Fig. 3
From: Evaluating the effect of aromatherapy on a stress marker in healthy subjects
In some subjects from whom informed consent regarding participation in Test 2 could be obtained, blood was collected on the day of saliva collection to calculate changes in the blood NA level. As described for Test 1, the rate of change in the blood NA level from Week 1 until Week 6 was calculated, regarding the point before the start of aroma oil inhalation as Week 0 and the blood NA level at this point as a reference. * 1p = 0.03 (significant increase), **1p = 0.02 (significant decrease)