Table 3 Results from GLMM regression models testing between-group effects

From: RT Prepare: a radiation therapist-delivered intervention reduces psychological distress in women with breast cancer referred for radiotherapy

Outcome

Prior to treatment planning (F1)

Treatment commencement (F2)

Treatment completion (F3)

Estimated mean difference

95% CI

p

Cohen’s d

Estimated mean difference

95% CI

p

Cohen’s d

Estimated mean difference

(95% CI)

p

Cohen’s d

Pyschological distress

0.16

−0.56–0.87

0.67

0.05

1.07

0.21–1.93

0.01*

0.16

0.53

−0.47–1.52

0.30

0.08

 HADs total

 HADs anxiety

0.36

−0.08–0.80

0.11

0.09

0.74

0.25–1.24

0.003*

0.18

0.59

0.01–1.17

0.048*

0.15

 HADs depression

−0.18

−0.66–0.29

0.45

0.05

0.32

−0.18–0.83

0.22

0.09

−0.037

−0.60–0.52

0.90

0.01

Concerns about RT

0.60

0.32–0.88

 < 0.001†

0.27

0.33

0.07–0.60

0.01*

0.15

N.A.

-

-

-

Patient knowledge of RT

−3.25

−3.74 to −2.76

 < 0.001†^

1.16

N.A.

–

–

–

N.A.

–

–

–

 Subscale: planning

 Subscale: treatment

−3.23

−3.86 to −2.60

 < 0.001†^

0.90

−1.36

−2.16 to −0.56

 < 0.001†^

0.60

N.A.

-

-

-

Patient preparedness

0.44

0.26–0.62

 < 0.001†^

0.43

0.33

0.15–0.52

 < 0.001†^

0.32

0.15

−0.04–0.35

0.13

0.15

 Subscale: procedural concerns

 Subscale: sensory- psychological concerns

0.33

0.19–0.48

 < 0.001†^

0.35

0.15

−0.04–0.34

0.12

0.16

0.11

−0.04–0.26

0.15

0.12

Procedures: Preparation and anxiety

−1.82

−2.16 to −1.47

 < 0.001†

0.96

−0.71

−1.02 to −0.39

 < 0.001†

0.54

N.A.

–

–

–

 How prepared do you currently feel for the treatment (planning) procedure?

 I know what is going to happen during the appointment.

−2.43

−2.77 to −2.09

 < 0.001†

1.21

−0.81

−1.13 to −0.49

 < 0.001†

0.56

N.A.

–

–

–

 How anxious do you feel about the procedure?

0.44

0.048–0.84

0.03*

0.21

0.35

−0.10–0.80

0.13

0.16

N.A.

–

–

–

Treatment: preparation and anxiety

−1.43

−1.72 to −1.15

 < 0.001†

0.24

−0.42

−0.73 to −0.11

0.009*

0.19

N.A.

–

–

–

 How much understanding do you currently have of radiotherapy?

 How anxious do you feel about receiving radiotherapy?

0.52

0.12–0.92

0.01*

0.26

0.17

−0.30–0.65

0.47

0.09

N.A.

–

–

–

 How prepared do you currently feel to receive radiotherapy?

−1.56

−1.85 to −1.26

 < 0.001†

0.74

−0.51

−0.80 to −0.22

 < 0.001†

0.24

N.A.

–

–

–

 I know what is going to happen during my treatment

−1.69

−2.05 to −1.34

 < 0.001†

0.87

−0.62

−0.96 to −0.28

 < 0.001†

0.32

N.A.

–

–

–

 Did the information that you received to date meet your expectations?

−1.59

−1.88 to −1.29

 < 0.001†

0.88

0.41

−0.69 to −0.13

0.004*

0.23

N.A.

–

–

–

  1. GLMM: generalised linear mixed models. Estimated mean difference measured between intervention and control. * p < 0.05, † p < 0.001
  2. ^ Significant at the Bonferroni-adjusted alpha-level of .025. N.A.: not administered F1: follow-up 1; F2: follow-up 2; F3; follow-up 3
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