Skip to main content

Table 2 Description of the EORTC QLQ-C30 and BR23 questionnaires received at each measurement time

From: Item response theory and factor analysis as a mean to characterize occurrence of response shift in a longitudinal quality of life study in breast cancer patients

  QLQ-C30 QLQ-BR23
Then-test Post-test Then-test Post-test
Baseline   359 (94.2%)   357 (93.7%)
After surgery 347 (91.1%) 347 (91.1%) 347 (91.1%) 346 (90.8%)
3 months 339 (90.0%) 342 (89.8%) 355 (87.9%) 340 (89.2%)
6 months 314 (82.4%) 322 (84.5%) 313 (82.1%) 322 (84.5%)