Independent variables

Model A

Model B

Model C

Adjusted mean difference

95% CI

p-value

Adjusted mean difference

95% CI

p-value

Adjusted mean difference

95% CI

p-value

Therapist characteristics

Sex

Male

Female

0.20

−2.89; 3.30

0.89

Age

0.30

−0.08; 0.14

0.58

Experience

0.02

−0.11; 0.15

0.71

Additional training

Yes

No

−5.26

−10.09; −0.42

0.04

/

/

/

Working in group

Yes

No

1.74

−1.27; 4.76

0.23

Working in interdisciplinary team

Yes

No

0.69

−3.44: 4.81

0.72

Patient characteristics

Sex

Male

Female

−1.21

−3.40; 0.97

0.28

Age

0.13

0.06; 0.20

<0.001

0.12

0.04; 0.19

0.002††

0.12

0.05; 0.18

0.001†††

Education Level

Primary school

Secondary school

Higher education/university

2.77

1.08

−1.56; 7.10

−1.22; 3.38

0.21

0.36

Employment

Yes

No

−0.11

−2.38; 2.67

0.93

Practicing sports

Yes

No

1.58

−0.69; 3.84

0.17

−0.05

−2.34; 2.23

0.96

Prior history of consulting the therapist for another disease

Yes

No

−0.97

−3.30; 1.36

0.41

Consultation type

First

Neither the first nor the final

Final

2.94

3.87

−4.22; 10.11

−2.53; 10.27

0.42

0.23

Dyadic OPTION score

0.15

0.09; 0.21

<0.001

0.13

0.07; 0.19

<0.001††

0.14

0.08; 0.20

<0.001†††