Wong 2005.

Methods	Randomised controlled study
Participants	Patients: 60 participants with COPD were recruited from an acute care hospital in Hong Kong.
Interventions	Intervention: This study aimed to determine whether a nurse‐led telephone follow‐up programme would increase patients’ self efficacy when it came to managing their COPD dyspnoea. A person with high self efficacy feels more confident about engaging in activities and makes more effort to overcome challenges. Two phone calls were made in the first four weeks after discharge from hospital as this is felt to be a particularly vulnerable time for patient re‐admission. Control: control patients had routine care with no additional telephone input from nurses.
Outcomes	1. Self efficacy was measured by the Chinese Self Efficacy Scale. 2. Number of visits to accident and emergency department. 3. Number of hospitalisations. 4. Unscheduled visits by physicians.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	"randomised using the Research Randomizer software which generated 30 sets of numbers."
Allocation concealment (selection bias)	Unclear risk	Insufficient information
Blinding (performance bias and detection bias) All outcomes	Low risk	"data were collected by a research assistant who was blind to the grouping"
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Four patients who refused to answer second questions had their results replaced by the group mean. This may not have been statistically appropriate.
Selective reporting (reporting bias)	Low risk	All outcome measures stipulated in methods reported in findings of
Other bias	Low risk	No evidence of other bias