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

Table 4 Comparison of rate of increase in gag reflex value for each intervention (mean ± SD)

Intervention	Increase rate of gag reflex values from baseline (%)	P value*
Placebo	3.3 ± 6.5^a
Aromatherapy	8.3 ± 7.6^b	0.003
Positive control	7.4 ± 8.0^b

* Repeated measures analysis of variance; SD: standard deviation
Lowercase letters correspond to differences among the three groups within the column using post-hoc comparisons (aromatherapy vs. positive control, P = 0.83; aromatherapy vs. placebo, P = 0.004; placebo vs. positive control, P = 0.02)

ISSN: 2662-7671