Blood enzyme may signal psychosis risk in meth users

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

1. For Methamphetamine Use Disorder (MUD) Group: \*Inclusion Criteria: * Diagnosis of MUD according to DSM-5-TR * Medication-free for at least one month prior to admission * Age ≥ 18 years and \<65 years * Provided informed consent For Methamphetamine Use Disorder (MUD) Group: \*Exclusion Criteria: • Hypertension * Diabetes mellitus * Chronic kidney disease * Rheumatoid arthritis * Systemic lupus erythematosus * Cardiac illness * Severe neurological disorders * Immunological or systemic illness * Primary psychiatric disorders other than MUD * Alcohol use disorder 2. For Methamphetamine-Induced Psychotic Disorder (MP) Group: \*Inclusion Criteria: * Diagnosis of MP according to DSM-5-TR * Medication-free for at least one month prior to admission * Age ≥ 18 years and \<65 years * Provided informed consent For Methamphetamine-Induced Psychotic Disorder (MP) Group: \*Exclusion Criteria: * Hypertension * Diabetes mellitus * Chronic kidney disease * Rheumatoid arthritis * Systemic lupus erythematosus * Cardiac illness * Severe neurological disorders * Immunological or systemic illness * Primary psychiatric disorders other than MP * Alcohol use disorder 3. For Healthy Control Group: \*Inclusion Criteria: * No psychiatric diagnosis * No systemic or immunological illness * Medication-free for at least one month * Age ≥ 18 years and \< 65 years * Provided informed consent For Healthy Control Group: \*Exclusion Criteria: • Hypertension * Diabetes mellitus * Chronic kidney disease * Rheumatoid arthritis * Systemic lupus erythematosus * Cardiac illness * Severe neurological disorders * Immunological or systemic illness * Primary psychiatric disorders other than schizophrenia * Alcohol/drug/substance use