Here are some studies on lavender and its effect on sleep quality:
Self-reported sleep problems: A randomized controlled trial
A study of 79 students (divided into 2 groups) with self-reported sleep problems compared the effectiveness of lavender ( Lavandula angustifolia ) and sleep hygiene versus sleep hygiene alone on sleep quantity and quality and determined the lasting effect at two weeks follow-up. Both groups practiced good sleep hygiene and wore an inhalation patch on their chest at night. One group wore a patch with 55 l of lavender essential oil and the other group wore a blank patch. Result: The lavender and sleep hygiene group demonstrated better sleep quality after the intervention and two weeks follow-up and as a bonus, a feeling of refreshment upon waking .
Self-Reported Sleep Issues: A Randomized Controlled Trial, Angela Smith Lillehei, Linda L Halcón, Kay Savik, Reilly Reis , PMCID: PMC4505755, DOI: 10.1089/acm.2014.0327 https://pubmed.ncbi.nlm.nih.gov/26133206/
The effects of preoperative aromatherapy massage on anxiety and sleep quality in patients after colorectal surgery: A randomized controlled study
Study objectives: To examine the effects of aromatherapy massage on anxiety and sleep quality in patients undergoing colorectal surgery during the preoperative period.
A randomized controlled trial, methods: Eighty patients undergoing colorectal surgery were randomly assigned to the experimental group and the control group. The experimental group (n = 40) was given aromatherapy massage according to the "Back Massage Guide" using 5% lavender oil ( Lavandula Hybrida ) for ten minutes before surgery and on the morning of surgery. The control group received standard nursing care, according to hospital procedure. Data were obtained by the State Anxiety Inventory (SAI) and the Richard-Campbell Sleep Questionnaire (RCSQ). The results were analyzed using the t-test, chi-square test, or Fisher's exact test. Results: There was no baseline difference between the groups. A statistically significant difference was found between the experimental and control groups in terms of mean SAI and RCSQ scores recorded on the morning of surgery. It was determined that the mean SAI and RCSQ score of the experimental group after aromatherapy massage on the morning of surgery decreased compared to that of the evening before surgery. Conclusion: Aromatherapy massage with lavender oil was found to increase sleep quality and reduce anxiety levels in patients who underwent colorectal surgery during the preoperative period.
Ayik C, Özden D. The effects of preoperative aromatherapy massage on anxiety and sleep quality of colorectal surgery patients: A randomized controlled study. Ther Med supplement. 2018 Feb; 36:93-99. doi: 10.1016/j.ctim.2017.12.002. PMID: 29458940.
Comparison of the effects of massage and aromatherapy massage with lavender oil on sleep quality in cardiac patients: A randomized controlled trial.
Sleep disturbances are a common problem among cardiac patients. This study aimed to investigate the effect of massage and aromatherapy massage on the sleep quality of cardiac patients. In this study, 150 subjects were randomly divided into 1) massage, 2) aromatherapy massage, and 3) control. In the massage group, subjects received a hand and foot massage with sweet almond oil. In the second group, the massage was performed on the same areas using a mixture of lavender and sweet almond oil . The data collection tool included the Pittsburgh Sleep Quality Index (PSQI). Before and after the intervention, the PSQI was completed by the subjects. Results: There was a significant difference between the mean PSQI scores before and after the intervention in the intervention and control groups, but this difference was not statistically significant between the two intervention groups. Conclusion: Massage and aromatherapy can improve sleep quality in cardiac patients.
Cheraghbeigi N, Modarresi M, Rezaei M, Khatony A. Comparing the effects of massage and aromatherapy massage with lavender oil on sleep quality of cardiac patients: A randomized controlled trial. Complement Ther Clin Pract. 2019 May; 35:253-258. doi: 10.1016/j.ctcp.2019.03.005. PMID: 31003666. https://www.sciencedirect.com/science/article/pii/S1744388118304055
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