Table 5 Convergent validity of the YW-BCI36 with the functioning and symptoms scales of the QLQ-C30 and QLQ-BR23

Overall health status

0.28*

−0.36**

−0.35**

0.61**

−0.35**

−0.63**

−0.43**

0.14

Physical functioning

0.16

−0.22*

−0.33**

0.52**

−0.32**

−0.60**

−0.45**

0.08

Role functioning

0.14

−0.31**

−0.15

0.51**

−0.24*

−0.58**

−0.34**

−0.02

Emotional functioning

0.21*

−0.59**

−0.41**

0.28*

−0.35**

−0.50**

−0.35**

0.21*

Cognitive functioning

0.35**

−0.27*

−0.20*

0.33**

−0.33**

−0.53**

−0.30**

0.05

Social functioning

0.20*

−0.30**

−0.29**

0.48**

−0.30**

−0.62**

−0.46**

−0.01

Financial difficulties

−0.28*

0.02

0.11

−0.42**

0.05

0.28**

0.73**

0.14

Body image

0.12

−0.41**

−0.41**

0.39**

−0.19

−0.31*

−0.31*

0.14

Sexual functioning

0.51**

−0.37**

−0.74**

0.29*

−0.17

−0.33

0.04

0.05

Sexual enjoyment

0.03

−0.33**

−0.65**

0.23*

−0.48**

−0.43**

−0.07

0.27

Future perspective

0.11

−0.66**

−0.32*

0.16

−0.21*

−0.25

−0.13

0.16

Fatigue

−016

0.31**

0.32**

−0.53**

0.20*

0.58**

0.52**

0.02

Nausea and vomiting

−0.22*

0.23*

0.18

−0.22*

0.13

0.35**

0.24*

0.04

Pain

−0.07

0.26*

0.18

−0.37**

0.19

0.51**

0.42**

0.02

Dyspnea

−0.01

0.09

0.02

−0.36**

0.19

0.29**

0.19

−0.19

Insomnia

−0.21*

0.42**

0.35**

−0.17

0.28*

0.46**

0.26**

−0.16

Appetite loss

−0.13

0.31**

0.33**

−0.26*

0.16

0.45**

0.33**

0.04

Constipation

−0.02

0.24*

0.25**

−0.24*

0.12

0.16

0.07

−0.10

Diarrhea

−0.10

0.18

0.10

−0.10

0.06

0.15

0.05

0.001

Systemic therapy side effects

−0.08

0.37**

0.22

−0.49**

0.08

0.42**

0.35*

0.11

Breast symptoms

−0.49**

0.38**

0.21

−0.39**

0.37**

0.17

0.08

0.23

Arm symptoms

0.11

−0.09

−0.19

−0.22

−0.05

0.10

0.17

Upset by hair loss

−0.11

0.27*

0.39**

−0.18

−0.03

0.03

0.08

0.11