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Table 4 Change in IBS symptom severity score (FAS)

From: Efficacy and safety of peppermint oil for the treatment in Japanese patients with irritable bowel syndrome: a prospective, open-label, and single-arm study

IBS symptom

Visit

Na

Change in IBS symptom severity score

95% CI of mean

Paired t-tests

Mean

SD

Minimum

Median

Maximum

Abdominal pain or abdominal discomfort

Week 2

67

-0.53

0.53

-1.9

-0.60

0.9

-0.66, -0.41

p < 0.001

Week 4

67

-0.57

0.70

-2.6

-0.60

1.4

-0.73, -0.40

p < 0.001

Abdominal distension

Week 2

62

-0.50

0.62

-2.3

-0.40

0.5

-0.65, -0.34

p < 0.001

Week 4

62

-0.55

0.79

-2.3

-0.50

1.3

-0.74, -0.35

p < 0.001

Borborygmi

Week 2

58

-0.17

0.47

-1.9

-0.10

0.7

-0.29, -0.05

p = 0.007

Week 4

58

-0.24

0.58

-1.9

-0.20

1.7

-0.39, -0.09

p = 0.002

Flatulence

Week 2

55

-0.27

0.57

-1.9

-0.10

0.9

-0.42, -0.12

p < 0.001

Week 4

55

-0.39

0.76

-2.4

-0.30

1.7

-0.60, -0.19

p < 0.001

Sensation of incomplete defecations

Week 2

65

-0.26

0.58

-2.3

-0.20

1.0

-0.39, -0.12

p < 0.001

Week 4

65

-0.39

0.60

-2.3

-0.30

0.6

-0.53, -0.24

p < 0.001

Defecation urgency

Week 2

58

-0.21

0.45

-1.7

-0.10

1.0

-0.32, -0.10

p < 0.001

Week 4

58

-0.27

0.53

-2.0

-0.10

1.0

-0.40, -0.13

p < 0.001

Straining at stool

Week 2

59

-0.24

0.57

-1.9

-0.30

1.0

-0.38, -0.09

p = 0.002

Week 4

59

-0.43

0.58

-2.3

-0.40

0.6

-0.57, -0.28

p < 0.001

Belching

Week 2

36

-0.03

0.49

-1.3

0.00

1.0

-0.19, 0.13

p = 0.737

Week 4

36

-0.19

0.59

-1.8

-0.05

1.4

-0.38, 0.01

p = 0.065

Nausea

Week 2

26

-0.12

0.50

-1.8

-0.05

0.9

-0.31, 0.08

p = 0.231

Week 4

26

-0.21

0.65

-2.4

-0.10

1.4

-0.47, 0.05

p = 0.109

Heartburn

Week 2

38

-0.13

0.55

-1.8

-0.10

1.1

-0.31, 0.05

p = 0.151

Week 4

38

-0.23

0.65

-2.3

-0.10

1.3

-0.44, -0.02

p = 0.033

  1. SD standard deviation
  2. aFor each symptom, subjects who reported that “the symptom did not develop” during the screening period or at the time of any investigation were excluded from the analysis set for calculation