Table 5 Construct validity properties of the BCI and FACT-Bl-Cys

Low (< 0.30)

Correlations between 3 domains are low

Urinary – Bowel

0.35

No

Urinary – Sexual

0.15

Yes

Bowel – Sexual

0.25

Yes

Moderate (0.30–0.69)

Correlations between 3 domains and FACT-G are moderate

FACT-G – Urinary

0.29

No

FACT-G – Bowel

0.39

Yes

FACT-G – Sexual

0.36

Yes

Correlations between 3 domains and EQ-5D-5 L are moderate

EQ-5D-5 L – Urinary

0.34

Yes

EQ-5D-5 L – Bowel

0.38

Yes

EQ-5D-5 L – Sexual

0.24

No

Correlations between 3 domains and EQ-VAS are moderate

VAS – Urinary

0.37

Yes

VAS – Bowel

0.32

Yes

VAS – Sexual

0.28

No

Moderate (0.30–0.69)

Correlations between 5 domains are moderate

PWB – SWB

0.30

Yes

PWB – EWB

0.51

Yes

PWB – FWB

0.65

Yes

PWB – Bl-Cys

0.63

Yes

SWB – EWB

0.29

No

SWB – FWB

0.41

Yes

SWB – Bl-Cys

0.35

Yes

EWB – FWB

0.59

Yes

EWB – Bl-Cys

0.50

Yes

FWB – Bl-Cys

0.64

Yes

Correlation between Bl-Cys domain and EQ-5D-5 L is moderate

Bl-Cys domain – EQ-5D-5 L

0.60

Yes

Correlation between total FACT-Bl-Cys and EQ-5D-5 L / EQ-VAS are moderate

FACT-Bl-Cys total score – EQ-5D-5 L

0.70

Yes

FACT-Bl-Cys total score – VAS

0.58

Yes