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Table 2 Effects of a two-month intervention on psychological test scores of the patients of the yoga group and those of the control group (each group n = 15)

From: The longitudinal effects of seated isometric yoga on blood biomarkers, autonomic functions, and psychological parameters of patients with chronic fatigue syndrome: a pilot study

Profile Independent-sample
t test (P)
2-way repeated ANOVA (P) Effect Size between Groups (Cohen’s d)
Yoga group Control group Group Time Group x Time
Chalder FS −6.7 ± 6.9 −0.3 ± 3.4 0.004 0.124 0.001 0.003 −1.165
TAS-20 −0.4 ± 5.9 −0.3 ± 5.7 0.950 0.778 0.755 0.950 −0.017
HADS-A −0.8 ± 2.4 −0.5 ± 2.9 0.786 0.172 0.181 0.786 −0.113
HADS-D −2.6 ± 3.8 0.9 ± 2.7 0.008 0.075 0.163 0.008 −1.062
  1. Values are mean ± standard deviation
  2. ∆: The mean difference between Pre and Post values, i.e. Post value – Pre value
  3. P values Tested with two-way repeated measures analysis of variance (ANOVA) and unpaired-sample t-test