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Table 3 The comparison of participants' Short form of the World Health Organization Quality of Life Questionnaire (WHOQOL- BREF) scores (n=65)

From: The effect of hydrogen-rich water consumption on premenstrual symptoms and quality of life: a randomized controlled trial

Physical Health

Intervention Group

Control Group

   
 

Mean±SD

Mean±SD

Test value/P-value

Cohen's d

95% Cl

Baseline (a)

24.06±2.98

22.91±3.50

t=1.435 P=0.156

0.356

-0.454 to 2.762

First follow-up (b)

25.48±3.15

23.28±4.30

t=2.362 P=0.021*

0.586

0.339 to 4.068

Second follow-up (c)

25.18±4.74

23.44±3.70

t=1.651 P=0.104

0.410

-0.367 to 3.856

Time

F=2.02 P=0.143

Group

F=5.28 P=0.025

Group × time

F=0.56 P=0.554

Mauchly's test of sphericity: Mauchly's W; 0.879, Approx. Chi-Square; 8.009, p;0.018. The Greenhouse-Geisser test was utilized due to the assumption that sphericity was unmet.

Psychological Domain

 

Mean±SD (Median, Min-Max)

Mean±SD (Median, Min-Max)

Test value/P- value

  

Baseline (a)

19.12±3.16 (19.5, 13-25)

18.13±3.18 (18.0, 11-24)

t=1.267 P=0.210

0.314

-0.575 to 2.568

First follow-up (b)

19.73±2.27 (18.5, 13-24)

17.88±2.64 (18.5, 13-22)

t=3.040 P=0.003*

0.754

0.635 to 3.070

Second follow-up (c)

18.67±3.03 (19.0, 7-23)

18.16±3.18 (19.0, 9-24)

U=472.5 P=0.463

0.164

-1.029 to 2.050

Test/ P

X=1.702 P=0.427

X=0.698 P=0.705

   

Social Domain

 

Mean±SD

Mean±SD

Test value/P-value

  

Baseline (a)

10.48±1.70

10.69±1.49

t=-0.511 P=0.611

0.127

-0.996 to 0.590

First follow-up (b)

10.70±1.78

10.41±1.60

t=0.692 P=0.492

0.172

-0.549 to 1.130

Second follow-up (c)

10.30±2.08

10.13±1.74

t=0.374 P=0.710

0.093

-0.774 to 1.130

Time

F = 2.00 P=0.140

Group

F = 0.60 P=0.807

Group × time

F = 0.79 P=0.456

Mauchly's test of sphericity: Mauchly's W; 0.987, Approx. Chi-Square; 0.842, p;0.656. The Sphericity Assumed test was utilized as the assumption of sphericity was met.

Environment Domain

 

Mean±SD

Mean±SD

Test value /P-value

  

Baseline (a)

30.27±4.88

30.56±2.76

t=-0.293 P=0.770

0.073

-2.257 to 1.677

First follow-up (b)

30.15±3.51

29.69±3.77

t=0.514 P=0.609

0.127

-1.341 to 2.269

Second follow-up (c)

29.88±4.22

29.31±3.47

t=0.590 P=0.557

0.146

-1.351 to 2.484

Time

F = 1.05 P=0.354

Group

F = 0.13 P= 0.719

Group × time

F = 0.33 P=0.717

Mauchly's test of sphericity: Mauchly's W; 0.900, Approx. Chi-Square; 6.516, p;0.038. The Greenhouse-Geisser test was utilized due to the assumption that sphericity was unmet.

  1. Abbreviations: t Independent t Test, F Repeated-measures MANOVA, X Friedman test, U Mann-Whitney U test
  2. *P<0.05