Table 1

Characteristics of anxiety studies

Study	Symptom of mental health disorder	Physical health condition	Intervention	Interventionist	Type of study	Intervention location/practical accommodations for physical illness	Participant n (% female)	Age of participants M years (SD)	Time points for measures/follow-up	Global quality rating	Country
Blocher et al27	Anxiety	Epilepsy	Computerised CBT	Doctoral-level clinician, master’s-level clinician, and bachelor’s-level research specialist	Pre-post	Medical care setting	15 (53·3)	11 (1·51)	Preintervention, mid-intervention and postintervention 3-month follow-up	Moderate	USA
Hains et al29	Anxiety	Diabetes	CBT (stress-inoculation programme)	Doctoral students in counselling psychology	Multiple baseline	Hospital	6 (50)	12, 15, 13, 18, 13, 14	Baseline (1–5 weeks prior to intervention), before each session, 3-month follow-up	Moderate	USA
Hains et al28	Anxiety	Cystic Fibrosis	CBT (stress-inoculation programme)	PhD psychologist	Multiple baseline	Participants’ homes	5 (40)	13–15 years	Baseline (2–5 weeks prior to intervention), before each session, 3-month follow-up Parent-report preintervention, mid-intervention and at follow-up	Weak	USA
Papneja and Manassis30	Anxiety	Asthma	Group and individual CBT	Various, including psychology graduate student, psychiatrists, child youth worker, cognitive therapist and cognitive therapists in training	Matched case-control	Anxiety disorders clinic of a large urban children's hospital	36+36 (control) (gender not stated)	8–12 years	Preintervention and postintervention	Strong	Canada
Reigada et al31	Anxiety	Inflammatory bowel disease	CBT (for parent and child)	PhD-level clinical psychologist or advanced doctoral students	Pre-post	Sessions offered on same day as medical appointment/during infusions· Sessions over telephone also offered·	9 (44)	13·8 (2·2)	Preintervention and postintervention	Strong	USA

CBT, cognitive behavioural therapy.