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Table 1 Baseline patient characteristics

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

  N %
Hospital   
Dijon 271 71.1
Nancy 74 19.4
Reims 18 4.7
Strasbourg 18 4.7
Inclusion criteria   
Confirmed primary breast cancer 242 63.5
Suspicion of primary breast cancer 138 36.2
Unknown 1 0.3
Cancer   
Confirmed 340 89.2
Not confirmed 38 10.0
Unknown 3 0.8
Lymph node dissection(LND)   
Axillary LND 138 36.2
Sentinel lymph node biopsy 131 34.4
ALND + SLNB 32 8.4
No LND 75 19.7
Unknown 5 1.3
Surgery type   
Mastectmoy 124 32.6
No mastectomy 241 63.3
Unknown 16 4.2
Chemotherapy   
Yes 155 40.7
No 218 57.2
Unknown 8 2.1
Radiotherapy   
Yes 254 66.7
No 119 31.2
Unknown 8 2.1
Hormone therapy   
Yes 170 44.6
No 203 53.3
Unknown 8 2.1
Questionnaires order   
Arm 1: then-test/post-test 192 50.4
Arm 2: post-test/then-test 189 49.6