Measure | Description | Timeline | |||
---|---|---|---|---|---|
 |  | Before baseline | T0 | T1 | T2 |
Primary outcome | |||||
BAI | Clinical severity of anxiety |  | • | • | • |
Secondary outcomes | |||||
MI (subscale ‘alone’) | Agoraphobic avoidance behaviour |  | • | • | • |
PAS (Items A1 and A2) | Number and severity of panic attacks |  | • | • | • |
PHQ-9 | Depressiveness |  | • | • | • |
PACIC (short form) | Patients’ perspectives on receipt of care |  | • | • | • |
EQ-5D | Health-related quality of life |  | • | • | • |
CSSRI (modified version) | Health service use and productivity losses |  | • | • | • |
Additional measures | |||||
Screening questionnaire: OASIS; PHQ (panic module) | Patient-reported severity of anxiety symptoms and presence of diagnostic criteria for panic disorder | • |  |  |  |
Diagnostic interview (ICD-10-based checklist) | GP-reported diagnosis of panic disorder and agoraphobia | • |  |  |  |
Comorbid physical and mental disorders | GP-reported ICD-10 diagnoses | • |  |  |  |
Sociodemographic characteristics | Patient-reported age, sex, level of education, and marital status |  | • |  |  |
Treatment adherence questionnaire (self-developed) | Patient-reported adherence to self-managed exposure exercises |  |  | • |  |
GPs’ usual care | GP-reported referrals to psychiatric or psychological treatments (past six months) |  |  | • | • |