Comparison between the effect of aromatherapy with lavender and damask rose on sleep quality in patients undergoing coronary artery bypass graft surgery: A randomized clinical trial

Numerous studies have investigated the effect of lavender and damask rose aromatherapy on sleep quality. There is, however, little research to compare the impact of them over each other. The aim of current study was to compare the effect of aromatherapy with lavender and damask rose on sleep quality in patients after coronary artery bypass graft (CABG) surgery in Guilan Province, Iran, in 2017-2018.

In this randomized clinical trial (RCT) study, 97 patients undergoing CABG were randomly assigned to intervention or control groups. In the intervention groups, the patients were asked by the researcher to inhale the lavender or damask rose randomly every night for 5 consecutive nights at 22:00. The control group received routine nursing care in compliance with the hospital procedure. Data were obtained by demographic-clinical and Beck Depression Inventory (BDI) questionnaires. To analyze the data, chi-square test, t-test, Kruskal-Wallis test, and Wilcoxon test were used.

During the 5-night intervention period, despite a relative improvement of sleep quality in intervention groups compared to the control group, none of the two aromatherapies had a statistically significant effect on any of delayed sleep (P = 0.514), sleep duration (P = 0.839), sleep efficiency (P = 0.067), sleep disturbances (P = 0.061), and daily functional disorders (P = 0.114) except for subjective sleep quality (P = 0.016) and use of sleep medications (P = 0.031).

Using both aromatherapies with lavender and damask rose indicated positive effects on sleep quality of the CABG patients, but we could not find a superiority over each other.