Enrolled participants who met inclusion criteria (full-time clinical nurses working for at least five days during a specified 10-day period) were randomized in 1:1 ratio to the coloring or control groups. A third party did the allocation sequence and concealment. After giving informed consent, participants completed the baseline questionnaire and the coloring group watched an instructional video on mindful coloring. The coloring group were asked to color for any length of time on at least five working days during a 10-day period (period A) while the control group were asked to do it on a subsequent 10-day (period B). The post-intervention questionnaire was completed by both groups at the end of period A. The study was completed after period B.
The purpose of this study was to investigate whether nurses who did mindful coloring for at least five working days during a 10-day period experienced stress reduction afterwards.