnicity, immigrant status, subjective social status [4, 48]

Substance use variables

 Cannabis use

• Frequency of use [4, 58]

• Symptoms of cannabis use disorder (CUDIT-R) [59]

• Age of onset [4, 58]

• Percentage of typical THC/CBD, grams per use day, cost per week/month

• Coping motives scores [60]

• Proportion of time spent using with others [61]

• Co-use with alcohol and co-use with tobacco [4]

 Alcohol use

• Frequency of any use [4, 58]

• Frequency of heavy episodic drinking (HED; 5+ drinks in a sitting) [4]

• Symptoms of alcohol use disorder (AUDIT) [62]

• Coping motives scores [63]

• Proportion of time spent using with others [61]

 Smoking

• Frequency of smoking cigarettes/cigars [4, 58]

• Frequency of e-cigarette use and types of substances in e-cigarettes [4, 58]

 Prescription drug misuse

Frequency of [4, 58, 64]:

 • Prescription stimulants

 • Prescription opioids

 • Prescription sedatives

 Other drug use

Frequency of [4, 58, 64]:

 • Cocaine

 • Methamphetamine

 • Solvents

 • Hallucinogens

 • Street opioids

 • Steroids

Psychiatric clinical severity and complexity

 Severity of psychological distress

The Kessler 6 (K6) [65] provided a dimensional measure of non-specific psychological distress. Previously derived cut-offs of ≥ 13 which indicate serious mental illness were used

 Internalizing symptom severity

The OCHS Emotional Behavioral Scales (OCHS-EBS) [66] dimensional measure captured symptoms of internalizing disorders including:

 • Major depressive episode (MDE; of note, suicide item removed)

 • Generalized anxiety disorder (GAD)

 • Social phobia (SP)

 Externalizing symptom severity

The OCHS-EBS [66] dimensional measure captured symptoms of externalizing disorders including:

 • Oppositional defiant disorder (ODD)

 • Conduct disorder (CD)

 • Attention deficit hyperactivity disorder (ADHD)

 Youth derived clinical complexity

Clinical cut-offs for OCHS-EBS disorder scores based on prevalence estimates derived from a diagnostic structured interview in the original OCHS general population sample were used to generate categorical prevalence of disorders [34]. The number of cut-offs youth exceeded were summed to derive number of internalizing, externalizing, and total disorders as indicators of youth reported clinical complexity.

 Symptoms of psychosis

A pre-existing symptom scale adapted from the Diagnostic Interview Schedule [67] provided a dimensional measure of symptoms of psychosis