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Table 2 Comparison of the mean rank of symptoms and intensity of complaints assessed by the Premenstrual Symptoms Screening Tool (PSST) in the Echium amoenum and placebo groups before and during the first and second cycle of intervention

From: Effectiveness of Echium amoenum on premenstrual syndrome: a randomized, double-blind, controlled trial

PSST components

Placebo group n = 32

Mean rank

Echium amoenum group n = 37

Mean rank

**P-value

Base line

1st cycle of intervention

2st cycle of intervention

*P-value

Base line

1st cycle of intervention

Second month

*P-value

Symptoms

 1-Anger/irritability

42.4

40.6

39.5

0.07

46.8

36.7

24.6

< 0.001

< 0.001

 2-Anxiety/tension

32.5

31.4

29.2

0.3

42.8

30.9

18.7

< 0.001

< 0.001

 3-Tearful

33.2

30.0

29.8

0.3

42.6

31.5

18.6

< 0.001

< 0.001

 4-Depressed mood

29.6

31.1

28.4

0.2

43.4

34.8

22.6

< 0.001

< 0.001

 5-Decreased interest in work activities

29.5

25.9

25.0

0.1

39.8

28.8

20.2

< 0.001

< 0.001

 6-Decreased interest in home activities

27.3

25.7

24.8

0.5

37.1

26.1

16.0

< 0.001

< 0.001

 7-Decreased interest in social activities

26.7

23.1

21.9

0.2

40.3

27.8

19.0

< 0.001

< 0.001

 8-Difficulty concentrating

36.4

34.3

32.8

0.1

34.7

30.4

22.3

< 0.001

0.03

 9-Fatigue/lack of energy

37.7

35.4

32.9

0.1

43.2

31.8

20.2

< 0.001

< 0.001

 10-Overeating/food cravings

20.4

18.8

18.6

0.6

27.3

24.4

16.9

< 0.001

0.005

 11-Insomnia

15.3

12.5

14.7

0.7

24.1

18.4

13.7

0.002

0.04

 12-Hypersomnia

31.1

29.1

26.9

0.1

35.4

21.4

17.9

< 0.001

< 0.001

 13-Feeling overwhelmed

31.2

30.1

27.6

0.2

40.0

26.9

18.3

< 0.001

< 0.001

 14-Physical symptoms

39.3

36.1

33.8

0.1

44.2

31.0

22.6

< 0.001

< 0.001

Interference with

        

< 0.001

 15-work efficiency or productivity

33.2

29.5

26.8

0.09

40.8

30.2

19.8

< 0.001

< 0.001

 16-relationships with coworkers

33.3

29.8

28.2

0.2

40.0

29.7

19.0

< 0.001

< 0.001

 17-relationships with family

34.9

31.8

31.0

0.1

36.0

27.7

22.1

< 0.001

0.02

 18-social life activities

28.8

25.1

26.1

0.2

37.2

29.6

25.4

< 0.001

0.02

 19-home responsibilities

25.2

23.7

23.2

0.3

35.9

24.4

20.8

< 0.001

0.003

 Total

31.0

29.4

28.3

0.09

35.3

24.2

16.1

< 0.001

< 0.001

  1. *Within group P-value using Friedman test
  2. **Between groups P-value using Mann-Withney test to compare the differences (baseline score-2nd follow up score) between two study groups
  3. P-value < 0.05 considered statistically significant