Psychiatric Symptom Characteristics in Methamphetamine-Induced Psychosis With and Without Lifetime Cannabis Use

Condition(s) studied

Study summary

This prospective cohort study aims to investigate factors associated with psychiatric symptom severity in participants diagnosed with methamphetamine-induced psychotic disorder (MP) with and without lifetime cannabis use (LCU). Participants hospitalized at Elazığ Mental Health and Diseases Hospital who meet Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR) criteria for MP will be included.

Participants will be divided into two groups based on the presence or absence of LCU. Psychiatric symptoms and clinical characteristics will be assessed weekly during an eight-week inpatient follow-up period using standardized psychometric instruments.

The study aims to determine whether LCU influences the course and severity of psychiatric symptoms in MP and to identify environmental, individual, and familial factors associated with symptom progression.

Eligibility

Primary outcome measure(s)

• Insight Assessment Scale (IAS) — It will be administered once a week for eight weeks.
  It was reported that insight cannot be evaluated as either present or absent, and it was defined it as a three-way process consisting of compliance with treatment, awareness of the illness, and accurate recognition of psychotic experiences. Based on these components, Insight Assessment Scale (IAS) was developed as a clinician-administered scale that quantitatively assesses insight for individuals with psychosis. IAS is an 8-question, clinician-administered, semi-structured scale. "Treatment acceptance"(1a), " treatmentrequest" (1b), "knowledge of illness" (2a), "knowledge of mental illness" (2b), "explanation of illness" (2c), "In addition to the 7 subscales titled "believing in the truth of the delusion" (3a), "explaining their experiences" (3b), there is a subscale titled "reaction to disbelief". The highest total score with this question is 18. A high score indicates a high level of insight. This scale was only administered to the methamphetamine-induced psychotic disorder group.
• Addiction Profile Index Clinical-Practitioner Form (API-C) — It will be administered once a week for eight weeks.
  API was developed to measure the factors related to addiction. It is a measure of 37 questions and 5 subscales. Subscales measure the substance use characteristics, dependency diagnostic criteria, the effect of substance use on the individual's life, the craving for substance use and the motivation to quit substance use. API-C includes the assessment of the six areas related to the addiction apart from areas where the API measures directly. Two of these six areas measure mental status, while others measure some personal characteristics of addiction. These areas are; depression, anxiety, anger control failure, lack of safe behavior, excitement seeking behavior and impulsiveness. In addition to the 37 questions in the API, there are 21 more questions in the API-C. Self-notification and enforcement forms are available. In our study, API-C Practitioner Form was used.
• Positive and Negative Syndrome Scale (PANSS) — It will be administered once a week for eight weeks.
  PANSS was developed to assess positive and negative symptoms and general psychopathology in patients with schizophrenia-spectrum disorder, and to measure the level of these symptoms. It is administered via a semi-structured interview, taking into account the last week. Information can also be obtained from the patient's relatives and healthcare staff. It consists of a total of 30 items: 7 items addressing positive symptoms, 7 addressing negative symptoms, and 16 addressing general psychopathology symptoms. Each item is scored from 1 to 7, and the scores are summed for the final score. This scale was only administered to the methamphetamine-induced psychotic disorder group.
• Global Assessment Scale (GAS) — It will be administered once a week for eight weeks.
  It is a rating scale that is administered quickly and covers all aspects of changes in psychopathology (psychological, social, and occupational functioning). Developed in 1976, it is scored from 0 to 100. A lower score is associated with a lower level of functioning.
• Pittsburgh Sleep Quality Index (PSQI) — It will be administered once a week for eight weeks.
  The PSQI, which assesses sleep quality over the past month, consists of 24 questions. Nineteen of these are self-report questions answered by the patient, while five questions are answered by a spouse or roommate and are used for clinical information only and are not included in the score. The last self-report question (question 19) concerns the presence of a roommate or spouse and is not used in the scoring. The total score ranges from 0 to 21. A total score higher than 5 indicates poor sleep quality.

Trial sites (2)

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