Table 2 The comparison of participants' Premenstrual Syndrome Scale (PMSS) scores (n=65)

Mean±SD

Mean±SD

Test value/P-value

Cohen's d

95% Cl

Baseline (a)

155.45±19.74

150.72±13.73

t=1.120 P=0.267

0.278

-3.716 to 13.188

First follow-up (b)

113.76±29.45

134.91±24.96

t=-3.118 P=0.003*

0.774

-34.702 to -7.596

Second follow-up (c)

119.30±33.36

141.03±23.84

t=-3.013 P=0.004*

0.748

-36.139 to -7.318

Time

F = 42.64 P< 0.001

Group

F = 6.69 P = 0.012

Group × time

F = 10.54 P< 0.001