Table 4.

Results for the secondary outcome somatization measured with the somatization scale of the “Patient Health Questionnaire” (PHQ-15).

	Parameter	Estimate (SE)	Statistics
Results of the multilevel model	Intercept	10.67 (0.88)	t(59.46) = 12.13; p < 0.01
	Intercept* intervention	0.32 (1.28)	t(59.47) = 0.25; p = 0.81
	Time1	−1.25 (0.63)	t(55.33) = −2.00; p = 0.051
	Time1* intervention	−2.05 (0.89)	t(55.03) = −2.29; p = 0.03
	Time2	−1.23 (0.73)	t(52.27) = −1.69; p = 0.10
	Time2* intervention	−2.94 (1.06)	t(53.02) = −2.78; p = 0.01
	Time	Condition	d
Effect sizes (d)	t0−>t1	PE	0.18
		FR + PE	0.73
	t0−>t2	PE	0.19
		FR + PE	0.93
	Assessment point	Condition	M (SD)
Descriptive statistics	Pre-treatment (t0)	PE	10.63 (5.34)
		FR + PE	11.07 (4.59)
	Post-treatment (t1)	PE	9.68 (5.48)
		FR + PE	7.70 (5.20)
	6-month follow-up (t2)	PE	9.62 (6.17)
		FR + PE	6.79 (5.69)

PE, Psychoeducation; FR, Functional Relaxation; Time1, Change from pre-treatment (t0) to post-treatment (t1); Time2, Change from pre-treatment (t0) to 6-month follow-up (t2).