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Table 2 Respiratory parameters in the post- and pre-inhalers measurements for the study outcomes of the participants given M. spicata (n = 10) and C. sinensis oils (n = 10) when running equal distance of 1500 m before and after

From: The effect of inhalation of Citrus sinensis flowers and Mentha spicata leave essential oils on lung function and exercise performance: a quasi-experimental uncontrolled before-and-after study

Outcome variable

M. spicata oil group

C. sinensis oil group

Mean ± SDa

Mean difference ± SD

P-value*

Mean ± SDa

Mean difference ± SD

P-value*

FEV1

 - Post-inhaler

4.47 ± 0.23

  

4.66 ± 0.33

  

 - Pre-inhalers

3.72 ± 1.00

0.75 ± 1.16

0.074 ***

3.83 ± 1.39

0.83 ± 1.50

0.037 **

FVC

 - Post-inhaler

5.32 ± 0.31

  

5.57 ± 0.44

  

 - Pre-inhalers

4.41 ± 0.58

0.91 ± 0.75

0.007 **

3.99 ± 1.45

1.57 ± 1.59

0.005 **

FEV1/FVC

 - Post-inhaler

84.10 ± 0.31

  

84.10 ± 0.31

  

 - Pre-inhalers

85.00 ± 20.43

−0.90 ± 20.35

0.574

94.10 ± 8.58

−1.00 ± 8.56

0.021 **

  1. *P-value for the mean differences of the Two-related samples Wilcoxon test. ** Significance P-values (less than 0.05), *** A borderline significance
  2. aSD, standard deviation; FEV1, Forced Expiratory Volume in the first second; FVC, Forced Vital Capacity. FEV1/FVC, Ratio of FEV1 over FVC