Kolcac 2020.

Methods	Parallel‐group randomised controlled trial
Participants	Inclusion criteria: undergone cardiac surgery; receiving mechanical ventilation; aged ≥ 18 years; –2 to +2 on RASS; agree to participate. Exclusion criteria: not understanding Turkish; vision and hearing loss; cognitive or psychological problem that prevents communication; prior intubation experience; bleeding, etc. in the early postoperative period; other complication such as undergoing revision surgery or needing additional sedation.
Interventions	Intervention Received illustrated communication material. Control No intervention.
Outcomes	Change of anxiety over time. Comfort level measured using the Early Postoperative Comfort Scale. Haemodynamic data are systolic and diastolic blood pressure, heart rate, respiration rate, and peripheral oxygen. Communication satisfaction and adequacy of communication technique. Change in pain over time.
Notes	Trial registered 3 March 2020; however, study completion date listed as 15 June 2017.