Gibon 2011

Methods	RCT.
Participants	80 participants of 4 radiotherapy teams comprising secretaries (16%), physicists (7.5%), nurses (49%), doctors (27.5 %).
Interventions	38 hours of CST; not described in detail.
Outcomes	HCP communication skills rated using the scale LaComm* on audio of simulated breast cancer patient (SP) interview at baseline and post‐intervention (or equivalent timings for control group).
Notes	For some communication skill outcomes, course attendees (intervention group) had significantly more appropriate behaviours/skills than those who had not attended; these included a team orientated focus (P = 0.023), empathy (P = 0.037) and emotional words (P = 0.030).
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not described.
Allocation concealment (selection bias)	Unclear risk	Not described.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not described.
Incomplete outcome data (attrition bias) All outcomes	Low risk	83% follow‐up.
Selective reporting (reporting bias)	Unclear risk	No details of data extracted using LaComm*.
Other bias	High risk	Some differences in baseline characteristics of two groups including work experience in oncology, full‐time occupation, and % of non‐professionals.