Effectiveness of a Pragmatic, Metabolic Care Clinic for Patients With Severe Mental Illness - The Meta Care Clinic

Inclusion Criteria: * Patients with schizophrenia spectrum disorders (International classification of diseases; ICD-10: DF2x) or bipolar disorder (ICD-10: DF30.x or DF31.x) * Medical treatment with antipsychotics * Age 18-45 years * Legally competent * Able to give informed consent and either: \- Body mass index (BMI) ≥30 kg/m2. Or * BMI ≥27 kg/m2 and at least one of the following: * Hypertension defined as treatment with ≥1 antihypertensive drug or out-of-office / 24-hour, non-invasive ambulatory blood pressure ≥140/90 mmHg within the previous 6 months * Dyslipidaemia defined as treatment with ≥1 lipid-lowering drug or elevated low-density lipoprotein (LDL) cholesterol (≥3.0 mmol/l), elevated triglycerides (≥1.7 mmol/l) or low high-density lipoprotein cholesterol (≥1.2 mmol/l in women and ≥1.0 mmol/l in men) within the previous 6 months * Sleep apnoea (ICD-10 DG473). * Prediabetes or diabetes defined as HbA1c ≥42 mmol/mol or impaired fasting glucose as defined by the International Diabetes Federation within the previous 6 months. Or \- a history of rapid weight gain during antipsychotic therapy defined as increases of either ≥5% body weight or ≥5 cm waist circumference since initiation of antipsychotic therapy. Exclusion Criteria: * Clinical or laboratory evidence of comorbid medical disease not compatible with participation as judged by the research team. * Unstable psychiatric disorder as judged by the research team. * Severe current drug or alcohol misuse as judged by the research team. * Acute suicidal risk.