Jolly 2018.

Study characteristics
Methods	Design: RCT Follow‐up: 12 months Control group: usual care
Participants	Recruitment: general practice Assessed for eligibility: 1146 Randomly assigned: SM: 289; UC: 288 Completed: SM: 247; UC: 281 Mean age: SM: 70.7 (SD 8.8) years; UC: 70.2 (SD 7.8) years Gender (% male): SM: 63; UC: 64 COPD diagnosis: according to UK guidelines (FEV1/FVC ratio <0.7), confirmed by authors Inclusion of participants in acute phase: no Major inclusion criteria: on the practice COPD register, mild dyspnoea (MRC grades 1 (only breathless on strenuous exercise) or 2 (only get short of breath when hurrying on level ground or up a slight hill)), FEV1/FVC < 0.7 after post‐bronchodilator spirometry, aged 18 years or over Major exclusion criteria: level of dyspnoea of MRC grade 3 or greater, terminal disease or severe psychiatric disorder (confirmed by their GP)
Interventions	Mode: individually tailored written supportive materials (i.e. information leaflet, standard written information), followed by telephone calls Duration: 4 individual phone calls (first call 35 to 60 min, other calls 15 to 20 min) scheduled at 3, 7 and 11 weeks Professional: nurse Assignment of case managers: yes, accessible to participants during the complete follow‐up period Self‐management components: smoking cessation (optional), self‐recognition of COPD exacerbations (optional), use of a COPD exacerbation action plan (optional), physical activity, COPD medication intake (i.e. adherence, inhalation technique) Self‐management topics: coping with breathlessness Behavioural change techniques: 8 clusters: goals and planning, feedback and monitoring, social support, shaping knowledge, natural consequences, comparison of outcomes, regulation, antecedents
Outcomes	1. SGRQ‐C 2. MRC dyspnoea scale 3. Self‐reported physical activity 4. Psychological morbidity 5. Self‐efficacy (Stanford self‐efficacy scale) 6. Health state utility (EuroQoL 5 Dimensions 5 Levels)
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