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Table 3 Subjective ratings of scents (mean ± SD)

From: Effect of aromatherapy with peppermint essential oil on the gag reflex: a randomized, placebo-controlled, single-blind, crossover study

 

Peppermint essential oil (mm)

Distilled water (mm)

P value*

Valence

67.3 ± 15.4

54.8 ± 9.3

0.004

Activation

37.3 ± 24.6

21.9 ± 17.1

0.01

Happiness

48.0 ± 26.1

34.9 ± 26.7

0.18

Disgust

16.1 ± 22.3

7.2 ± 13.6

0.03

Fear

5.5 ± 10.9

5.4 ± 11.3

0.88

Pleasure

61.7 ± 24.7

47.3 ± 27.0

0.04

  1. *Wilcoxon signed-rank test; VAS: visual analog scale; SD: standard deviation; VAS: 0–100 mm