Table 4.

Multitrait scaling analyse of the EORTC QLQ-BR23

Scales	Convergence (r, % success)*	Discriminance (r, % success)**
Body image	0,77-0,83, 100	0.06-0.53, 100
Sexual functioning	0,89-0,91, 100	0.09-0.35, 100
Systemic therapy side effects	0,48-0,66, 100	0.01-0.37, 96.42
Breast symptoms	0,04-0.8, 50	0.00-0.89, 0.75
Arm symptoms	0,57-0,84, 100	0.02-0.52, 100

*Number of item-scale correlations greater than 0.40 /total number of item-scale correlations.

**Number of correlations of items with own scales significantly higher than correlations with other scale/total number of correlations.