22ZERO Studies 1-3 - 1,028 Clients


PTSD Threshold (PSSI5) 20-80 – PTSD Threshold (PCL5) 31-80

Anxiety threshold (GAD7) Mild Anxiety 5-9, Moderate Anxiety 10-14, and Severe Anxiety 15-21

Depression Threshold (PQH9) 5-27

22ZERO - Study Group 1

PTSD Symptom Scale Interview version 5


614 clients PTSD
Males: 259 Females: 355 Age Range: 11 – 103, 2 Children age 11 and 15
Pre Scores Average: 40.15 Post Score Average: 7.12 Average Number of Sessions: 1.27

22ZERO - Study Group 2

PTSD Checklist-version 5 (PCL5)


322 clients combined PTSD/Anxiety Study
Males: 188 Females: 134 Age Range: 6 – 75, 36 Children age 6-17
Pre Scores Average: 45.93 Post Score Average: 4.97 Average Number of Sessions: 1.24
General Anxiety Disorder version 7 (GAD7)
Pre Scores Average: 13.34 Post Score Average: 1.825 Average Number of Sessions: 1.24

22ZERO - Study Group 3

PTSD Checklist-version 5 (PCL5)


92 clients combined PTSD/Anxiety Study/Depression
Males: 188 Females: 134 Age Range: 6 – 75, 36 Children age 6-17
Pre Scores Average: 45.93 Post Score Average: 4.97 Average Number of Sessions: 1.24
General Anxiety Disorder version 7 (GAD7)
Pre Scores Average: 12.14 Post Score Average: 2.75 Average Number of Sessions: 1.27
Anxiety Threshold: Mild Anxiety 5-9, Moderate Anxiety 10-14, and Severe Anxiety 15-21
Pre Health Questionnaire version 9 (PQH9) – For Major Depressive Disorder (MDD)
Pre Scores Average: 12.14 Post Score Average: 2.75 Average Number of Sessions: 1.27
The PSSI-5 (Posttraumatic Stress Disorder Symptom Scale-Interview) is a structured interview for the assessment of symptoms of posttraumatic stress disorder (PTSD) according to the Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5). It is a clinician-administered measure that can be used to diagnose PTSD and evaluate treatment outcomes. Scores greater than 20 qualify for PTSD diagnosis.

The PCL-5 (Posttraumatic Stress Disorder Checklist for DSM-5) is a self-report measure for assessing symptoms of posttraumatic stress disorder (PTSD) according to the Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5).

It is a 20-item measure that assesses the presence and severity of symptoms associated with PTSD, including re-experiencing, avoidance, negative alterations in cognitions and mood, and alterations in arousal and reactivity.

Each item is rated on a 5-point scale (0 = Not at all to 4 = Extremely), with a total score range of 0-80. Scores greater than 31 qualify for PTSD diagnosis.


The PHQ-9 (Patient Health Questionnaire-9) is a self-report measure for assessing symptoms of major depressive disorder (MDD). It is a 9-item measure that assesses the presence and severity of symptoms associated with MDD, such as depressed mood, loss of interest, and difficulty concentrating. Each item is rated on a 4-point scale (0 = Not at all to 3 = Nearly every day), with a total score range of 0-27.

The GAD-7 (General Anxiety Disorder) Anxiety Severity Scoring

This is calculated by assigning scores of 0, 1, 2, and 3 to the response categories of “not at all,” “several days,” “more than half the days,” and “nearly every day,” respectively.

GAD-7 total score for the seven items ranges from 0 to 21. Scores 5, 10, and 15 represent cut points for mild, moderate, and severe anxiety, respectively.